It’s been a long time since I've been on here, but hoping to ‘tap in’ to the collective wisdom to work through a problem with my son’s first car.
Long post (sorry) but trying to give as much info as possible…
1996 Discovery 300Tdi that has been off the road for 8+ years (was my Father In Law’s). No mechanical problems at all at the point it was parked up, but lots of corrosion that we have now repaired.
Noticed while running it around a bit before the MOT that it was running a bit warm, radiator was in pretty terrible condition so replaced it and the thermostat with new parts. Seemed to be better on temp, but couldn’t get any heat inside so assumed there was an airlock that we hadn’t got out. Had to take for MOT slot (only a few miles) so drove it there, but on the way it shot out a core plug and lost all coolant.
Replaced core plug (and passed MOT!!) and spent lots of time trying to bleed - got lots of air out and seemed to get heat inside/out of the heater matrix pipes so considered in ‘job done’.
My son drove to work and it overheated a lot on the way. When I got to it there was lots of pressure in the header tank (even when cold) so assumed head gasket failure. Local specialist confirmed and skimmed head and replaced head gasket.
On journey home still had temp fluctuation, assumed it was air so spent a few days on and off bleeding it and testing. Eventually took it back and water pump had failed (impeller completely fallen off).
Water pump replaced and now getting good circulation through the heater matrix etc. but still suffering from temperature fluctuations under load - gauge will go to the top of the white area when driven harder, and come back down again when idling (or even just driving slower).
Tried bleeding it lots of times following LR manual process and others (including unbolting the header tank and raising it up), but not getting anywhere. Have also followed Lynall's method as posted previously here.
Not ruling out head gasket failure again (given it may have gotten really hot again with failed water pump), but doesn’t seem to be excessively pressurising this time.
Any ideas?
Thanks
Long post (sorry) but trying to give as much info as possible…
1996 Discovery 300Tdi that has been off the road for 8+ years (was my Father In Law’s). No mechanical problems at all at the point it was parked up, but lots of corrosion that we have now repaired.
Noticed while running it around a bit before the MOT that it was running a bit warm, radiator was in pretty terrible condition so replaced it and the thermostat with new parts. Seemed to be better on temp, but couldn’t get any heat inside so assumed there was an airlock that we hadn’t got out. Had to take for MOT slot (only a few miles) so drove it there, but on the way it shot out a core plug and lost all coolant.
Replaced core plug (and passed MOT!!) and spent lots of time trying to bleed - got lots of air out and seemed to get heat inside/out of the heater matrix pipes so considered in ‘job done’.
My son drove to work and it overheated a lot on the way. When I got to it there was lots of pressure in the header tank (even when cold) so assumed head gasket failure. Local specialist confirmed and skimmed head and replaced head gasket.
On journey home still had temp fluctuation, assumed it was air so spent a few days on and off bleeding it and testing. Eventually took it back and water pump had failed (impeller completely fallen off).
Water pump replaced and now getting good circulation through the heater matrix etc. but still suffering from temperature fluctuations under load - gauge will go to the top of the white area when driven harder, and come back down again when idling (or even just driving slower).
Tried bleeding it lots of times following LR manual process and others (including unbolting the header tank and raising it up), but not getting anywhere. Have also followed Lynall's method as posted previously here.
Not ruling out head gasket failure again (given it may have gotten really hot again with failed water pump), but doesn’t seem to be excessively pressurising this time.
Any ideas?
Thanks
