- Crankshaft end float. Also where I had the crank balanced and 8 dowelled it may have had a slight skim off the end of the crank? Oct 4, 2013 · Well I agree too little end float isn’t desirable either however I am talking about too much end float and I can think of possible problems that could occur with . The washers I have installed now measure . No cable box or long-term contract required. geonetta » Sun Jul 03, 2016 11:05 pm More questions for the experts I set the end float according to Drags specification of . 006” to 0. Did I Jan 30, 2011 · I respect the advice of shimming for "proper end float" of the previous posts. I've not had to deal with my TWs yet, but it gives what appears to be a pretty good explanation and approach. If the engine has twin roller mains fitted, the potential problem can be that the 6 start oil drive worm can push the crankshaft side-ways. If the end play exceeds the specified range, it may indicate worn thrust Jan 16, 2015 · Hi! New on this forum, delighted to find it! I have a Q for the really experienced 2-t engine guys: In Bell's book on two stroke tuning, in the chapter about the bottom end of a 2-t engine, he claims that the crankshaft end float (side to side movement of a healthy crankshaft in a freshly Too much end float and clutch disengagement is adversely affected, the gear floating up and down the crankshaft in unison with the clutch plate. Regular engine maintenance, proper bearing care, and attention to engine vibrations are key to maintaining a healthy Oct 31, 2022 · A dial indicator should give you a couple of thousandsths movement, but the other end (pick up end), while being turned by the crankshaft probably cannot slide along that longitudinal axis. Jul 15, 2017 · If its loose it can add to the end float clearance because the bearing is moving back and forth as your doing the end float check. END FLOAT definition: End float is the amount by which a shaft can move lengthwise. K. Insert a feeler gauge between the thrust bearing surface on the crankshaft and the corresponding surface on the engine block. 002-. Andy. If an engine is assembled with too much end play in the crank, or if the thrust bearing fails, the forward movement of the crankshaft in Measuring End Float Using A Dial Indicator Below is a drawing showing how to take a crankshaft end-float measurement while using a dial indicator mounted on a magnetic base. 008 so I'm calling the clearance . Contact Kingsbury | Contact Kingsbury Repair & Service May 8, 2018 · It seems that by setting the end-play iaw the manual, after final assembly,the "end-float" wouldn't make any difference, in that the crank can move no more than the established end-play. I'll be using a C4 trans if it matters any. 002 to . 0920. 0910. 092" with an end-float of . Whilst srtobing my '71 t120 i noticed movement of the rotor. May 1, 2003 · Thrust bearings are used to control end play in the crankshaft. There were a couple of threads on here claiming that nobody has problems attributed to crank end float and it's common for people to run Jul 12, 2015 · I know this has been discussed many times and I know the general consensus is that it's not that important, but being more of a Triumph guy, the issue of crankshaft end float is odd to me. If that's the case, should Apr 27, 2017 · Good call. Apr 7, 2025 · Ive no experience of this engine but a quick google suggest end float should be between 4 and 8 thousandths. As the drive side is bolted up solid and shimmed, why worry about float clearance as it won't float anyway. 0066". When i have installed the crank and measured the end float i get a reading on a dial test indicator of 9thou against a tolerance of 4-8 thou. 007. 005 BSA A7 crankshaft end float demonstrated and discussed. I'll just go and crawl back into my hole. When engine is cold movement is within tolerance,just,when engine is well warmed up movement is huge,around 40thou+,also when warm primary sounds like there's something loose,remove cover,nothing. Learn more about Check and Adjust Crankshaft End Play. 011 Please like and Subscribe Add me Mar 4, 2019 · What happens when crankshaft fails? A failing crankshaft position sensor cannot provide the right information about piston positioning in the engine, causing a cylinder to misfire. after taking the crankshaft out I noticed the thrust washers were worn a little bit so I ordered standard size. • Before disassembly, checked crank end-float and got . Early V8 (1932-53) Jun 26, 2017 · Which is the best method to check the crankshaft end float, have an old set of FAG bearings ground to ease fitting/removal ? 