Just picked up a ‘new’ 95 XJ6 and the heat is sub par I assume the Aux pump is bad. Has anyone rebuilt or used another type of pump in the XJ ? There seem to be a number of them for both Brit and german cars.
It probably is the brushes inthe Aux heater pump have worn and need replacing. Lots in the Archives it’s the same for both X300 & 308.
See: http://jimbutterworth.co.uk/8jagpump.htm
You don’t need to drain the coolant as you only loose about an eggcup full.
You’ll need to file the replacement brishes to size, the whole job took me about 1.5 hours to complete.
The X308 pump is the same, although the mounting is different. You can zip tie one in to work.
Rob