Quote:
Originally Posted by barry12345
I wonder if someone previous to you put a head sealer or crack sealer in. Either it did not set up properly or was not the common one under many names. .
I suspect some abrasive component of it might be taking out the water pump seals. The usual product is waterglass based. If so and set it should have been visable in the passages when you had the head off.
Normally would not be abrasive in nature either.. lt a glass like coating when set in my experience. Not blackish either. At the same time it is silica based I believe.
Maybe if it was me I would try some detergent based flushes. Basically use water and detergent. Drive a day and do it again. This process for several days.
At first I though a internally deteriorating radiator or heater hose. This would not destroy the water pump seal though. Nor would it have the consistancy of clay.
What is on my mind is what would prevent water glass from fusing? Unfused is what you may be describing. Or some crazy additive with it making it high tech and problematic. Just a wild guess by the way. I am sure of nothing.
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good points.
I did clean every bit and corner of the cooling galleries in the block with long brushes and citric acid and cleaned out with water. flushed the radiator with a garden hose too (I think the radiator has that material trapped)
The old coolant that I removed was a gold/yellow colour (universal type I think) and the one I put in is the zerex pink for asian cars. I dont know if it has some extra ordinary cleaning properties.
another note I forgot is that both times the pump failed - there was a squeak from the belt when the engine was cold started. The pump leaked 3 or 4 days later.