Amici,
This isn't really Triumph related (other than its a tow vehcile!) but I'm
looking for guidance on an engine problem.
We had an engine rebuild in our Jeep last spring and over the
course of the next year we had over heating problems, lack of power
and apparent blow-by.
We took it back to the rebuilder multiple times to try and get the
problem(s) corrected. Never did have much luck. However, trying
to get past the state emissions test last month this almost new motor
failed miserably.
Here are the apparent symptoms. OIl in the air cleaner coming from
the valve cover. Compression check shows approximately 140-145
across all 8 cylinders at first. However on the 3rd revolution of each
compression check (which is what the manual says to check for) the
pressure drops to 115-120 but comes back up to 140-145 on the 5th
revolution.
This doesn't sound like a piston ring problem to me. It would seem
to be more of a bad cam. The cam shaft was replaced, the heads
were given valve jobs. Basically it was a complete engine rebuild.
Any thoughts on what to look for? Should he just pull the heads and
cam on the assumption that the rings are probably ok? Or does this
sound like a ring problem AND a valve/cam problem?
Any help on this would be greatly appreciated!
Thanks
Brad
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