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Neither, Porsche Pink!

Zerex G05 is good.

I know the amount of oil the compressor and system holds for R12. However, is this the same amount for the same system converted to R134a?

YES, with conditions: You should only replace the same am ...

Your original post has me confused.
You are chasing a bad relay under the dash and guess the control knob isn't working, but you state that when you added refrigerant, you could hear a hissing noise ...

I'm reposting this from Pelican Forum:

First, go here and download the workshop and parts manuals, drawings will help you sort out locations and part numbers:

Porsche 944 manuals - Free download ...

You may want to get a sample or inspect before buying.

I don't think that's the original material and if you're settling on non-Porsche OEM material you could find it cheaper elsewhere.

Surprising that the evaporator lines are leaking, but anything is possible. Usually it is the front compressor seal that wears and leaks.

1. Don't use any kind of leak stopping additive, the fix li ...

Rasta, take a look at the CoverKing SilverGuard Plus.

Plus Pelican has 17% off right now: "COVER17"

It has fleece on the inside, and has an aluminized outer coating to reflect infrared ...