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gurgling in cooling system

 
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Old 25 Apr 2014, 12:14 pm
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Default gurgling in cooling system

Have 2002 cruiser. Had water pump replaced last Nov. Was fine all winter and now since it starter getting warmer temps, get a gurgling sound near reserve tank. Was getting hot and replaced thermostat. Now doesn't get hot and only hear gurgling when shut off engine. Losing fluid, but no apparant leaks. Any suggestions.
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Old 25 Apr 2014, 12:59 pm
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Default Re: gurgling in cooling system

there's a good chance you have air in the system. on mine the thermostat housing had a small crack that I couldn't see, had the same symptoms as yours. replaced it and bled the system and no problems since then.
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Old 25 Apr 2014, 01:44 pm
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Default Re: gurgling in cooling system

mispep, welcome to the forum.

No apparent leaks could mean one of two things. A cracked head gasket or the small leak into a hot area where it turns to steam and disappears. A small leak will cause air to take it's place in the cooling system and cause gurgling and overheating. Cheapest place to start is a pressure check on the cooling system to find the leak.
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Old 25 Apr 2014, 03:24 pm
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Default Re: gurgling in cooling system

I must have gotten at least a dozen pm's and 2 customers last year with this complaint. It was the radiator cap or the housing itself not sealing properly.

Like CREWZIN suggested a coolant pressure test followed up with a test for blown or cracked head. This is called a "block tester. Bo these test are very easy to do.
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Old 25 Apr 2014, 03:45 pm
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Default Re: gurgling in cooling system

is this a block tester?
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Old 03 Jul 2019, 01:46 am
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Default Re: gurgling in cooling system

Quote:
Originally Posted by mispep View Post
Have 2002 cruiser. Had water pump replaced last Nov. Was fine all winter and now since it starter getting warmer temps, get a gurgling sound near reserve tank. Was getting hot and replaced thermostat. Now doesn't get hot and only hear gurgling when shut off engine. Losing fluid, but no apparant leaks. Any suggestions.
Gurgling is a sure sign of an air pocket in the engine. On a COLD engine, loosen the block bleeder nozzle (3/8 socket) located on the thermostat housing under the filler neck. slip a 2 ft piece of clear plastic tubing onto the nozzle and feed it into a clear bottle so you can see the coolant as it runs into the bottle. pour fresh coolant into the radiator till no more air bubbles show in the tubing.
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Old 03 Jul 2019, 11:56 am
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Default Re: gurgling in cooling system

little late to the party, bob.

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