Question about 2002 Nissan Sentra

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Nissan Sentra 2002

I was told that my Nissan has a coolant leak. The External Head Gasket has green coolant around it. I am a older women who knows nothing about cars so please help.
My car only has 24,000 miles on it.
I need to know if it should be repaired and where as I live in Portland, Oregon.
Also took this car into Nisson Dealership for inspection 2 months ago and they (to make this short) did not find this problem.
A Mac's Cooling shop found this problem as I also needed a new Radiator etc. as it was also leaking coolent.
Hope this makes sence as I am in hurry.
Thank you,
Sheila Smith

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Take it to your auto parts store in town (call around to find one that can before you leave your driveway) and have them do a radiator preesure test. Won't cost a dime. If it pressure to 30 p.s.i. and holds, you more than likely don't have a problem and the techs were pointing out a previous problem and didn't know it had been repired.

Posted on Jan 10, 2009

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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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