Plenum Pull Advice, Starter Rebuild, MAP Sensor Info

[mgbrv8]

Oh by the way for those that haven't rebuilt a A/C compressor I found a couple good videos while I was looking up the clutch bearing part numbers that are very helpful for anyone doing it for the first time. A quick note if you don't have good head pressure it is likely that you compressor has lost enough oil over the years that the pistons are worn out but there is still a chance that its just debris on the valve plates causing weak compression.

Video 1
http://www.youtube.com/watch?v=CD5lLC5v6PE

Video 2
http://www.youtube.com/watch?v=MangGmPZc6g

[Coupe89]

Originally Posted by mgbrv8

Oh by the way for those that haven't rebuilt a A/C compressor I found a couple good videos while I was looking up the clutch bearing part numbers that are very helpful for anyone doing it for the first time. A quick note if you don't have good head pressure it is likely that you compressor has lost enough oil over the years that the pistons are worn out but there is still a chance that its just debris on the valve plates causing weak compression.

Video 1
http://www.youtube.com/watch?v=CD5lLC5v6PE

Video 2
http://www.youtube.com/watch?v=MangGmPZc6g

Doesn't look that hard

[mgbrv8]

Originally Posted by Coupe89

Doesn't look that hard

I know right, a friend of mine that owns a Porsche 959 was in a bind because his compressor had a special backplate and those compressors are next to impossible to find and the ones you do are big $$$$. After we rebuilt his I have not bought a new or rebuild compressor since. The only thing that I would add to the videos would to not touch the front seal with your hands because the human oils cause pitting in the carbon seal over time. Also if your pistons are worn you can order those too.

Dave

[mgbrv8]

My A/C clutch wasn't in bad shape so I replaced the bearing and lightly sanded the faces, now a point that needs to be made is that most clutches that fail can be easily remedied if attended to immediately there is a lip on the pulleys that catch dust and wear material over time this buildup can reach the clutch disk slowly taking pressure off the mating surfaces until slipping occurs, so by cleaning that area with sand paper you can extend your clutch life.

Dave

[mgbrv8]

Well My r12 oil came in today so I was able to crack open the compressor. Now a point I need to make is that all components when I removed I washed in hot water and Dawn soap And then dried thoroughly with a rag and compressed air I washed everything except for the piston and cylinder Assembly. I cleaned all of the Mating surfaces and vave plates And put a light film of r12 oil on everything after cleaning. I then assembled all the components once cleaned and installed the bolts only tightening them finger tight. When the bolts began to bottom out I would move them clockwise counterclockwise to try to force as much oil out of the bottom of the threads as possible To avoid hydro-locking oil in the cavity causing a crack. Once the assembly was together I placed my thumb over the intake port and could feel a strong vacuum that was stronger than it was before disassembly.

David

[mgbrv8]

Some more Pics

Dave

[Dynomite]

I said this before....this (this thread) is some good technical information with great photo coverage
Keep up the great work Dave......it is appreciated

[mgbrv8]

Thank you Cliff all I want is to help the brotherhood

Dave

[mgbrv8]

All assembled and torqued and ready to cool, now all I need to do is flush all the lines put new orings and we are ready to Vacuum the system down.

Dave

[Corbusa]

DittO