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73-87 Chevy _ GMC Trucks => Interior & Equipment => Heating, Ventilation & Air Conditioning (HVAC) => Topic started by: Harmon on July 25, 2017, 12:06:23 pm

Title: 86 C10 AC Compressor O-Ring question
Post by: Harmon on July 25, 2017, 12:06:23 pm

Hey all,

I have an 86 C10 that was originally a 305 engine.  I am putting a new AC compressor on.  The new one has a different style O Ring connection on the back of the compressor. 

I am aware there are two types.  The one on the truck has the O Rings already in the compuressor while the new one does not.  My new one also did not come with any O-Rings. 

My question is does it matter what type of compressor goes in based on the O-Rings?
I am not totally sure if the old compressor is even the correct one for truck.  So how would I know which compressor would be best?

At a stand still, thanks for reading/helping.

Title: Re: 86 C10 AC Compressor O-Ring question
Post by: bd on July 25, 2017, 01:27:45 pm

Post pics of the hose manifold and the pressure/suction ports on the back of both compressors, clearly showing the o-ring grooves and seats.