750 Commando crank, cheers David Dec 31, 2023 · A few days ago I installed my new thrust washers from Scott Helms. If I was to use (2) "superblend" NJ306E main bearings, I would shim for the end float the way comnoz recommends. Jun 20, 2022 · The Dreaded Triumph Crankshaft End Float! may be of help. What thrust washers do I need to buy to reduce the figure and what is an exceptable endfloat. 005. Mount the dial indicator on the magnetic base and adjust it so that the tip of the plunger rests against the front of the crankshaft. Aug 1, 2017 · hi , I have a a10 1959 , the end float is 15 thou, can I still ride it or is it too far gone, will it do a lot of damage , it is a strip down of the engine I would like to avoid this as I am only a sunday morning rider your thoughts on this will be very welcome , thanks P P Feb 13, 2014 · Reading posts you often see the phrase "end float" used - I assume its movement of the crank within the engine case - am I right, can some one describe While there will always be some force on the crankshaft, too much crankshaft end play from these forces can lead to damage and the need to tear down the engine. Anyone know ? Thanks to you Cylinder Head Videos- Replace a Valve Stem Seal: https://youtu. Jan 2, 2025 · With this set, you shouldn’t be able to feel or hear any movement by tugging on the crank pulley. 007" feeler gauge between the crank and the shim - but not a . Dec 13, 2023 · Hello, Ive been looking into ducati 2v bottom end rebuild, did some research but couldnt get clear answers on two points about crankshaft axial preload and endfloat. 0915 - . Mar 1, 2024 · Would appreciate opinions and checking my math: • Assembling an 1800 engine that has been returned from machine shop. You wouldn’t be able to see that simply by moving the flywheel axially so it needs to May 30, 2018 · Reassembling my engine and the crank end float is out of spec. I measured it a couple of times and I am getting 11-12 mm. The weekend before I was giving the airplane a thorough crankshaft end float by Danny. • Engine was purchased from a running / driving car after rear-end accident totaled car. Jul 13, 2020 · I would be surprised if there is enough crankshaft end float to cause this problem but 'stand to be corrected'. 008. Tom 1960 TR3A TS73117 (under endless restoration, owned since 1964) Feb 20, 2024 · The problem is once crank end float goes out of tolerance wear is accelerated, and the inevitable lost washer, and subsequent main bearing cap, and crank damage happens. My book has the tolerance listed as . 002" end float. 005 end float. So how to measure and correct crankshaft end float. Lee » Tue Jul 29, 2014 9:08 pm If the bearings are an interference fit in the crankcase, and a press fit on the shafts, where does the movement come from in crankshaft end float? I only ask as I will be putting my VB crank back in this week. 30 mm - Controlled by: Selective thrust washers on rear main bearing. Clutch Sep 20, 2023 · I have been reading various articles on this site and others talking about the importance of measuring TR6 Crankshaft End Float on a frequency roughly in line with oil changes, in order to catch any possible issues with thrust washers wearing out sooner (while they are easy / cheap to fix) instead Jun 9, 2017 · Can anyone provide pictures and instructions on how to measure crank end float on an installed engine? This is on an engine that's been running about 70k miles since it was rebuilt last. 010-0. I took some rough and rather unreliable measurements today that show things might be out of spec so I feel like I should take "real" measurements using a dial indicator Jul 28, 2011 · Hi Steve, the only way of measuring the correct crankshaft end-float is to assemble the crankshaft components completely and use a feeler gauge between the rear shoulder of the crank against the forward internal face of the rear support bearing. 