Mechanics

OVERHEATING

2006 Nissan Altima • 200,000 miles

MY CAR ABOUT A MONTH AGO STARTED TO OVERHEAT. FUNNY PART IS THE TEMP GOES UP AND COMES BACK DOWN. WE HAVE REPLACED BOTH THERMOSTART, WATER PUMP, AND MY STARTER.

THE CAR OVER HEATS WHEN IT WANTS TO AT ANY PARTICULAR TIME. WE HAVE DONE FLUSHES, OIL CHANGE, PRESSURE TEST AND ALL AND STILL THE SAME THING. THE SERVIE ENGINE SHOWS ME THE OH2. THERE IS NO LEAKS AT THE BOTTOM OF MY CAR, THE RADIATOR SEEMS TO HAVE COOLANT. THE ODD THING IS THAT I DID HAVE TO ADD ANTIFREEZE TO IT SINCE IT WOULD RUN LOW EVERY 3 TO 4 DAYS.

IS THE HEAD GASKET THE NEXT STEP?
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SOLEP
July 2, 2013.



The temp gauge is probably bouncing around because the cooling system is full of air pockets. Your first step is to fill and pressure test the cooling system to see if it holds pressure.

Wrenchtech
Jul 2, 2013.