Thread: Slow a/c on D4

Once this happens you are up for a very expensive new compressor as changing the valve very rarely fixes it fully. I have had two compressors in 300,000km due to the same fault. Before the second one I changed the VD valve, which only helped for a short time and even then it didn't work at peak efficiency. The compressor is very difficult to access and not a nice job.

Had my AC regassed and checked as a preventative measure. No leaks found. Refrigerant charge was at <70%, not sure if the dye+gas+stop leak has negatively impacted my 10yo AC system...

Originally Posted by josh.huber

I'll gut my compressor when I change it and report on what I find

I want to know how you get it out at home. Do me a write up!

Originally Posted by DiscoJeffster

I want to know how you get it out at home. Do me a write up!

Voila

How to replace AC compressor on Land rover discovery 3 2007 turbo diesel - YouTube

+1 for me, would be interesting indeed.

Originally Posted by PerthDisco

Voila

How to replace AC compressor on Land rover discovery 3 2007 turbo diesel - YouTube

Lol, 10 hours No need for any coolant hose removal, and there is a couple of differences on the 3.0 litre
Fan and belt off
Wheel arch liner off
Upper control arm off
heat shields off
intake and boost pipes off
front lower plastic cover off
connector for variable displacement valve disconnect
other visible connector disconnect
pipes off
remove bolts for compressor
disconnect remaining connector
remove

reverse for refit

Bout 3 hours to do the job, maybe 4 or 5 for first time , but check the plastic coolant outlet isn't leaking while compressor is out as this is a good time to replace it

enjoy

Originally Posted by Eric SDV6SE

Had my AC regassed and checked as a preventative measure. No leaks found. Refrigerant charge was at <70%, not sure if the dye+gas+stop leak has negatively impacted my 10yo AC system...

Vehicle refrigeration systems leak. They have rotating mechanical seals, O-rings and the usual compliment of service valves. They leak. They _all_ leak. They leak less than they did 40 years ago, but then on the flip side they hold an awful lot less refrigerant.

A preventative re-gas every couple of years is more than a good idea. If you want your A/C to last, make sure it has enough gas to properly transport the lubricant. They will still "get cold" with enough of a deficit to cause impaired lubrication.

Originally Posted by BradC

Vehicle refrigeration systems leak. They have rotating mechanical seals, O-rings and the usual compliment of service valves. They leak. They _all_ leak. They leak less than they did 40 years ago, but then on the flip side they hold an awful lot less refrigerant.

A preventative re-gas every couple of years is more than a good idea. If you want your A/C to last, make sure it has enough gas to properly transport the lubricant. They will still "get cold" with enough of a deficit to cause impaired lubrication.

Fully understood, i guess i meant to say "the system had no significant leaks" issue i have is that the AC seemed better pre-recharge than it is now post "preventative measure" re-gas.