difference between 85 and 89 2.8
#1
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Car: 89 RSt-top
Engine: 2.8 mpfi
Transmission: auto
difference between 85 and 89 2.8
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.
#2
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Re: difference between 85 and 89 2.8
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 .
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Car: 89 RSt-top
Engine: 2.8 mpfi
Transmission: auto
Re: difference between 85 and 89 2.8
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
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Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: difference between 85 and 89 2.8
1985 could be a small or large journal crank . 1986 and up are large journal .
#7
Re: difference between 85 and 89 2.8
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.
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Car: 89 RSt-top
Engine: 2.8 mpfi
Transmission: auto
Re: difference between 85 and 89 2.8
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
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