On Alfa number 15
AO Platinum Member
Join Date: Dec 2005
Location: United Kingdom
Re: Viewed a 156 - HGF?
Quite a few Ts engined cars I have seen have the gunk inside the expansion tank, mine included. I wouldn't say its too much of a problem unless you can actually see oil foating on the coolant, or if it is very severe.
The expansion tank is easy to clean, there is a guide on alfa156.net
Head gasket failures are quite rare on TS engined cars, unless there has been another fault that has caused it such as failed cooling fan, water pump, blocked Rad etc..