020", with all case bolts torqued. ripping too much apart!) I'm hoping someone here can offer some advice/tips I'm looking for ideas on how to measure crank end float with the engine in the car and the sump in place. Since this is a simple repair, and since we had the engine out for work on the gearbox anyway, it seemed In this video we look at the cause of a rebuilt engine seize and discover that it was down to crankshaft end float issues. in my ignorance i didnt notice, but as the Mar 8, 2023 · Can an LS or any engine having to tolerate a range of temperatures be assembled without crankshaft end float? Same but different on small diameter needles in high loading; GM uses needle bearing trunions, but does not put rollers on the tips of the rocker arms. The end-float is adjusted by changing the thickness of the rear thrust washer only. Would new standard washers bring it back to spec, or can anyone suggest which oversize (or combination) would do the business? Feb 18, 2011 · i had an unusual cause of end float, during my first ever engine build: i bought a new crankshaft and new bearings. Excessive end float can never be due to "normal" thrust washer wear, as these should last easily a few hundred thousand miles. 003 Oct 12, 2015 · Page 1 of 2 - Crankshaft Endfloat - posted in Problems, Questions and Technical: I fitted the crank to the block tonight at the start of my engine rebuild, all went well until I checked the end float which I measured at 10 thou. What can I do to tighten it up a bit? Is Nov 12, 2004 · Crankshaft End Float - Dimension: 0. This guide will provide a step-by-step approach on how to check crankshaft end play using a feeler gauge. Jul 13, 2011 · The crankshaft has alot of end play or up and down it moves to much , ive taken apart basicly all the diffrent kinds of the newer engines like the v-twins and the single cylinders but ive never taken these older twin engines apart. I'm using Dial test Indicator and have it positioned against the fan extender. End Float (or end play) - Automotive Technical Terms Explained in the Unique Cars Auto Dictionary Feb 4, 2016 · I have recently dismantled the Primary chaincase to fix oil leaks on my 72 750 and decided to check the crankshaft end float. Jan 30, 2014 · Re: crankshaft end float by kommando » Mon Apr 27, 2015 9:35 pm Other way to do it is to add a shim and assemble, check the crank spins freely, diasemble and add anothe shim and repeat, once the crank binds disassemble and remove a 10 thou shim and you are guaranteed less than 10 end float. Mar 6, 2017 · So, if all is in good order, there is no perceptible end float on the crankshaft and the rollers of the drive side bearing are running central on their tracks, not tight up against the shoulder of race. Jun 21, 2014 · All these things will increase end float, and you need to ascertain exactly what is wrong, as the bush flange thickness/crank thrust shoulder relationship is what positions the crank assemblies in the casings. Too much end float can have an adverse effect on rings and pistons, do you think this 1 thou over tolerance will be harmful? Oct 22, 2016 · Best place to measure is one end of the crank, usually the drive side with the bottom end assembly firmly held in a vise. 008" with a service limit at 0. I read somewhere on here that the standard TW's are . 4". Time spent with a hammer and block of wood Aug 3, 2009 · I Dont Seem To Have Any "crank End Float" - posted in Problems, Questions and Technical: Im currently building a 1380 engine and ive fitted the crank and thrust washers but i dont seem to have any movement in the crank, im told that i should have upto 6thou? The crank spins freely without any binding to speak of, can i just let this go do you think? Im just going by feel rather than a dial Jan 16, 2005 · Like I have the engine out of the frame, I had think to check the end float first supporting the engine over the side of crank and after supporting the engine over the case when the crank fall down and measure each position. I'm planning on removing the engine and splitting it apart soon to investigate/fix, but before diving in too deep (i. Jul 22, 2024 · after taking the crankshaft out I noticed the thrust washers were worn a little bit so I ordered standard size. Dec 18, 2018 · Building a 57 DA10 bottom end. Jul 20, 2024 · Crankshaft end float refers to the axial movement of the crankshaft within the engine block. And there is no gasket fitted according to the Haynes. 00 Apr 22, 2020 · End floatThe timing side needle roller bearing has a combined ball thrust race. 0075. That was 40,000 miles ago and everything is fine. Some suggest using 0. 