Thanks to all. To update the coolant problem with the 2001 Century
with 3.1L engine.with 86000miles. Oil,ATF and antifreeze changed at
5000 50000 and 75000 miles.
I took it to the local Buick dealer (all GM except Chev)
and it was indeed the intake manifold as most here expected.
The Dealer's shop replaced all the gaskets and seals from intake
up. changed the oil, changed the antifreeze for a total cost of $677. I
that is pretty reasonable. I also talked to the shop manager about
on going gasket problem. He said they get 3 or 4 Centuries in every
for this problem, but that is about the only thing that goes wrong (
brakes of course). He believes this new gasket is good for well over a
I had thought about doing this job myself, but Hey, its Christmas:-)
Thanks to all for their help and interest.