#Dexcool coolant brown manual#
Its cheaper than removing the head and finding out you're wrong.And here's a kicker if oil is found in the cooling system, the service manual says to replace the t-stat. If you are concerned about a possible blown head gasket then use a compression gauge to determine whether a head gasket is blown or not. Once all this is worked out, drain and refill with the 50/50 mix. Instead of using more Dexcool, just use plain water for flushing and running until you're assured the heater and cooing system is working and no engine oil is contaminating the cooling system. Spending the time now instead of complaining later about a lack of heat this winter will give you the heat you'll need this winter. Heater cores have coolant circulating all the time with the temperature blend door in the HVAC box closing off air flow into the heater core so heated air doesn't come into the interior. If the cooling system was never flushed right and the heater checked for functionality (whether its hot out or not), how do you know the heater core or one of the heater hoses is blocked? Why not remove the top layer of coolant with a turkey baster or better yet go back and attempt to figure out if the heater is still blocked or not. Finding chocolate milkshake fluid floating scum on top of coolant may be just the blockage suddenly being freed up and purged out of the heater coil. If you never fixed the lack of heat problem then its possible for blockage to leave air in the system. Is there anything else this I should check before I tear the head off this sucker?. Dip stick oil appears normal have not drained oil from crankcase yet to inspect. Refilled with Dexcool, drove for 10 minutes, took reservoir cap off to find chocolate milk looking scum floating on top of coolant. Last week coolant level dash light went on. Suspected clogged heater core but not checked (summer came). Heat intermittently came back but was not reliable. Thermostat and Dexcool changed 6 months ago to fix no heat availability in winter. Intake manifold gasket changed 2 years ago to stop high idle, check engine light on and codes being thrown.
#Dexcool coolant brown free#
In other words, you should be maintaining your maintenance free cooling system. Will last 5 years and 150,000 miles, and that the problem is lack of maintenance. Moreĭiscussion on coolant, inhibitors, and silicatesĭex-cool manufactures continue to insist that Dex-cool These are called hybrid inhibitorĬoolants because they contain both silicates, and OAT formulations. Have used OAT formulated coolant with an addition of some low level silicates to Have slightly different formulations for different markets. Vehicle manufactures increasingly are moving to OAT coolant, and may Depending on the brand of coolant, these ingredients may That constitute the OAT, including carboxyl, benzoate, borate, triazole, andĢ-ethylhexanoic acid. Slowly to situation changes as opposed to the faster acting silicates (works "background" or reserve protection (works like a vitamin), and as such, tend to react more Silicates are discussed more here.Īcid Technology refers to the type of corrosion and rust inhibitors used in Manufactures have moved away from silicate enhanced coolant, to OAT enhancedĬoolant. Years this protection came from silicates, but more recently coolant The differences between coolant brandsĬomes from the additives that enhance the corrosion protection properties. Manufactured using ethylene glycol and mixed with 50% water when installed in aĬar or truck. I believe it is this response that has spawned the current class actionĪbout 72 brands of coolant on the market today. Period, the solution is simple: replace the radiator, hoses, intake manifold gaskets and maybe the water Yet once the vehicle has gone past the warranty While the vehicle is still in warranty - turnĪ blind eye. Is the GM dealer response to the problem. (overflow) container would suffer the same problem. If air were the culprit, all Dex-cool systems in every vehicle with a recovery Neither of these theoriesĬompletely explain the whole picture, and these are not a universally shared Resulting in aluminum oxide formation and deposits. Head design traps air in pockets, allows condensation and ultimately dilution, They say that with a faultyĬooling systems allow evaporation, allowing the Dex-cool to destabilize, weaken,Īlready marginal protection, and then turn muddy. Industry (including GM) that claim that exposure to "air" causes the Dex-cool to come apart,Īnd that faulty radiator cap design is the culprit.
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