20 mm - Service Limit: 0. So if you're saying these are massively worn at only 20k, that is Feb 10, 2025 · If you need a lever to move the crank to obtain that float, you may be tight. or is it to much, I read the end float should be . Crank end float with existing worn thrust washers is 012 thou. Ignore any excess crank endfloat at your peril, it can have very expensive consequences all for the sake of a couple of quid new thrust washers. What does control crankshaft end play in a GS500 engine?. If it does need shimming on timing side What shims do we use as none are shown in parts book and the Apr 28, 2017 · Looking for some feedback for setting up my 75 TR6 crank shaft end float. As the following picture indicates, I can sneak a . End play is the total distance the shaft can move between the two thrust bearings and is sometimes called float, thrust bearing clearance or axial clearance. 200000) and not Mk3. Feb 28, 2012 · Hello me again, I think I've found the reason for my crankshaft oil seal problem ( see other post) excessive end float! Tonight's question; is it possible to replace the crankshaft thrust washers while lying under the car? Or is it an engine out job?? Please, please tell me there is a way of I today's video, I will show you how to measure the end of the crankshaft where the rear main seal is, using a dial gauge. So basically when assembling the cases back together, one must measure crankshaft end float. I have a manual that shows a simple picture of the magnetic base attaching to the front of the Triumph TR6 Thrust Washer Explained If you have performed an engine crankshaft end float check and found the measurement to be beyond the allowable limits according to your workshop manual, then you need to stop driving your car immediately and determine the cause of the problem. The factory spec is 0. Jun 9, 2024 · Quick notes The crankshaft, a vital component in internal combustion engines, plays a pivotal role in converting reciprocating motion into rotational motion. The book says 0. 5mm of endfloat. Two questions. I've also had the bearings for years, Nylen brand, dated around 1995, made in USA, the older guys will remember them. Aug 1, 2023 · Note that the recommended end float increased when the second roller bearing was introduced (from eng. 70mm, which according to my manual is approximately 2x the limit. There should be about 3 thou float. 018"-0. 3mm, some say Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. 003 In the "manual" it states . | Meaning, pronunciation, translations and examples Jul 14, 2023 · End Float John Hudson reported that he often came across newly built Commando engines with up to 40 thou of end float in their crankshafts. When resealing the sump take the time to make sure the flange of the pan is straight before putting things back together. Andy Sep 17, 2018 · Has anyone measured the crankshaft end float while the engine is in the car? I tried to do this today with my '68, but found it next to impossible to attach the magnetic base and get the dial in position. 004 for the front crank and . Sounds like the thrust washers may be worn. So even though I'm in spec, I'm not far away from being out. Jan 9, 2013 · Oskar, Because the end float is as large as it is you should consider new thrust washers while you have the sump off to reseal it. A dial indicator gauge tip is connected to the crank end and the opposite end is pulled and pushed to its limits. You must be able to push/pull the crank through the timing side bearing to get this measurement, and that can sometimes take 800 lbs force or so. Back to the 4 shim theory then? I have had suggestions that some aftermarket cases require 4 shims. Why do you need end float? Jan 4, 2020 · In reassembling I have measured crankshaft end float and currently have 0. It is a critical parameter that ensures proper engine operation and longevity. 005 is this O. Dan Feb 15, 2024 · Or should I be checking the end float with the cases bolted up, sprocket nut torqued to spec, DTI on the crank and then calculating the size of spacer needed? The Factory Service Manual only states if the crank end float exceeds 0. 008”. be/C0bvpkIQTt8- Cylinder Head Valve Ste Feb 12, 2011 · Unless you know that the above-spec end float was caused by a poor rebuild in the past, too much end float would probably indicate that more bearing work will be needed. The roller bearings at the other end have no effect on positioning. 08 - 0. 003". The hotter it gets due to Apr 29, 2019 · i know. Gently but We measured the end float in our Triumph Spitfire and found that it was just out of spec. Actually the front crank was . Too little end float and the gear is likely to be pinched tight as it gets hotter in operation. 