I have an 07 wrx with 98k miles, mods:
sti inter cooler
300 fuel pump
and an sti trans
i think that is all.
I noticed my coolant is chocolate brown. Before I diagnose it as my worst nightmare, a blown head gasket, what else could cause this to happen?
I only ask because there is no coolant in my oil, both oil and coolant levels remain constant, the motor does not overheat and no smoke. The only symptoms are the brown coolant and my turbo for some reason sounds a lot louder, like the wooshing and whistling comes about at way lower RPMS than the usual.