range rover problem

[ade-5]

alright guys. last night on the way home my rangie kept cutting out looked under the bonnet and come to the conclusion the converter was frozen. so this morning run it on petrol untill it was warm then was gonna flip it to lpg. great theory. but he started overheating and split the pipe to the converter. and had no heating what so ever. makes me think its not passing through properly???? any help guys

[Tubbs]

The reducer is just a hollow chamber. So i would doubt its blocked. Depends on the system but it wont run on gas if you have no coolant flow. Or if the temp is too low, again depending on the system.

[Gilbertd]

Make sure the cooling system is properly filled and bled. It's not unknown for the small bleed outlet on the top of the radiator or the hose from that to the header tank to get blocked. With the hose off, make sure coolant comes out of the top of the rad. Blow through the hose with the header tank cap off and make sure it is clear too.

It is not a good idea to let a LR V8 overheat unless you have a lot of spare cash for a new engine.......

[ade-5]

just thought it was a little strange as it looks a brand new pipe and how its split right there nxt to the reducer. when she cut out last night it was pure white and looked frozen. but il trim it down top up the coolant and see how I get on

[LPGC]

Hope you get it sorted easily,

Worst case scenario, head gasket or cracked block / cylinder head. Have seen a few.

Simon
LPGC

[Gilbertd]

Frozen vap happens when there is insufficient, or no, coolant flow through it. Usual cause is not enough coolant in the first place. You MUST make sure the coolant is kept topped up. If you are losing coolant then it may be as simple as a slight leak from a hose or the heater O rings, it may be a head gasket on it's way out or it could be the dreaded slipped liner. If the cooling system is pressurising excessively so it is blowing coolant out, then it may be bad news. If the header tank cap is past it's best, it can allow you to lose coolant even at normal pressures. Stick a new one on (you don't have to buy the gold plated Range Rover one, it is the same as fitted to all 5 series BMWs and a local motor factor should do you one for around a tenner) to be sure.

[rossko]

Before engine changes etc. it's also smart to check that air locks or system pressurising aren't in fact due to gas leaking into the cooling system from an internal leak in the reducer. It's rare, but happens on some models. This can also fool mechanics who check for hydrocarbons in coolant, and if found prononounce gasket/liner failure.

If it's been happening for a long time, the propane may attack water hoses and seals ... but is very rare it gets to that stage before a warning.

[ade-5]

I cut down the pipe and topped up the coolant and so far looks good. no overheating or leaks

[Gilbertd]

Keep an eye on it, as I said, boiling a Range Rover V8 is definitely not a good idea. I've seen one that overheated causing the head gasket to blow. Unfortunately, the head gasket blew because the thermal expansion caused the threads for the head bolts to be pulled out of the block......

The earlier Classic Range Rover had a coolant level sensor so if you started to get a bit low, a light on the dash came on. For some reason, the P38 doesn't.