012". It is unlikely that dropping the pan to fix just end float would make much sense. It's a freshly machined crank, but I've had it for years. Am I right? But what the heck do I know? That's why I ask. 024” end float like messing up the little timing degree scale or premature wear of the oil pump worn gears and primary chain/belt (out of line). A write up with photos on this procedure was in the Triumph Spitfire & GT6 Magazine quite some years ago, written by myself. Jul 22, 2020 · Classified ads, photos, shows, links, forums, and technical information for the Volkswagen automobile Jun 21, 2010 · Too Much Crank End-float Advice Please - posted in Problems, Questions and Technical: Folks, Looks like I've got a couple of mm end-float on my crank (visible when depressing the clutch). So, I investigated the various Norton sources I have for crankshaft main bearings and end float (all in Mar 16, 2020 · Have you still got the 2mm end float at the crank pinion end? Maybe someone knows better than me (decidedly likely) but I can't see how the crank can float unless the clamping washer has worn thin, or something's up with the TS main bearing - which is a caged ball bearing. Jun 23, 2007 · Now to measure end-float, I have standard thrust-washers. And if it is excessive what would need to be done? My end float measures just a hair under . Paul Henshaw's classic motorcycle channel. Cancel anytime. How check your crank shaft end play and how to adjust if you have too little or too much (Thrust Bearing Adjustment) Feeler Blade Method SBC Spec is . 011". 005-. While crankshaft float is a crucial concern, it is not the only factor affecting engine performance and reliability. End play is important because it limits the fore and aft movement of the crankshaft in the block. Jun 22, 2017 · Assuming this is the cast-iron gasket between the crank end and the socket on the flywheel, use the old one to set the dim, fit the new one on final assembly. As many of you know, Scott aims for . 007 replace main bearings. I believe the end float Specifications are 0. Mike Murray wrote: 3 Like VW do you have to use three shims? Or can you use any amount? The factory says ONE of the right size. 003 Mar 29, 2016 · Hi, I would like to understand setting the end float for the crankshaft better In the "MGB Engine Rebuild for Make-A-Wish Project" post 261 the reference for the end play is . . Sep 24, 2024 · Overview Crankshaft end play, also known as axial clearance, is a critical measurement that indicates the amount of movement the crankshaft has along its axis within the engine block. e. 012". Nov 20, 2013 · When I rebuilt the engine (due to general wear on bearings and cylinders) the crankshaft was still sitting at 0. ) Aug 7, 2017 · Esprit Giugiaro (1976 - 1987) Esprit Technical Forum Engine/Ancilliaries Crankshaft end float Sep 26, 2021 · Starting to rebuild bottom end. Dec 31, 2024 · Hello i have pulled apart the mp8 engine to change a rear idler pully and wanted to find out what amount of endfloat in the crank shaft of acceptable. May 11, 2011 · Hi to all,got another one. 005" Mar 11, 2016 · And end float can still be checked, as done by the original poster in order to know when to replace both washers. 006-8 is spec. The 2 parts of the inner race pull together and locate the ball thrust race and eliminate any end float. 012”. This with crank installed and tapped forward and backward to seat the thrust washers then main bearings torqued down. My old TWs were . Download manual for Briggs & Stratton CE8069, 271172, 270962, 276535, 273521. I'm guessing that with the crank laying in the block with the thrust bearings in place I use feeler blades and ch Aug 16, 2018 · Crankshaft endplay is a critical tolerance to pay attention to when building an engine, and Jeff Smith shows you the checking and setting process. The instructions say to 'lever' the crankshaft to one end and measure the difference by the thrust washer. This “proper” endfloat is set by adding a set of three very slim shims when assembling the flywheel to end of the crank. If you hear a “clunk”, there’s work to do. be/sn9OXgihERc- Valve Spring Inspection: https://youtu. 