Engine overheating

Thank you for your reply. No it's not leaking. I'll just have to start replacing items. At least I have a starting point.

Just replaced the rad cap and so far the boiling over problem has stopped.

Hope you can help with this issue, I recently had my Blazer in the shop for a failed distributor and rotor. ( Approx ) 1 month ago). Well, 3 days ago my temp guage shot straight to the top while coming home from work, then it dropped to zero, this occured several times as iI looked to pull over. I also ni=oticed my valves clattering just as pulled over and shut off the engine. No bursted hose just a bit of coolant were I stopped. Oil was maybe a quart low. I had it towed to my local dealership and after a day they called and told me I needed a new radiator, hoses, and I should also change the water pump and the lower intake gasket also needed to be replaced. Seems that the Dexcool inthe system had turned to gel inside and fouled up the system. Here is my real question, I was called back 2 days later and the shop told me that when they went to test the vehicle after the repair they noticed the the engine was missing, when they tested the engine they found a cylinder was miss firing anf then scoped the cylinder. They told me that there was a hole in the top of the piston and that the plug was also damaged. They said this was caused by the overheat, and that I now needed a new engine. The engine was perfect before this incident, I have never had any major maintenance, and the car was running maybe for a minute before I shut it down when the overheat occured. What may have caused the damage to the piston and was it caused by the overheat. My cocern is that they may have dropped something into the intake manifold when working on the lower seal for the intake manifold and possible fouled the piston when they started the engine back up after replacing the radiator, water pump and the lower seal. They quoted me about $4800 for a used engine replacment and approx. A grand more for a new engine. What do you think about the cause of the engine damage and the estimate for the repair, I am currently $1500 into the ar for the radiator, water pump, and seal work.

Thanks alot, this will be very helpfull in making a decision.

Fantastic response

My 02 Blazer has a heat issue. It over heated the other day. I checked to see if the thermostat was opening by removing the radiator cap. The fluid seemed to be flowing fine so I'm sure the thermostat and pump are fine. I then had the cooling system flushed and refilled with new fluid and had the cap replaced. It still overheated but not as quickly or as bad. My question now is should the clutch fan spin easily by hand and should the coolant have a burnt rubber smell? I suspect the clutch fan and the lower radiator hose needs to be replaced. If you can help me with this puzzle I would greatly appreciate it.

The air flow is fair but I am questioning the fan because when I spin it their doesn't seem to be enough resistance. I have replaced the thermostat and lower hose and this has helped quite a bit

My radiator had a sever leak. I ordered a new one with a new thermostat online and while waiting for it to come in was putting about a gallon n half or 2 gallons of antifreeze a day. The heater quit working while I was waiting for the new radiator to come in. I replaced the radiator and thermostat and drove it around 30 miles, it wasnt running as cool as normal but wasnt exactly overheating. After the 30 mile drive home antime I drove it it would overheat. I replaced the thermostat again, and let it run on a slope to make sure all air was out of the heater core. Now as it warms up heat comes from the vents but once I turn the heater on high after a minute or 2 the air goes cold again, the motor itself is still running hotter than normal but not overheating at this time. My thoughts are that if I backflush the heater core that seams to be clogged and try and to unclog it that my cooling system will return to normal and cool correctly.

There is radiator fluid leaking down the front of the oil pan so im going to assume head gasket. Time to send it to a shop. Thank you for your time.

What does it mean when the coolant in the coolant container is boiling? Boiling happened after the car was turned off, the a/c had been running prior. No boiling when car was turned off and the a/c had not been running.

Engine Cooling problem
2001 Chevy Blazer 6 cyl Four Wheel Drive Automatic

My car is overheating pretty bad. The heating doesnt wanna work at times but when it does the engine cools off. Today my car overheated and shut off and now its mis firing. Do I just need to change my thermostat.

Hi I have a 2001 chevy blazer that is overheating I tried replacing the thermostat but that didn't solve it. It gets to the check gauges light within about 3 to 5 minutes. Any ideas what could be causing it

I just bought this truck and it is overheating. I have changed the thermostat and got a powerflush and it still overheats when you are sitting in traffic with the a/c on. What can I do?