Did a bit of maintenance to mine today. A few days ago when summer arrived for a day or so, the AC seemed intermittent and would work better when it wasn't needed than when it was. Clutch failing to engage in warmer weather is usually a sign of the air gap being too big, and it was. A test for this is to put the HEVAC on Lo and look to see if the clutch has engaged. If it hasn't, a tap with a screwdriver handle will cause it to pull in. If it is only slightly too large, there's a shim behind the cover that can be taken out to get the gap back to where it should be. Tried the screwdriver tap. It pulled in but wobbled around all over the place. The air gap, which should be between 16 and 31 thou, was considerably larger than that and, pulling the front off showed it was so badly worn that while the gap looking at it from the outside was around 50 thou, it was so badly worn it was near double that at the mating faces. A quick look on eBay found a complete compressor for £35 so bought that and it arrived this morning.
Took the front cover off the replacement and it was fine, so was the face of the pulley where it engages. So out with the circlip and off with the pulley. Doing the same with the compressor still on the car isn't quite as easy as there's things like the PAS reservoir and a radiator in the way. PAS reservoir is easy enough but didn't fancy taking the radiator out or degassing and regassing the AC system (even though I've got the kit for doing it) so I could get the compressor off, so struggled a bit with the circlip. But once that was out, the pulley came off, replacement fitted and, even with the shim, measured the air gap at 22 thou so all good. Put the AC on Lo, and stuck my AC installers calibrated thermometer in the dash vent and ran it for a couple of minutes. Air out of the vents at 0.9 degrees C says to me that it's working as it should again......
Peterborough, Cambs
- '93 Range Rover Classic 4.2 LSE, sold
- '97 Range Rover 4.0SE, in Oxford Blue with a sort of grey/blue leather interior sold as two is plenty.....
- '96 4.6HSE Ascot - now sold
- '98 4.0SE in Rioja Red
'98 Ex-Greater Manchester Police motorway patrol car, Range Rover P38 4.0, in Chawton white - the everyday car
All running perfectly on LPG
- Proud to be a member of the YCHJCYA2PDTHFH club.