004-0. As Dave says the crank is locked when the oil pump worm is tightened. So does this kind of engine have thrust bearings like a car engine any help thanks for your time Mar 28, 2012 · Crank End Play, Should I be worried?? Page: 1, 2, 3 Next Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic Jump to: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum Oct 6, 2013 · Proper clearance is required in many areas of your engine—piston to cylinder wall, crankshaft end float, camshaft end float, connecting rod side clearance, and then also things like spring valve lash. Dont attempt to check for end float without the timimg side fully assembled with pinion and worm drive because you bottom end is not properly Sep 25, 2017 · G'day folks, We need to know what the End Float should be on the crankshaft of a 1951 A10 Engine with the small journals . 091" & . ,but at what clearance should one get concerned? thank you. 003 to . Important note: No matter what type of thrust washer you have installed in your Triumph engine, it is imperative that you make engine crankshaft end-float checks a regular maintenance routine. My Bently manual calls for . (Someone correct me if I'm wrong, but to my "limited Norton knowledge", Norton didn't bother shimming the crankshaft end play on production bikes anyway. Block work consisted of decking, installation of valve guides, and cylinder boring. Dec 8, 2020 · Morning all, I measured the end float on my 73 TR6. The dial indicator tip (Figure 4) is placed against the face of the crankshaft pulley, and the magnetic holder (Figure 2) is to be securely attached to the engine block so that it will not move during readings. 002 - 0. 006 for the rear. Shim goes between crank and bearing on the drive side, I was lucky and got it right first time was left with 1 thou end float ( wasn't going to go through it all again for 1/2 a thou. If you use a lever on the crank flange, the center web of the block will easily deflect and give you a false reading. 003-. Aug 4, 2024 · Main points Crankshaft end play, a crucial parameter in engine operation, refers to the axial movement of the crankshaft within the engine block. Check the case threads for any stripped threads. Finally in October I was ready to fly to Oshkosh and transition with Joe in the Sonex. And then it goes on to explain the Main Bearings (number / type / static clearance and configuration bla bla bla). Jul 3, 2016 · SQ4 crankshaft end float by greg. At this stage I have the TWs in place and the rear main cap bolts just snug, not yet torqued. Checked my crank shaft end float and found it to be 0. The dial indicator will flick up n down to show the total free play. If I did the math correctly that comes out to . After replacing the crank with the new washers and bolting the middle cap down I measured the end float to be . 006 shim to get . Some two-strokes have cranks that float a certain amount, but they, of course, have ball bearings on the crankshaft. The result is a graunching gear change since the plate isn't clearing the flywheel and pressure plate surfaces fully. It measures out at . Another Dec 12, 2010 · The Crank is also ground to these dimensions. In this video I dry-assemble the crankcase and check the end float of the crankshaft. With the engine out and the sump removed you have done the parts that make thrust washers difficult. I normally find it to be more like 0. Oh - STFC - something to do with 'Sell' & 'Car'. Jun 20, 2015 · I doubt if the end-float has been measured in this case. 004 to . This could also occur from faulty spark plug timing, but if the spark plug checks out, then the crankshaft sensor is likely the source. Dec 3, 2015 · Crankshaft end float shimming Posted: Thu Dec 03, 2015 9:19 pm by Rotodyne Hi everyone, Back in May I purchased Onex 0069 from her second owner and then had an agonizing wait while I completed my check-ride, tail-wheel, and transition training. it turned out that the crankshaft had the wrong chanfer / radius machined on it so the thrust bearing could not butt up against the crank thrust face. 005 with no shims, and I set the rear up using a . Jul 27, 2014 · After too many years I'm about to start the rebuild of my s4s engine but will have a few questions for the engine guru's out there. Aug 24, 2022 · Excessive crank end float. Live TV from 100+ channels. built it all together and after a few hunderd miles it developed 1. I don't know the history of the engine and have not lifted the heads, but the Apr 16, 2014 · Hey Guys, I'm assembling a 289 and the crank end float is at 0. It must be measured with all crank nuts undone and the crank pinion away from the timing side bearing. n0x hyfug0 foeeb oqoe uyhtrw dbgom xdxbz aeqya mr6nv x9d
