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Posted on Jan 02, 2017
Check your oil and see if it looks like chocolate milk. If the engine is completely cool (like it's been sitting overnight), unthread your oil drainplug a little until fluid starts to come out. You might have coolant in it. If you don't have coolant in your oil, and are still having the problem, have your block tested. It's really easy to do yourself and you can rent the block tester at Autozone for $25.00 (you get it back once you return it) and the block test fluid for $8.99. Follow the directions. If the test fluid turns green or yellow you have combustion/emission gases in your coolant. If this is so, you can undo the spark plug wires on first one head then the other, this will tell you which cylinder is leaking. If you don't want to do this, take out each spark plug and look for coolant on the threads or white corrosion. This is all leading toward a blown head gasket.
Another problem with this car comes up in the cooling system. If you're still using the red coolant, this is really acidic for your cooling system and has been known to eat away the impeller blades of your water pump. You can check the seals by seeing if you have water coming out of your weep hole. If so, replace the water pump. You can also get your cooling system pressure flushed at a shop where they do a reverse flush and chemical flush. After this, switch to the green coolant which doesn't have the acidity of the red stuff.
Finally, there are also problems with electric scale in the heater core. You can put a wire that is grounded to the frame against your heater core (secure it with a hose clamp to the heater core), this will draw away the electro-magnetic field that leads to the break-down of your coolant. Let me know how things go.
Posted on Jun 28, 2009
I've got an old Buick Park Avenue with 200,000 miles on it that doe the exact same thing. It is caused by fuel leaking past the injectors while the vehicle sits overnight. Your problem may be something else. Have the computer scanned for codes. That's usually the best place to start looking.
Posted on Dec 21, 2010
SOURCE: I have 85 toyota have changed water pump reader cap thermostat and still gets hot boils out water but when you put cold water it's ok for the rest of day sets over night start next day gets hot ag
did you let excess air out of radiator? after filling let it run for a few minutes with out radiator cap and make sure the water does not go down and serculates after thermostat opens, refill if needed
do you notice moister under vehicle in the morning ? possibly a gasket could be leaking.
Posted on Mar 30, 2012
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