range rover overheating

HELP!!!!!!!! just changed the rad on my 95 4.0 range rover got the air out and the car sits half way on temp gauge at idle i can drive it miles its fine but as soon as i put the heater on in the car fully up the car starts to overheat when i turn the heater off it goes back to half way any ideas thanks

Its probaby fooked... get a sniff test done

the only way to check rad for your fault is to feel core of rad all over to make sure its hot all over colder parts arent cooling could be head gasket could be cracked block check entire system is full with coolant

oh great all i needed to hear what would u suggest in worse case new engine?

thanks for that had that done there is a slight misfire at low revs too

worst case scenario youll have to replace stripped motor ,but check first could be poor rad lpg leaking in from vapouriser ,head gasket ,water pump etc

change yo usercp to show where yu are, someone might offer to help.

why did you change the thermostat? was the old one missing?

well not really a mechanic but know a little after i had rad checked thought id try the thermostat but i have no white smoke no oil in my water no white gunk on my oil filler cap not sure what it is heater in car still coming out hot when i take water tank cap off the water bubbles out

check rad youself they will onlky check it doesnt leak not cool efficently

May be you've just got an airlock after changing the thermostat then -- I believe they're notoriously tricky to get all the air out.
I think if you search on here, you'll find a few techniques to get the air out.

yeah have been told that before hoping that all it is

Have you had a sniff test yet?... Takes a couple of mins , it will check the pressure in the system also. You need to start eliminating ASAP.

overheating + misfire = liners or if your lucky head gaskets sorry to be the bearer just personal experience

you MUST check the small return pipe on the top of the rad to the header tank is totally clear both ways. blockage is a common fault, this will cause rapid overheating if blocked.simply detach rad end and blow and vice versa obviously when cold to avoid scalding

Thank you wil2813 will give that a try

Get a sniff test done to rule out head gasket or block. Then go and buy a new radiator. You can get them off ebay for less than £100. The cooling system on a Rangie is so fickle that as a rule of thumb I always install a new raditor for piece of mind. When I changed out the one on my '99 it weighed 1.7Kg more than the new one. All manner of crud came out of the old one.
As #jamesmartin says most places will only check them for leaks and not cooling efficiency.

oh **** this sound expensive hope the car was mega cheap cause if you cant fit a new engine yourself its gonna cost lots in labour alone