Tuesday, January 18, 2011

P38 LIKE TO GET DOWN

If the Range Rover is slow to rise it’s either the compressor falling to generate enough pressure, or the air reservoir emptying it’s easy to tell which one with the vehicle on a stand, slowly undo the drain plug on the air tank under the right hand sill unit the air starts to escape.
When it’s empty, tighten the drain plug back up, then start the engine. Leave a door open to prevent runs. It should be six to eight minutes much longer than that and the compressor is on its way out and should be replaced or serviced. You can buy new compressors, but rebuild kits are available via some internet sites.
If the compressor checks out on this test, you probably have a slow air leak. That’s harder to track down. Start with the two joint faces in the valve block. Spray with soapy water to see if you can find the leak. If that doesn’t show it then you’ll need to work your way along the air harness, which is a tougher job.  If the leak is from the valve block it’s fairly easy to remove it and replace the O ring in the problem area.

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