Series one swap.
Got a 93 park avenue with the series one 3800. I ran the motor dry on coolant, changed the head gaskets and had the heads planed and checked for leaks. I put new head gaskets in, and head bolts, along with the rest of the top end. The motor ran good for a few days, now its got low compression in cylinder one, and a bad miss that pretty much shakes the car at idle. It smooths out under acceleration, but its rather shaky in OD at 80 kph, but smoother at 100 kph.
Motor'* got 367,000 kms. I have a 91 lesabre just sitting unused, with the same 3.8. Its got arounds 140-150,000 kms i changed it years ago due to a blown rod with this current motor.
I wonder if these engines are pretty well interchangable aside from switching a few parts? Intake and plenum will definitly have to be switched, the PA has a plastic intake. Noticed how it was different from the series 2 plastic intakes, the egr on the series one is well sleeved and away from the coolant. Can I bolt up my PA exhaust manifolds to the 91'* motor? That and aside from the mounts, the heads should basically be the same?
2009 Pontiac Vibe AWD 2.4
1993 Buick Park Avenue 3800
1984 Chevrolet Citation 2.5 liter four.