Mud-club

Vehicle & Technical => Range Rover => Topic started by: petergalileo on February 20, 2007, 16:37:29

Title: 4.6 V8 P38 Overheating problems
Post by: petergalileo on February 20, 2007, 16:37:29

Got an M reg P38 and the damned thing overheats like crazy.  I have replaced the viscous coupling, flushed out the rad, Flushed out the engine.

Still overheats ! I am guessing its an airlock as it was a real pain to get the top hose full of water.  Any quick tips for bleeding it ?

Thanks

Title: 4.6 V8 P38 Overheating problems
Post by: Range Rover Blues on February 20, 2007, 16:45:05

Thermostat? head gasket?

If all else fails try loosening the hose clip and let the air out that way.

Title: 4.6 V8 P38 Overheating problems
Post by: petergalileo on February 20, 2007, 17:25:54

Thermostat is fine, dont think its blown a head gasket as there is no other symptoms.  I am not actually sure the coolant is circulating though but not sure how to test that.

Title: 4.6 V8 P38 Overheating problems
Post by: Range Rover Blues on February 20, 2007, 17:27:07

Does the rad get hot, if not then it's not circulating, check the pump hasn't fallen off.

Title: 4.6 V8 P38 Overheating problems
Post by: petergalileo on February 20, 2007, 17:46:08

LOL yes the rad does get hot I am thinking this is an airlock maybe

Title: 4.6 V8 P38 Overheating problems
Post by: agent006 on February 20, 2007, 18:38:19

http://rangerovers.net/newrremedies.htm#cooling

Might help.  Personally i'd get it to a garage ASAP as overheating a 4.6 is a very quick way to slip a liner.

Title: over heatin
Post by: tomcat on February 20, 2007, 19:28:45

hi
  the 4.6 was - is famous for cracking the block mainly in the bore or poss head gaskets, needs pressure testing to be sure or the cooling system sniff test using chemical dye to check for the presence of exhaust gases in the cooling system this would confirm cracks or gaskets good look...
                        regards john t

Title: 4.6 V8 P38 Overheating problems
Post by: Range Rover Blues on February 20, 2007, 19:36:40

A really stupid thing just occured to me, but it happened to a guy I know.  Big overheating probs with a TDi, had the head replaced, tried a nes xicous hub, pump lots of bits. One day he discovered by chance that the fan was blowing into the rad rather than sucking :shock:

Some later serpentine belted engines had RH fans rather than LH fans, thing is his had a RH threaded viscous hub and a LH fan :roll: