- Joined
- Oct 4, 2014
- Messages
- 962
- Reaction score
- 101
- Location
- Minnesota, USA
- My Car
- 1972 H code fastback Boss 351 clone
Hey guys, a little insight needed. I was checking coolant last night and found an oily sludge in my radiator, it was building up on my radiator cap seal, and I can see it building up on the ends of the radiator cross passages. How can I tell if this is engine oil or a leaking internal trans cooler? Its just a brownish/black sludge. A couple notes: I did not re-torque head gaskets, Fel-Pro told me not to with their Perma-seal head gaskets, and also I have a stock brass/copper radiator, not sure of its age but it does not leak externally and it keeps the engine cool. I'm leaning toward a leaking head gasket as I feel I should have re-torqued gaskets.