2002 Monte Carlo LS 3400 engine Dexcool 44,000 miles. Out of warranty
I'm nearing the 5 year anniversary of Dexcool and the dealer recommends
doing a Flush and Fill. I've noticed a little sludge buildup (more like a
silicone sludge) in the radiator neck where the coolent doesn't reach... there
not been any coolent leaks or loss of coolent in the car.
Several options here ....
The dealer will flush and fill the system for $ 225.00 He wants to continue
Another shop will completely flush and refill the system with the green
glycol. Cost will be about $200.00
Looking on the web, I found propylene glycol, which is biodegradeable. I'm
about draining and flushing the system myself and using this
Particularly noteable is the part where if a intake or head gasket leaks,
the engine might not be immediate.....and because the 3400 engine is prone to
manifold leaks..... would this is an advantage ?? (not that I would run the
water in the oil, but this is a known problem area.).
I like the fact that propylene glycol is much more environmentally friendly than
Dexcool or Ethylene Glycol.
Any good advice here ???