Head lifting? - sludge under radiator cap
What are some signs the heads are lifting?
Engine is running good at 14psi with gt40 irons, arp studs an 9333 gaskets. Not smoking or mixing coolant with the oil. Not running hot at all. However, I noticed some brown sludge gathering on the bottom of the radiator cap the last time I drove it. I checked with a block tested and fluid and it was inconclusive, no change in the fluid.
I'm used to blowing the head gasket with coolant everywhere. Not sure what to make of this.
1992 5.0 coupe - TTI single turbo
1986 Merkur XR4Ti - 2.3L turbo