WON'T START, PRESSURE BUILT UP IN RADIATOR.......

1995 Oldsmobile Cutlass

Tiny

Peanuts54

September, 18, 2012 AT 3:28 PM

The car will run great for a month or two then will not start and it has built up pressure in the radiator. Let the car sit for a day or two after removing the radiator cap, yes after it has cooled off. Then the car will run great again for another month or so. What may be the cause of this?

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4 Answers

Tiny

KHLow2008

September, 18, 2012 AT 4:08 PM

Do you have coolant losses or overheating issues?
When pressure builds up, does the coolant level in radiator drop?
Have you checked for trouble codes?

Tiny

JDL

September, 18, 2012 AT 4:15 PM

If there was too much pressure in the radiator it would pop the cap and the reservoir would fill up. When the problem occurs, if it cranks good but won't start, have a helper crank it while you check for spark at the plugs. If spark everywhere, use a gage and check fuel pressure.

Tiny

JDL

September, 18, 2012 AT 4:17 PM

Hey khlow, no answer there when I started typing. Have a good day.

Tiny

KHLow2008

September, 18, 2012 AT 5:43 PM

No problem. The more the merrier, JDL.

Same to you.

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