Thread: still fouling plugs

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Originally Posted by DennyW

Now you gave it away. Yes, your valve guides are loose. That's your problem !!

He said the heads are new . Maybe the seals are damaged ? But you would think that the new guides would stop most of the oil .

I know that on my 1989 pick up it smokes on the start up . And for sure the valve guides are worn . but its getting up in miles to . Maybe his forged pistons have some blow by on start up till they warm up and expand .

Originally Posted by DennyW

New things can be bad also. From his discription, that is a common valve guide problem. If it was seals, believe me, that thing would smoke more than just start up, and then, not clear up after the start.

((I pushed the seals back down))

New/Means= New to him, said they were new, could be new, but worked, or reworked incorrectly. Kind of like someone saying it is a rebuilt motor.

Not rebuilt.Brand new heads.And the seals on some of the valve stems were up on the stem after running awhile not down where they should stay but not on all the valves.They are the positive stop seals.