Hi,
Can anybody help i have a disco 2.5 tdi and i have a noise coming from the engine that sounds like a loud ticking noise i have checked all the usual stuff such as alternatore ect the noise is defenatly inside the engine block. do you think it could be the head gasket that has gone?
I have no oil in the water and no water in the oil and the disco runs smooth with no loss of power but theres this dam noise.

Please help i would be grateful for your ideas

also check yer vacuum pump.