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#1 |
Registered User
Join Date: Dec 2005
Location: SJC
Posts: 158
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crankshaft endfloat - .001"-.006" ya right!!
I pulled the th350 out of my truck to install the 700r4 today. While i was checking things out on the flexplate area, i checked the crank end float which I found to be about 1/16", forget about a few thou's of an inch
![]() I'm pulling the damn thing - better to do it right than be sorry in the long run.
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___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI ![]() Last edited by Greubin; 03-26-2006 at 02:16 AM. |
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#2 |
Account Suspended
Join Date: Apr 2004
Location: N.C. high country
Posts: 6,107
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Re: crankshaft endfloat - .001"-.006" ya right!!
Looks to me that you may be pulling the motor out for a new crankshaft kit...If you dont the 700R4 front pump will get damaged by the converter moving forward and back everytime you stop and go...then it will tear the tranny up you just put it,It is about 150 for a crank kit...with bearings....I would advise to do it soon,so you wont be doing the engine and trans again...Not to much to fix it now... The 700R4 has an alumn front pump,unlike the Th350 you just pulled out that can take some abuse... Been there and done that several times,Just trying to help you save some $$...Erick
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#3 | |
Registered User
Join Date: Dec 2005
Location: SJC
Posts: 158
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Re: crankshaft endfloat - .001"-.006" ya right!!
Quote:
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___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI ![]() Last edited by Greubin; 03-25-2006 at 10:03 PM. |
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#4 |
Account Suspended
Join Date: Apr 2004
Location: N.C. high country
Posts: 6,107
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Re: crankshaft endfloat - .001"-.006" ya right!!
Its alot easier to remove the motor and put it on a stand,then turn is over,pull the timing cover and pan,then lossten rods and mains caps,then remove crank carefully... going back is imporant not to nick the crank with the rods.. It can be done in the truck ,but faster to pull it out and back in...
The crank kit gives you recond. crack,rod and main bearings..while your there put a stock oil pump in,cheap insurance..About 200 in parts,local store |
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#5 |
Account Suspended
Join Date: Oct 2004
Posts: 1,276
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Re: crankshaft endfloat - .001"-.006" ya right!!
Sounds like it's time to pull the mill. It is way easy on a stand and don't even think about doing it under the truck!!! I have changed out a rod bearing before, but that is pretty minor. At the same time it wouldn't cost toomuch more to rebuild the engine.
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#6 |
Registered User
Join Date: Dec 2005
Location: SJC
Posts: 158
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Re: crankshaft endfloat - .001"-.006" ya right!!
After having dinner and a frosty beverage, I agree that the best thing to do is pull the engine. I just installed fresh heads about 500mi ago. I doubt a shortblock will set me back that much. Better to do it right then take shortcuts.
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___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI ![]() |
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#7 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: crankshaft endfloat - .001"-.006" ya right!!
Better to do it right, than to do it over.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#8 |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: crankshaft endfloat - .001"-.006" ya right!!
Well I hate to disagree with all you guys but if you're worried about the torque converter damaging the front pump then you must remember how much you have to move it forward to bolt it to the flexplate. It's way more than .060. If there were issues with oil burning or low compression then I would go ahead and rebuild the engine. If it's a racer then yeah but for a driver then I think it will be fine. After all its been running excellent. JMHO
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#9 |
Account Suspended
Join Date: Oct 2004
Posts: 1,276
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Re: crankshaft endfloat - .001"-.006" ya right!!
Okay. Let's think about that end playn number one more time okay??? A 1/16 of an inch is like way over .060 and that is almost 10xs that is Ten times !!!!!!! the limit. What or why or how come or what if or whatever is letting this be is MAJOR concern. Period!
Pull it !!!! Rebuild it!!! |
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#10 |
Senior Member
![]() Join Date: Mar 2000
Location: Rockville,In. USA
Posts: 3,720
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Re: crankshaft endfloat - .001"-.006" ya right!!
That much end play will Definately damage the Transmission, I had one that broke 2 TH350 bellhousings almost completly off the transmissions in a 3 week period and that motor when we checked the end play had less than 1/2 what you have currently, save money by not replacing a tranny every few weeks and take care of the bottom end.
GMCPaul |
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#11 | |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: crankshaft endfloat - .001"-.006" ya right!!
Quote:
and 1/16"=.0625 I still wouldn't pull an engine that hadn't given me any problems. Besides we don't know for sure that he has that much endplay.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#12 | |
Registered User
Join Date: Dec 2005
Location: SJC
Posts: 158
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Re: crankshaft endfloat - .001"-.006" ya right!!
Quote:
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___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI ![]() |
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#13 | |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: crankshaft endfloat - .001"-.006" ya right!!
Quote:
BTW are you familiar with setting up a 700r4 as far as the tv cable and the line pressures? You can damage that tranny far easier that way if they aren't set up correctly. There is tons of information in the boards so good luck and enjoy your ride. VV
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#14 | |
Registered User
Join Date: Dec 2005
Location: SJC
Posts: 158
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Re: crankshaft endfloat - .001"-.006" ya right!!
Quote:
Thanks for all the replies
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___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI ![]() |
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#15 |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: crankshaft endfloat - .001"-.006" ya right!!
Aside from the fact that movement of 1/16"-1/8" should give you leaking problems from both ends..........all of the metal that has worn off of either the bearings or the crank has to have gone somewhere.
I would rebuild it, paying extra attention to anything that you intend to reuse. Things like rocker arms/balls, distributor shaft, etc. can re-contaminate your rebuild. |
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#16 |
Registered User
Join Date: Dec 2005
Location: SJC
Posts: 158
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Re: crankshaft endfloat - .001"-.006" ya right!!
The machine shop tore the engine down last week. The crank rear main was all jacked up, needs a thrust weld ( I exchanged for good crank ). Engine was definitely tired, looking forward to starting the engine / tranny install this weekend.
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___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI ![]() |
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#17 |
Senior Member
Join Date: Apr 2005
Location: metro Phoenix, AZ
Posts: 241
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Re: crankshaft endfloat - .001"-.006" ya right!!
Howdy:
Happiness is not having to worry about when your truck would strand you! Please update us on your build! cowboy33713 |
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#18 | |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: crankshaft endfloat - .001"-.006" ya right!!
Quote:
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