BUBBLES IN COOLING SYSTEM 1994 CHEVY 350 PICKUP

1994 CHEVROLET TRUCK
180,000 MILES • V8 • 2WD • MANUAL
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JYO007J
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having problems with bubbles in my cooling system. will cause my cooling system to build up pressure and vapor lock. did compression test today and all cylenders were right aruond 150 psi. tried burping the system for about an hour and kept getting more and more bubbles. where are these bubbles coming from?????
1994 chevy pickup 2500. 350 motor.
Apr 11, 2010 at 7:27 PM
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HMAC300
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you have air getting in the system and usually that's an indication of a head gasket. Have it pressure checked to see if you are losing pressure someplace.
Apr 13, 2010 at 3:18 PM