Question About Havoline Dexcool

[skyway]

I have been running this in the bike for a while now. Dealer showed me the internals of the water pump which have a layer of about 1/16 of white residue built up on all walls. I have never seen this before on the internals of my bikes. Is it a result of the the stock yammi coolant or the dexcool?

What is this, corrosion? Should I be concerned? Could it be removed with a cooling flushing product?

 

[twowheelnut]

Are you mixing with water? If so, is it distilled or rotten Cali hard water? If you're using tap water, that'll do it.

 

[skyway]

Are you mixing with water?

Yes with the same stuff as directed by WC's fjrtech article. It sure does look like a mineral deposit though.

 

[Windjammer]

I've heard some unhappy things about Dexcool, specifically that it can be corrosive to some of the components it contacts in the cooling system. Meself, I see no major advantage in switching to Dexcool from the Green stuff the bike came with. Besides, the green stuff tastes better. :haha:

 

[radman]

Dexcool has had some strange issues. If any air is in the system whatsoever, it seems to have a problem with electrolysis, which leads to corrosion in the system. The white residue is what corroded aluminum looks like. Not good. Now WC has run Dexcool, and has not written of any issues with it. I, on the other hand, have seen many problems in cooling systems and it's associated parts on the job, with several hundred GM vehicles, ranging from deposit build up at the cap and radiator core, to corroded components due to electrolysis. All had developed leaks, and when the reservoir had emptied, had drawn air into the system. The others had used up the additive package, many well before the advertised life of the so called extended-life coolant, at about the 3 year mark. Some have gone 5 years or more, but none of these had leaks, or had air introduced into the system. Another no-no is tap water, use only distilled water. If tap water is added to the system, drain and refill at the first opportunity with a correct mix of antifreeze and distilled water. I personally am using Zecol-05, a low silicate conventional anti-freeze, and distilled water, at a 60-40 mix, along with water wetter.

 

[XJRGUY]

I've been running Prestone Extended life in the engine of my supercharged Jaguar.

It's an all aluminum I-6 that puts out 322HP and 378 ft/lbs of torque. The engine is made of aluminum, and so are the heads.

I have never had a problem running this orange coolant in my car.

Can't speak for the bike, but I am assuming Prestone is ok.

I am going to convert the bike over to the Prestone stuff too when I get time.

 

[yamaholic]

Rad-

I agree with you, Sir. Wife's POS oldsmobile has dexcool. After 50K miles, radiator and overflow are CRUSTY!!! Probably need to flush the system and probably get a new radiator next year. I've never seen such crustiness in a cooling system after only 50K miles. Looks like it has 300K on the coolant (dark brown, crusty, white specks). And yes...a little air in the system causes her car to overheat slightly. It leaks a little bit, so I have to keep an eye on it.

I advise everyone to use ProHonda coolant, Toyota extended life coolant, or Engne Ice. Prestone=silicates=clogged radiator. Never use that crap.

 

[yamaholic]

Could it be removed with a cooling flushing product?

Probably. Check out Xerex heavy duty flush. It won't unclog a radiator, but it should cleanup the pump, passages and hoses. Follow the directions to a T.