[s-cars] Coolant in the oil sump ????

[Bill Mahoney]

Yes it is the head gasket.  

Look at the underside of the oil filler cap.  The coolant makes the oil
turn into brownish glop.

Maybe a good time for a timing belt, h2o pump etc. whilst you're at it.

IIRC I supplied all parts to my mechanic and the whole head gasket /
timing belt job cost I think $700.  Since I figure it had to take more
him more than a day and I didn't have to get dirty, this was a bargain.
He broke his breaker bar on the crank bolt too.

And since a head gasket replacement (be sure to get a steel one) is
trouble enough, no need to remove the transmission.

HTH

Bill m