Yep!
I had a clogged radiator two years maybe three now ago. I found out later the previous owner had tried [dramatic music, dun, dun, dun] some stop leak product!
I drove about two miles and I was pegging red two times on successive days. I figured then that everything would be okay. But then I noticed I was pushing coolant past the cap on the overflow tank. I took it to Rover Cannibal and they put a testor of some type on that detects hydrocarbons and sure enough I had some in my coolant.
I have been pushing coolant for 2 years but not a lot. In the summer it is more than in winter. Actually I haven't had to add coolant for nearly two months now. But as the air temps of springtime in Oklahoma get up in the 80s(F) the coolant will be blowing out again.
The easiest fix and the most obvious is the head gasket. I have since fanagled another 4.2 motor and will be swapping it this summer I hope. I am going to tear it down, and do a complete top end on it before putting it in. We are then going to take my 4.2 and top end it and drop it in place of my buddies 3.9.
So the cylinder heads slipping...is there a physical test you can do to see if this is the case after the heads are off?
Dan sorry to be the bearer of bad news yesterday, I was sensing you stressing after I typed it. Flush that crap out of the system before it clogs the heater core and you have that fun job to do.
OR as you said yesterday....buy another Rover and start over!!!!!!!
Weeeeeeeeeeeeeee