Scnooby

... about half the cost (£1100 inc skimmed heads).

on the plus side it was a good chance to save a little on labour getting the clutch, timing belt, pulleys etc done.

Hi Lee,

I opened the coolant reservoir cap (from cold) above the turbo and watched the bubbles. then looked into the coolant expansion tank and found more bubbles.

Apparently this is the early warning signs, but it can take quite a while to actually go. At this point it still passed a sniff test.

I eventually took it to a dealer, then a specialist for testing. ...

hi scnooby,had a 1993 wrx import for a couple of weeks.when checking levels noticed same kind of gunge in coolant tube neck.not heard any bubbling,but header tank cap has been leaking. how did you eventually diagnose thanks lee.