noreply@invalid said:
From a previous posting, I have a smell in the coolant res, it is either
petrol or it is exhaust gases.
My nose and that of others tell me the smell is petrol not exhaust fumes.
Is it possible to get petrol in to the cooling system.
I can't think how, offhand.
My basic test for bad head gaskets (or cracked/warped heads) is to remove
the coolant pressure cap when the engine is cool, clamp the overflow hose if
applicable, and place my hand over the opening I removed the cap from while
somebody starts the engine. If you can feel the pressure change as the
engine cranks, and if pressure builds up when the engine starts and returns
if you let the pressure "burp" the chances are high the head has to come off
to see why. If it passes that test, the next stage is to have the helper put
the transmission in gear, slip the clutch a bit if a manual, and with the
helper standing on the brake (and you standing beside the car, not in front)
repeat the test. If still no pressure build-up, you can rest easier about
the head and head gasket.
Mike
