1980 Range Rover

[dunno]

Have problem with engine pressurising the cooling system resulting with the discharge of all coolant in about 15 minutes.
Head gaskets have been replaced but didn't fix the problem.
Any ideas on where to from here would be appreciated.

Thanks
Dunno

[dungarover]

Bloked radiator or a dodgy thermostst, either of these can cause your overheating woes. Was the water pump replaced when you had your heads done?

Just a couploe of ideas to get you started. Radiator sounds like it's the issue, it's happen to me before :(

Trav

[Ralf_the_RR]

Radiator cap?

[fernockulated]

could be numerous probs,what was the original reason for the head gasket replacement ,if it was a previous o/heating prob,did you get the heads machined while they where off,possible warped/cracked heads resulting in pressure into the system

do you run thermo fans or normal,if thermo check the operation (and direction,dont laugh ,thumpers was running backwards when i bought it!!!!!!) of the thermostat

other than that what Trav said above:cool:

[p38arover]

Have problem with engine pressurising the cooling system resulting with the discharge of all coolant in about 15 minutes.
Head gaskets have been replaced but didn't fix the problem.
Any ideas on where to from here would be appreciated.

Is it also overheating?

Ron

[kie4]

Have problem with engine pressurising the cooling system resulting with the discharge of all coolant in about 15 minutes.
Head gaskets have been replaced but didn't fix the problem.
Any ideas on where to from here would be appreciated.

Thanks
Dunno


Where is the coolant going?
into the oil?
if so front cover gasket has failed.

[dunno]

Thanks guys. Water is not going into oil its just pressurising the cooling system forcing coolant to blow past radiator cap. Heads were not machined when gaskets replaced and I suspect possible cracked head.

You have given me a few extra avenues to check prior to pulling motor down again.

Dunno

[Rayngie]

just had the same problem on my 92 Classic, around town it was perfect, on motorways it shot through water like nothing on earth.

no water in oil or vice versa, no visible leaks, water was moving around fine, radiator o.k, temp did'nt go up

Had a mechanic look at it under pressure, when the engine got up to top temp and max pressure, two heater hoses were split and would let water out in large quantity, hence, whenever i ran the engine at idle, no water came out anywhere, so it was only happening under max pressure which is very hard to check for yourself.

Get someone to check it if you can, i thought it was a gasket, but nope, much simpler fix.....very happy now.