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Registered User
Join Date: Feb 2011
Location: San Antonio, TX
Posts: 122
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Rebuild issues...
So i did rings and rod bearings when i put the new engine in my car...
Once i torque the rod bearings i can not physically turn the crank... 3 ft breaker bar on the crank bolt and it won't budge a MM. Back the rod nuts off and it turns... What's the deal here? The manual i have says 42ft/lbs torque on the rod nuts. But i can't budge the engine when it's torqued... All the bearings are in correctly and there are no over laps... Im at wit's end with this... Any input would be greatly appreciated!
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Early 1985 944. I like Bacon |
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10-21-2011, 11:05 AM
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Toofah King Bad
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Did you plastigage the bearings?
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» 1987 924S Turbo - Got Boost? « "DETERMINATION. Sometimes cars test us to make sure we're worthy. Fix it." - alfadoc |
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10-21-2011, 11:23 AM
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Registered
Join Date: Mar 2008
Location: Chicagoland
Posts: 2,695
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did you put the right rod caps on the right rods? each of the rod and rod caps have a stamping number on em.
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10-21-2011, 11:27 AM
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Quote:
Did you have any work done to the crank? It should turn real easy. It sounds like there may be "tolerance stack" meaning that the crank is at it thickest acceptable point and so are the bearings making them too tight. I believe there are also bearings made to fit after the crank has been machined so they are purposely thicker. You didn't accidentally put those in did you?
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1979 928 85 Euro 2v motor,S4 Brakes and suspension, 1988 951 street legal track car(sold) Neon SRT4 track car Last edited by Pete R; 10-21-2011 at 11:35 AM.. |
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10-21-2011, 11:33 AM
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Back from Beyond
Join Date: Nov 2004
Location: Alberta, Canada
Posts: 2,697
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^+1 That was my thought - oversize bearings. The crank should turn easily.
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'88 944 Auto - project, kinda '87 944 Auto - died saving my wife '84 944 5SP - crushed under shop roof during snow storm All others GONE! |
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10-21-2011, 01:08 PM
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That Guy
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Well i gotta ask, you did use assembly lube right?
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Jon 1988 Granite Green 911 3.4L 2005 Arctic Silver 996 GT3 Past worth mentioning - 1987 924S, 1987 944, 1988 944T with 5.7L LS1 |
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10-21-2011, 01:16 PM
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Registered User
Join Date: Feb 2011
Location: San Antonio, TX
Posts: 122
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Caps were on backwards... :/ I have no idea how i pulled that off, as i marked each one independently to the rod...
Engine is still "tight" to turn over but it turns now... I think once it seats the rings it will be much better... This is just my opinion how ever...
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Early 1985 944. I like Bacon |
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10-22-2011, 06:47 PM
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Registered
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Quote:
Turn the engine and remove the caps and check the bearing for any marks then you will know.
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1985 944 2.7 motor,1989 VW Corrado 16v,57 project plastic speedster t4 power,1992 mk3 Golf,2005 a4 b7 qt avant 3.0 tdi,1987 mk2 Golf GTI,1973 914,2.2t to go in. Past cars, 17 aircooled VW's and lots of BMW's KP 13/3/1959-21/11/2014 RIP my best friend. |
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10-23-2011, 02:03 AM
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Registered User
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plastigauge the bearings or risk doing it all over again after you fire it up.
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1979 928 85 Euro 2v motor,S4 Brakes and suspension, 1988 951 street legal track car(sold) Neon SRT4 track car |
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10-23-2011, 04:55 AM
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Shaggy
Red
Chumpy
Weiße Scheiße
1988 Porsche 951
The Kraut Burner
The Bratwurst Burner
Das Boost
Porsche 914
The tractor
