Hi
I could do with some advice please.
Have replaced radiator with one from Europarts - also thermostat before Xmas as loosing coolant.
Discovered mayonnaise in radiator expansion / filler tank a fortnight ago.
A mechanic friend has fitted new oil cooler but there is still too much pressure in coolant system.
Car still runs smoothly without exhaust smoke.
Is my next step to have a sniffer test for head gasket troubles?
Or might it be a defunct water pump?
Before I learn how to take the head off !

Kind regards
FishingTed