Question about Cars & Trucks
Why did you replace the coolant or radiator fan?
Was it tested & failed a test?
Why is the coolant fill cap off?
Is the new fan turning in the correct direction?
Is the water pump working?
Is there any other electric coolant pump
down around the front of motor or coolant
hoses or auxillary coolant valve/solenoid assy?
Did the old fan motor come on? If you test it first,
& it was good. Then you need wiring diagrams to see
what controls the fans
Did you put battery voltage to the new fan before
you installed it?
Posted on Jul 19, 2013
It sounds like you have a blown head gasket or a crack in the head, these are the main reason pressure builds up in the radiator. Also check your Thermastat it could be jammed shut
Posted on Jul 19, 2013
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Posted on Jan 02, 2017
it is the head gasket blown from the cyl to the water jacket ,a radiator specialist can test for combustion gases in the water to confirm this ,but that is what it is . "youdoit"
Posted on Oct 25, 2009
Testimonial: "compression test ok still looking"
SOURCE: 1991 camaro overheating
There are two freeze out plugs at the rear of the block (V8) and many v6 engines. If coolant is coming from where you say, likely they have failed. Unfortunately, the only way to reach them is to remove engine or transmission, It's rare that they fail because they are "protected " by the bellhousing, but can still rot from the inside out. There is no sealer known to man that will fix this. It's a shame that you need to do all that work for a pair of $2.00 plugs, but that's what needs to happen.
Posted on May 23, 2009
SOURCE: Radiator blockage?
I believe you have a head gasket blown or a cracked head. When you start it up COLD with the cap off, it would push water out immediately. Fill it with plain water and try this. It might not be a bad idea to perform a pressure test too. Also check for antifreeze in the oil. It will get milky looking and might even be over full. If this happens after warm-up, you may just have a plugged radiator. Have it professionally cleaned. The water pump vanes could also possibly be corroded off and it's not effectively displacing coolant. Hope this helps.
Posted on Aug 16, 2009
Do the radiator fans come on? Turn on the A/C which should start the fans automatically. Does that stop the overheating? Replace the temperature sensor if engine heat doesn't turn on the fans (A/C off). The water pump can be checked by removing the thermostat and lowering the water level in the radiator until the tubes are exposed at the top. With the engine cold, start it and watch for water being pumped into the radiator (it should be a fair quantity), which points to an effective water pump. Shut off the engine, replace the thermostat, and refill with coolant.
Posted on Sep 26, 2009
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