Got a line on a good running low km 2.8 its in a 85 firebird. Now I have a 89 camaeo rs . What the differences in the motors.

 

Do a quick bit of research first about "weak crankshaft" !

It has been mentioned here in several threads that the earlier 2.8 had a weak crank which was taken care of sometime in and around 1987 , ish .

The guys here have told me of other improvements to the later 2.8 such as better head porting also .

 

Ya I have read about the crank and oiling system but was not sure when they were upgraded. Visually they look the same other then belt set up

 

1985 could be a small or large journal crank . 1986 and up are large journal .

 

I think the general rule is, if it's MPFI, it's a large journal. I might be wrong about that though.

 

Flywheel Balance.........

 

The 85 will have v belts & the 89 will have a serp. belt system. If you want to retain whats on your original motor you'll have to swap over the water pump, timing cover & the oil pan.

 

86 was the mix year, I got large journal, MPFI but Vbelts.

 

Thanks for the reply everyone. Deal fell through. Guy had pulled motor and had pulled parts from it. Was not willing to pay good koney for a motor I had know way to run some tests on