1999 Isuzu Trooper Radiator not taking coolant back from re

1999 ISUZU TROOPER
100,600 MILES • 6 CYL • 2WD • AUTOMATIC
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BRINBULL
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I had my radiator changed approx. 2 years ago. Since then the coolant will go into the reservoir and not return to the radiator. I have had it checked several times, had hoses replaced, pressure tested, etc. The only problem found are some pin holes in the top of the radiator. I have a vented cap now, so I can pull coolant out of the reservoir and put it back in the radiator. The coolant level in the radiator drops about 2 inches in a 100 miles. Any advice?
Feb 7, 2010 at 2:16 AM
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MHPAUTOS
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Hi there,

You must ensue that the cooling system is sound with NO leaks, and that the pressure cap holds pressure, and the vacuum valve is working, if in doubt get a new cap,

mark (mhpautos)
Feb 7, 2010 at 6:41 AM