Question about 2003 Chevrolet TrailBlazer

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What test to run to check if the block is cracked

It overheats all the time

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Radiator pressure tester... pressurize system and look for leaks. of course it could be a bad thermostat or plugged radiator or heater core

Posted on Apr 13, 2014

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Posted on Jan 02, 2017

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1 Answer

What makes the car to overheat


fan not running
blocked radiator cores
missing radiator fins
thermostat faulty
lack of coolant
faulty radiator cap
running too lean
incorrect ignition timing
blown head gasket
cracked head or block
driving too fast in a wrong gear --overdrive not working
overloaded
no antifreeze-antiboil
coolant leak

Jan 23, 2017 | Cars & Trucks

2 Answers

How can you tell if you cracked your engine block when it overheatedwhen you crack an engine when you overheat it


most of the time it will not start, if cracked..... but if it starts, and runs roughly..... have a mechanic look at it.... most of the time when an engine overheats, If you let it cool down by itself.... you are probably OK... NEVER PHYSICALLY POUR COLD WATER ON AN OVER HEATED ENGINE.!!!!!

Sep 22, 2014 | Cars & Trucks

1 Answer

Northstar engine over heating; replaced thermostat, flushed radiator, still overheats


have a compression test done to check head gasket and cracked head/s. Flushing a radiator is a waste of time as blocked cores will not clear so have a flow test done on the radiator to gauge the number of blocked cores. Check the fins condition on the cores . If you have a viscous fan hub on the fan then replace it ( indications are that it overheats at lights ,when going slow or high rpms going slow but cools down when moving at speed). Check timing and air/fuel ratio as lean fuel mixture will cause overheating Check that the bottom radiator hose is not collapsing under high rpm blocking off the water flow.

Jul 16, 2014 | Cadillac DeVille Cars & Trucks

2 Answers

My 2005 jeep liberty over heats, any solutions


check to see if you have a viscous fan hub and if so then replace it . Check when the overheating occurs If it is at stop lights but cools down when travelling. It is the hub. If it overheats when going slow and under load it will be the hub. If it overheats when travelling fast then check the radiator for core blockage and have a compression test done to check for head gasket / cracks Run fault codes and check for blocked exhaust system --cat converter)

Jul 02, 2014 | 2005 Jeep Liberty

2 Answers

Chevy lumina overheat


engines overheat with no thermostats. Very simply put the water circulation is too fast for the heat to transfer to the air. Water pumps fail from bad bearings and pump seal but for no other reason. So back to basics Refit with a new thermostat put in properly. Have a flow test done on the radiator for blocked cores. have a coolant system pressure test done for leaks and cap failure.. have a compression test done to check for head gasket or cracks.. Check for correct ignition timing and air/ fuel ratio mixture. Run fault codes . when refilling with coolant ensure that all air locks are removed

Dec 29, 2013 | Cars & Trucks

3 Answers

How do u kno if your head gasket are cracked


If you have a blown head gasket the best way to tell is check the oil and see if it has water in it. It will e milky or gray. Also, check the radiator and see if there is oil in it. This isnt a problem to ignore, you wil want to address it immediately.

Nov 18, 2009 | 1999 Kia Sportage

2 Answers

1998 ford expedition 4.6 engine without tow package...overheating


If you're running it without a thermostat it's clear there isn't enough/any coolant circulating through the block. When the motor is running are the hoses off the radiator soft and flexible or stiff. If they're soft there's no coolant flowing through them. Chances are the radiator core is bad or there is a crack in it somewhere. Have it removed and tested.

Sep 15, 2009 | 1998 Ford Expedition

2 Answers

Possible cracked block or head


A cracked block often results in oil in the antifreeze. A cracked head or blown gasket is often heard while accelerating plus it my chug or miss. Take it to another garage and get the system pressure tested. I am not sure if thats what you meant by "a carbonation test". Check for milky looking oil on the dipstick first. If its normal then have the garage inspect the head for leaks using an ultraviolet light around the heads. It may a clogged rad or a faulty water pump too, even a faulty rad cap. Let me know any more info when this is checked. I hate to see someone ripped off.

May 24, 2008 | 1997 Ford Explorer AWD

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