Join Date: May 2009
Car: OBW H6 VDC, H6 OB Sed, XT6's
Feedback Score: 1 reviews
there's no reason to suspect headgasket. if you suspect leaking coolant due to smell - the first logical step is to check for coolant loss - are you loosing any coolant? if it's leaking then your level is going to drop. start there.
if you're loosing coolant you need to find out where it's going. after a quarter million miles (traveling to the moon) it's not hard to envision a hose or clamp needing replaced or a leak in a radiator, etc. those are far more common than HG's.
it's only the later Phase II (99 or 00+) EJ25's that leak externally and create the smell. the earlier EJ25's...and your EJ22 are unlikely to fail in that way. no need to borrow grief from another motor and experience - if you suspect a leak, verify it first, then find it. as for the additive, i doubt you'll need it or that it'll work on this motor. but if you did have the bizarre case of an external leaking gasket then try it if you're not willing to replace the gasket.
if it ends up being a headgasket, that's not too surprising on a 10+ year old car with that many miles. if all the miles weren't all under your belt then the car was probably overheated at some point in it's life as EJ22 headgaskets don't fail without provocation.
so yes - headgaskets fail in EJ22's, they are *caused*, not random occurrences like the EJ25.