As some of you will remember, my P38 has been using coolant for a long time. 5+ years. It was also pressurising the cooling system and showing signs of coolant in the cylinders (some of the plugs were stained orange). It has however never actually overheated, so long as you keep it in water.
It seemed to be a multitude of issues, leaks in the engine bay pipework, leaks from the water pump, leaks from the heater core orings as well as dodgy head gaskets.
I took everything apart in the summer, gave it new headgaskets, new water pump, new heatercore orings and replaced every coolant hose on the engine. Removed the horrible T-pieces feeding the LPG and rerouted that to be fed from the throttle heater loop instead. Basically ticked every box in the "fix your P38 v8" hot list...
Except, its still using coolant, and still pressurising the coolant system. The top rad hose is properly solid after the engines warmed up, feels like pressing on a car tyre. I've got a leak on the hose on the inlet manifold that goes to the LPG vaporisor that i cant seem to stop, i've already striped one jubilee clip from tightening it up that much trying to stop it. This morning when i got in i noticed red drips all over the side of the centre console carpet and some contorting later it would appear the new heater core o-rings are leaking.
It seems to be leaking LESS than before, which i guess is something, but i'm getting somewhat pissed off with it now.
The interiors in bits as i didnt want to refit all the plastic trims until i'm sure the leaks are sorted. Its also mouldy and horrible inside as both footwells and the boot are damp... The wife tried to use it yesterday while i was at work to find the child seat was covered in mould-fur. So that had to get stripped down, bleached and put thru the washing machine...
Any ideas beyond getting rid and buying a Toyota?