Overheating Rover

[Ken.p]

My brother owns an "M" reg 418td Rover, which has started to overheat & develop what seems to be back pressure in the expansion tank. He has changed the radiator (it was falling to bits) , changed the water pump & checked hoses etc. The overheating seemed to start just after he found a small water leak under the car. Can anyone help he's at his wits end.

Thanks

 

[gman76]

Thermostat?

 

[Ken.p]

Sorry should have mentioned but he's replaced that as well.

 

[jj4091]

Long shot,don't mean to insult you , but is the head gasket ok? Oil milky?

 

[Ken.p]

There's no oil in the water & no milky deposit under the oil filler cap. We have been swaying to the fact it could be the cylinder head though.

 

[jj4091]

You need to pressure test each cylinder then, if the water is leaking out I would have thought you would loose compression as well even if water is not getting into the cylinders.