Tks for all the help, I got the new hitachi compressor in and the larger rear hose spiced. I found that this also had another hole due to rubbing against another part. This made it necessary to cut the hose off a lot higher than I wanted to and made the slice difficult. It took some work and some skinned knuckles but I got it in. I had to bend the hose a bit but I don’t think it is kinked.

When I first started the car the compressor ran like it should. I started the car and let it run 30 seconds or so several times so I didn’t over heat the thing reairing the entire system. After that I just let it run. It took quite a long time but finally shut off. Then I called it a day.

The next day I started the truck up and it ran for a while, not sure but probably a couple minutes. I plugged in the gap tool, cleared codes and none returned so in good shape there.

I then raised the truck from standard to off-road height to see how the system would react. The truck went right up without delay. But the compressor then ran for about 2.5 minutes which seems excessive. So, it seems that the compressor is working, but taking a long time to refill the reservoir.

Suggestions on what to look at next? I’m afraid that the compressor running so long is not normal and will wear our prematurely.

tks

 

I would replace the valve block seals.

 

I've been following this post with great interest. Thank you!

Would you do the center valve block also? I've seen lots of mention of front and rear but coincidentally realized last night that I hadn't hear much about the center distribution block. I bought a 2008 SE V8 2 months ago with the eventual intent of driving the Pan American through South America. My car has 100k miles and a Southern California car so pretty damn clean. It has two newer front shocks and an AMK compressor of the 1st AMK generation so probably 5 to 10 years old. I was thinking I would rebuild or replace the compressor and all the valve blocks so I know what to do if anything fails when down there. Thanks again and any thoughts or suggestions appreciated.

 

The seal kit does all 3 valve blocks, AMK cant be rebuilt but you can replace the drier desiccant.

 

Update:

Started up the truck after 3 days of sitting and timed the compressor. It took 1.5 minutes to reach 258 psi in the gallery and then shut off. The truck had dropped somewhat over time so it did take some air to get it back up to standard hight. Not sure why it dropped, self leveling or leaks but that is my next step, pulling fuses, measuring, etc, after I’m confident the compressor is working as it should.

I then went to off road hight and timed the compressor. It ran for 1.75 minutes.

Are these times for the compressor running reasonable?

 

They seem reasonable to me....

 

Great Tks. Feels good to have completed a project myself.