A/C Compressor replacement

[Bob Eyres]

We’re trying to change out the original compressor on my 91” with a new one. I got a 93” unit (new) from Rockauto. That’s set up for 134, But the old manifold that bolts to it will not seal because of a different O ring configuration.
Does anyone know where I can get a new manifold/ hose Assy. that will mate the 93’ compressor with my 91’?
Or some other solution?
TIA


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[jss06c6]

Bob,

Do you have your '91 compressor still? I moved the '91 "manifold" to the newer 134 compressor without issue. Can you do this?

Steve

[jss06c6]

I may not be understanding the problem.. Do you have any pics? I just did this and moved my '91 manifold to my 134 compressor..

[gtcollins@maxnet.co.nz]

Hi I have a 1990 that do you have to do when changing from R12 to R134A
Thanks Glen

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[Bob Eyres]

Sorry for the delay in responding.
We managed to mate the new compressor, a Delco unit from Jerry, and it’s installed.
But a new problem cropped up. After the new serpentine belt was installed and the engine fired up there was a mismatch between the compressor pulley and the belt location. Once you revved the motor, it engaged the compressor clutch, the rear edge of the belt started to rub on the pulley. It ate about 3/16” off the edge of the belt. Misalignment sure, but why? It’s a new Denso r134 compressor, in place of the old r12 unit, with a new clutch from Rockauto.
Anyone else have this problem?


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[jss06c6]

??, I took the clutch and pulley off of my R-12 compressor and put it on my R-134 compressor.. belt runs true..

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[A26B]

Bob,
It’s not uncommon for ZR-1, LT5 (VIN J)specific parts to be listed incorrectly as sharing fitment with base engines (VIN Y). What you have is a clutch for a base engine(VIN Y). They look the same but the offset is not right for the LT5.
The problem you have is not new & has been experienced many times before.


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[A26B]

??, I took the clutch and pulley off of my R-12 compressor and put it on my R-134 compressor.. belt runs true..

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Yes, the alignment issue is in the hub of the clutch, not the compressor.


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[Bob Eyres]

That’s what I was suspecting. Thanks guys I’ll be on the phone to Rockauto today


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