75 1.8 Heat Exchangers options, Compatibility with earlier 1.8 or 2.0 heat exchangers Options

[jesiv]

I need to replace one of my heat exchangers on my 1975 1.8. Will earlier 1.8 or 2.0 heat exchangers fit? Thinking the earlier exhaust would improve performance. Are they compatible, improve performance and is it worth doing?

Thank you for the help!

Cheers

UPDATED

[JeffBowlsby]

Wait OP had an original 76 1.8?

I thought it was well established that the 76 cars were only 2.0L, despite the factory owners manual that lists the 1.8L on its cover.

[jesiv]

Wait OP had an original 76 1.8?

I thought it was well established that the 76 cars were only 2.0L, despite the factory owners manual that lists the 1.8L on its cover.

You are correct. I mistyped. It is a 1975 1.8. Thank you for the callout. That being said I understand that in 1975 both the 1.8 and 2.0 including 76 2.0 all use the same exhaust.

Cheers

[wonkipop]

Wait OP had an original 76 1.8?

I thought it was well established that the 76 cars were only 2.0L, despite the factory owners manual that lists the 1.8L on its cover.

You are correct. I mistyped. It is a 1975 1.8. Thank you for the callout. That being said I understand that in 1975 both the 1.8 and 2.0 including 76 2.0 all use the same exhaust.

Cheers

not sure about that. using the same exhaust. have to look it up.

there might be differences in the 75 1.8s themselves depending on state sold in.
the california 1.8s used exhaust gas recirculation and the 49 states didn't.
and the californian 1.8s used cats while the 49 states did not.

its entirely possible that 49 states 75 1.8s ran an exhaust set up similar to 74 california cars. in other respects the 49 state 75 1.8 is for all intents and purposes a 74 california 1.8.

i'll check on that. i got into the edges of 75 1,8s when we were all doing research into the 74 1.8s a year or so ago. (IMG:style_emoticons/default/beerchug.gif)