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96 Impreza 2.2 and 01 2.2 mix and match?

Posted: Mon Sep 27, 2021 11:34 pm
by greg donovan
Currently have 96 2.2 with poor bottom end and a 01 2.2 with poor heads.

Can I replace my 96 short block with the 01 short block?

Using the 96 heads, intake, exhaust and everything that goes with it.

Re: 96 Impreza 2.2 and 01 2.2 mix and match?

Posted: Tue Oct 05, 2021 7:41 am
by mike-tracy
The phase 2 short block will physically bolt to the phase 1 heads.

The question is head gaskets. I would personally put phase 1 head gaskets on that combo. But you'll want to ensure they don't block off any cooling ports.

Re: 96 Impreza 2.2 and 01 2.2 mix and match?

Posted: Thu Oct 07, 2021 5:27 am
by greg donovan
Makes sense about gaskets.

I was concerned about piston and valve clearance.

Wonder if it would be an interference motor or not afterwards?

Re: 96 Impreza 2.2 and 01 2.2 mix and match?

Posted: Thu Oct 07, 2021 5:12 pm
by mike-tracy
I'm sure it will be interference afterwards.

A friend made that combo and had very light valve to piston impact marks with the thinner phase 2 head gasket. He swapped out to a thicker phase 1 gasket and that engine has been going for years.

Re: 96 Impreza 2.2 and 01 2.2 mix and match?

Posted: Thu Oct 07, 2021 8:28 pm
by greg donovan
Good to known

Thanks!