Question about 2001 Mazda 626
Car overheated and now will not start mechanic says loss of compression. how do I or can I even fix this?
The most common cause is a blown head gasket and sometimes a warped head. Someone would need to remove the cylinder head and have it checked for damage, then replace the head gasket.
Posted on Jul 16, 2013
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Posted on Jan 02, 2017
SOURCE: Overheated, now won't start
I would pull the plugs and check them for the presence of water beads. Any time an engine overheats severely, there is a good chance of having a blown head gasket and if this happens, when cooling, coolant can be sucked past the breach into one or more cylinders.
Posted on Mar 22, 2009
Turn your engine on with the A/C on high. Watch your cooling fans mounted behind the radiator to make sure they are running. If they're not running, you have something wrong in the electrical side of the fan system. The cooling fans are essential for cooling as they pull air through the radiator when the vehicle is not moving fast enough to cool the coolant. The problem probably lies in a relay, so replace the high speed fan relay with one you know works but is not essential for moment (rear window defrost or something similar) and put that in the relay spot for the high speed fans. If the fans kick on now, you need to replace your relay and this will probably also fix your overheating.
Posted on Jul 12, 2009
The car overheated and something caused the overheating. Bad thermostat, low coolant level due to a leak or busted radiator hose, inoperative cooling fan, or a bad water pump. Lots of things can cause an overheating condition and I am not really sure that any blame can or should be assessed to anyone regarding what caused the overheating....something caused it and I would be hesitant to blame the driver. I doubt that the person did anything devious like drain the coolant out. However, poor judgement was used in continuing to drive the vehicle after it overheated. This can cause major problems like a blown head gasket or even a completely blown engine. Maybe the lady panicked or was unaware of the damage that it could cause to keep driving. I suspect that it wasn't something malicious (she probably feels bad enough, already), but just a simple error in judgement. I would probably give her the benefit of the doubt and explain (calmly), the mistake that she made and why it was a mistake. She didn't cause the original problem, she just handled it badly. I would check the condition of the vehicle out and go from there. What's done is done.
Start by trying to find out what caused the overheating and if it caused any permanent engine damage. Some of the things that I mentioned earlier would be a good start, or you could have a certified auto tech take a look at it. It was really nice of you to lend the use of your car to someone. I am really sorry for the trouble you are having and I hope this helped. Best wishes.
Posted on Sep 24, 2009
They could but the most likely culprit will be a bad head gasket and/or a warped head. Aluminum doesn't take extreme heat well. Hope this helps.
Posted on Aug 21, 2011
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