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I have a 2000 chevy venture with a blown head gasket, (water is leaking under block, oil is milky, water reservoir makes boiling sounds). Should I try that thermagasket? other than changing the head gaskets ?
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If it has oil in the coolant resivoir bottle it has most likely got a blown head gasket or a cracked head/block. It will require diagnosing and repair which will be expensive. I hope you got it cheap. Fitting a second hand engine may be a good option as you dont know how hot this one may have gotten.
Well, the good news is this could be something as simple as a blown head gasket. The bad news is most likely that is not the case. You have either cracked your block, cracked the head, worn a hole in your timing chain cover that is allowing the water and oil to mix or blown your head gasket or a combination of these problems. Your choices are to pull everything apart and magna Flux the Engine block and heads or replace the motor, assuming the issue isn't a hole worn in the timing chain cover, or replacing the motor, the easiest of the solutions although not the cheapest. A decent short block should run around $600 to $1000 with shipping. It's used but has been checked and should serve you for a while. The other option is rebuilding the motor. Should you choose to rebuild the motor I recommend you get the Haynes or Chilton's repair manual on your vehicle for doing the job.
this sounds like a blown head gasket its poped across the oil way thats why water is in the oil best get it fixed fast as the water in the oil will wreck the engines bearings very fast,,,
The milky white substance is water mixing with oil. Oil normally mixes with water in your engine from a blown head gasket, but if your not having any problems with your car I have seen where a little water gets under the oil cap from washing the engine down. Hope this helps.
Known issues or not,It sounds like the head gasket is blown,or it has a cracked head.If it was water it would be thick and light grey in color on the dip stick,But yellow indicates antifreeze leak that has not had time to mix with the oil.
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