Northstar Engines and System Technical Discussion Discussion, 2002 Eldorado coolant flush what kind? in Cadillac Engine Discussion; i just bougt a 2002 has 98 k on it it just had water pump replaced according to previous owner, ...
i just bougt a 2002 has 98 k on it it just had water pump replaced according to previous owner, two questions it has green coolant in it should i flush and go with dex cool and add gm supplement pellets(do i need to add pellets at all), second notice it has a regular silver radiator cap on the resovoiur tank thought they had a black plastic screw type cap for them ?
Everything's at your own risk - and it's all preference. One guy will tell you green, another will say Dex, the next guy will say no pellets, and another will counter saying with pellets. 'round and 'round we go.
I find the best recommendation is to use what you like. Coolant's primary purpose is merely to act as a medium to transfer heat energy away from the engine - no rocket science here. However, whatever you do, just be sure to follow the manufacturers maintenance schedule.
DEX-COOL is a recommended 5 year coolant designed to allow today's car driver, who probably does not even know where the oil dipstick is, to feel warm and fuzzy while waiting for some dashboard message like "Help, I'm dying" to pop up before taking it to an Oil Doodle for "service".
Good ol' "'green garbage" is an excellent coolant, now in low - or no-silicate formulas, that has a recommended change interval of 3 years or so - far too frequent for the above typical car owner.
Use either coolant, but perform regular fluid level checks, and change coolant - whatever type - every 3 years.
Hopefully you're not having any overheating symptoms? I'm a little concerned to hear that you have a replacement cap and water pump and are at 98K miles and a new owner - those are some of the items (along with the radiator) that people often replace before they discover or confirm that leaking head gaskets/pulled cylinder head bolts are the true cause of their overheating. I'm not trying to put the whammy on you - just hope someone didn't sell you a car with undisclosed HG issues (not that we've ever heard of anyone doing that!).
I've always liked the Dexcool, with a few pellets for good measure.