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Boston Mangler 11-05-2001, 02:34 PM hey guys what would be a good indication of bad valve seals?? i am getting blow by but my spark plugs are dry and look normal thanks hy_desert_4wheeler 11-05-2001, 04:09 PM Blowby is the result of worn rings not valve guide seals. Worn valve guide seals will cause the engine to smoke on start up and deceleration. From your description sounds like your compression rings have given up the ghost while your oil rings are still keeping the oil out. Boston Mangler 11-05-2001, 04:41 PM thanks i did a compression test and got 135 135 100 135 head gasket or ONE smoked cynlinder? What is the PSI supposed to be? Thanks hy_desert_4wheeler 11-05-2001, 06:53 PM Normal is between 155 to 185psi with a max allowable variation between cylinders 0f 30 psi according to the manual I have. The low cylinder is not low enough for it ot be a blown head gasket so my guess would be worn or busted rings or busted piston. the only way to be sure is to pull the head. mike 11-05-2001, 09:06 PM Originally posted by Boston Mangler thanks i did a compression test and got 135 135 100 135 head gasket or ONE smoked cynlinder? What is the PSI supposed to be? Thanks For starters pour about a tablespoon of 30wt down the low hole then do another compression test on it. If it raises it's definatley the rings. | |