Quote:
Originally Posted by mechanicalman
How many years did it sit? Did you pull the plugs and read them, is it all the cylinders or less? Maybe one, or three seals were not installed correctly or maybe they left them off altogether.
If it's only on start-up that would, IMO, eliminate intake gasket leak (oil sucking into the ports).
Another thing to consider, there was another 290HP SB crate engine before the most recent one, it had centerbolt valve covers. It was a 1 pc seal, a much better engine than the recent one. Which one do you have?
The older version of the 290HP was identical to the 300HP. It had a dish piston shortblock with small chamber Z28/formula 350 style heads, flat tappet cam similar to the later 290 but less intake duration and 112 lobe centers.
|
It is the later version has the four bolt rim secured valve covers. I had it
about 5 years still plastic wrapped in factory shipping cradle.
I only pulled a few random plugs which are clean ,no oil build up, but I will pull all
there may be one or two seals out or pintched. I think the intake manifold
might be worth redoing as there is a very light blue exhaust mist at idle.