Quote:
Originally Posted by sgnimj96
I'm going to flush my system with the prestone stuff and then change it out several times after that on short intervals.
There is some orange film left from dexcool a long time ago but I changed to G05. The engine cools well so I don't want to do a CitricAcid flush.
At 2 bucks a gallon.... better than just water, but not a permanent thing. I normally run the zerex and distilled.
I do have another problem. Slow coolant loss. Haven't been able to figure it out. I just add a little water every few weeks to top off the reservoir. Not much, but I eventually dillute my antifreeze with more distilled water than it should be. Is the block drain bolt ever the culprit of a slow leak?
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Slow coolant loss could be a pinhole leak anywhere in the coolant system.
Typically loose hose clamps, old or damaged hoses, corrosion and pitting of hose nipples, water pump going out, cracks in coolant recovery tank, bad pressure cap on coolant recovery tank,
and even a head gasket breach that allows a connection between a coolant passages and a combustion chamber.
Closely inspect all of your hoses for damage and clamps for tightness.
Look for any coolant drips under the car, or signs of dried coolant on or around the radiator and coolant recovery tank.
Check that the rubber seal on the coolant recovery cap is still pliable enought to make a good seal.
Pressure test your coolant recovery cap.
Check for any coolant smell coming out of the tailpipe or in the cabin when you run the heater.
If you still can't find the leak(s), maybe invest in a UV detection like this one from Home Depot.
Powerbuilt Flourescent Leak Detection Flashlight Kit-648416 - The Home Depot