I moved this one over from the "Vans" page for better visibility by more people
because it is an insidious little problem with our, and possibly other Chevy vans.
I noticed I was using a little more coolant than normal over the past month or
so, and also noted a small stain on the driveway last week after a local road trip.
Took it in to local GM dealer today, and they say it's the intake manifold gasket.
The repair estimate is around $1000. Includes a new serpentine belt (woohoo!!!!
Of course I asked about the relationship between Dexcool and these problems.
Apparently there hasn't been a proven correlation between Dexcool and the intake
gasket deterioration, according to the shop guy. He also said that if you flush your
system at least every 3-4 years, you shouldn't have any problems. I see where
using the green coolant instead, and not flushing it every few years, is just as bad
for your gaskets, etc.. Maybe it's not just Dexcool?
My van has 180,000 kms on it. The coolant was flushed in Fall 2009 by me.
It might have been the only flush since new, as I'm the 3rd owner.
Comments? Am I correct in assuming this is more widespread than just my vehicle?
Is there any point in switching to the general purpose "green stuff" I see mentioned
on various blogs and websites regarding this issue? Getting away from DexCool?
I just called the dealer ship back and asked them to flush me, and replace the Dexcool
with the "green stuff". They said "no problem", almost as if they were relieved that
I called back with my request. Peculiar?