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Symtom of cracked head

Running hot..changed thermastat...

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Yes that could be a symptom of a cracked head or blown head gasket.

Posted on Feb 09, 2014


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Posted on Jan 02, 2017

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SOURCE: gets hot,head gaskets were changed and head was

could be a plugged radiator,have a shop put a flow tester in line and see if its flowing at capacity,hope this helps

Posted on Oct 03, 2009

  • 192 Answers

SOURCE: i have 1998 cadillac seville w/northstar motor

The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

Posted on Feb 25, 2010

  • 2100 Answers

SOURCE: run s hot.changed thermastat.still runs hot no

No water in the oil? How about oil in the water? When you fill up the radiator, is there a scum floating on the top? Look for steam coming out the exhaust when the engine is warm. A radiator shop can do a comp check and tell you real fast what is wrong. It sounds like a head gasket, Keep an eye on the temp gauge. One more thing is the engine could have air trapped in there, and it needs to be vented out, all cars are different, some have vents, some don't, some don't do it. Some need to be elevated to be filled, etc, check it out. Hope this helps.

Posted on May 14, 2010

  • 369 Answers

SOURCE: my 98 chevy malibu is

If your engine is running fine with no miss in it possibilities could be radiator fan or water pump if the radiator fan is working fine it could be the water pump. I have seen a water pump after removing it where the fins on the pump were completely worn out causing the overheating.Let me know how this turns out for you thanks.

Posted on Jul 27, 2011

  • 10 Answers

SOURCE: cracked head

Believe me, if you have a cracked head you don't want to know about it. The problem is most probably with the cooling system (e.g. a clogged radiator). That's the best I can do with the insufficient information you've furnished.

Posted on Jan 07, 2012

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Hello again
The problem here based on what you have told me is that you have a cylinder head gasket leaking combustion gas into the cooling system, this creates gas pockets around the thermostat and delays it opening. You can try adding one of the many head gasket sealers available in auto parts stores. I suggest you contact a local NAPA or Carquest auto parts store and ask what they think really works, I' heard that many do work but have no 1st hand knowledge. To make sure air is not in the cooling system do the following, you will need a floor jack. If the problem persists you will need the head gasket replaced and the cylinder head checked for cracks and if it checks ok then machined flat again.

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