 Plastigage tolerance, what am I looking for? |
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| VaccaRabite |
 May 14 2009, 12:40 PM
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En Garde!  Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region  |
I need to use plastigage on my crank to see what the clearance is.
What am I aiming for? How much is too much? Zach |
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| Jake Raby |
May 14 2009, 06:55 PM
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Those specs are worthless!! They give a full five thou of tolerance and a 914 engine with .006 main and rod bearing clearance will have ZERO oil pressure!!
Look for a max of .003 on the mains and .0025 on the rods, I like even less than this... And plastigage is NOT a precision measurement device.. The only way to do this is with a micrometer and a bore gauge... If you send the parts to me for balancing we'll do it for you. To check the main clearance the bearings have to be installed into the case and the case has to be torqued.... |
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Posts in this topic
Vacca Rabite Plastigage tolerance May 14 2009, 12:40 PM
SLITS Haynes .... Page 11
Mains ... #1 & #3 ... 0.0... May 14 2009, 12:59 PM charliew Or you can use the plastigauge and try to learn ho... May 14 2009, 09:52 PM DBCooper +1 May 15 2009, 04:04 AM aircooledtechguy I've been using it for years.
Plastigage May 15 2009, 09:05 AM
aircooledtechguy Oops, hit the button twice May 15 2009, 09:06 AM |
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