What is acceptable crank endplay? - Page 2

ncontt · 10-16-2010, 02:40 PM

Quote:

Originally Posted by 89five0Gt

Dayum

ya, I know, time for new bearings....

QWKSNKE · 10-16-2010, 06:00 PM

umm yeah. Its not suppose to move that much

ncontt · 10-16-2010, 06:28 PM

I got the crank out...got some discoloration on some of the throws. That's to be expected I suppose, but it looks like the crank will be ok.

ncontt · 10-16-2010, 06:32 PM

Quote:

Originally Posted by EHardy1971

How much end play do you have? IIRC, somebody makes thrust bearings (#3 main bearing) thicker than stock to compensate for excessive end play. BUT, if it's a stock, non-stroker crank, a new one isn't that expensive.

It's a 331 setup. 5.4 rods I "think"...eagle h-beams, probe pistons, and eagle crank

Clevite 77 bearings are in it now

QWKSNKE · 10-16-2010, 08:12 PM

Quote:

Originally Posted by ncontt

I got the crank out...got some discoloration on some of the throws. That's to be expected I suppose, but it looks like the crank will be ok.

At least the girdle is custom machined if the crank ever does that again

EHardy1971 · 10-17-2010, 02:09 AM

Quote:

Originally Posted by ncontt

actually it was a between 1/8 and 1/4....that is between the main and the crank, not between the crank and bearing surface.

Oh, I knew what you were talking about.

Quote:

Originally Posted by QWKSNKE

At least the girdle is custom machined if the crank ever does that again

ncontt · 10-17-2010, 10:29 AM

Quote:

Originally Posted by QWKSNKE

At least the girdle is custom machined if the crank ever does that again

good point!!

coupe · 10-18-2010, 07:31 AM

I've seen similar issues when the transmission converter-to-crank spacing is off...or the pilot part of the converter is too tight (painted or powdercoated). Also seen issues when the driveshaft was too long and pushes everything forward under acceleration.

What clearance did you start out with? Should be setup somewhere around .006-.007 ideally. How long did you drive it before this issue?

ncontt · 10-18-2010, 02:57 PM

Matt, not sure what the initial endplay was set at....the engine was built about 5-6 years ago by Billy Kimmel from Columbus, GA and has less than 1K N/A miles on it and "maybe" 20 turbo'd miles on it. Part of the reason I could never hear the racket it was making was the Edelbrock Gear drive and the preponderance of exhaust leaks!!!

At least I found it now instead of later.

I've checked the converter and haven't seen anything that looks fishy, but that's not to say that it's not seating properly against the flexplate/crank.

A buddy of mine who works for Jasper and is a mustang guy seems to think it was b/c of misaligned accessories (which is entirely possible) as I "used" to have a cobbled together Trickflow A/C delete kit on there (probably 95% of the mileage that's on the car) that I KNOW for a fact wasn't aligned just right....

All I know is that the crank is more than likely FUBAR'D .....

93cobra1928 · 10-18-2010, 05:21 PM

Misaligned accessories isn't going to do that. The damage is on the back side so follow what Coupe said to check and you will find the problem.

10-16-2010, 06:00 PM	#12
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	umm yeah. Its not suppose to move that much __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

10-16-2010, 06:28 PM	#13
ncontt pro-jackstand racer Join Date: May 2005 Location: Milner, Ga Posts: 2,473	I got the crank out...got some discoloration on some of the throws. That's to be expected I suppose, but it looks like the crank will be ok. __________________ And God created Neil Peart so that lightning would make sense to the world. ~~~~~~~~~~~~~~~~~~~~~~~~~~~

10-18-2010, 02:57 PM	#19
ncontt pro-jackstand racer Join Date: May 2005 Location: Milner, Ga Posts: 2,473	Matt, not sure what the initial endplay was set at....the engine was built about 5-6 years ago by Billy Kimmel from Columbus, GA and has less than 1K N/A miles on it and "maybe" 20 turbo'd miles on it. Part of the reason I could never hear the racket it was making was the Edelbrock Gear drive and the preponderance of exhaust leaks!!! At least I found it now instead of later. I've checked the converter and haven't seen anything that looks fishy, but that's not to say that it's not seating properly against the flexplate/crank. A buddy of mine who works for Jasper and is a mustang guy seems to think it was b/c of misaligned accessories (which is entirely possible) as I "used" to have a cobbled together Trickflow A/C delete kit on there (probably 95% of the mileage that's on the car) that I KNOW for a fact wasn't aligned just right.... All I know is that the crank is more than likely FUBAR'D ..... __________________ And God created Neil Peart so that lightning would make sense to the world. ~~~~~~~~~~~~~~~~~~~~~~~~~~~

10-18-2010, 05:21 PM	#20
93cobra1928 Dazed and Confused Join Date: Mar 2009 Location: Northport, Al Posts: 778	Misaligned accessories isn't going to do that. The damage is on the back side so follow what Coupe said to check and you will find the problem. __________________ Proud owner of 93 Cobra #1928 306ci Forged flat tops, Windsor Sr iron heads, FMS X-303 cam, OE Cobra upper and lower, 65mm tb, 70mm maf, 24lb injectors, BBK shorties, Summit H-pipe and Flo-bastards

10-18-2010, 07:31 AM	#18
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	I've seen similar issues when the transmission converter-to-crank spacing is off...or the pilot part of the converter is too tight (painted or powdercoated). Also seen issues when the driveshaft was too long and pushes everything forward under acceleration. What clearance did you start out with? Should be setup somewhere around .006-.007 ideally. How long did you drive it before this issue?