Cooling sys. over heating

Asked by GuruVSBPV Aug 23, 2018 at 01:51 PM about the 1994 Chevrolet S-10 4WD

Question type: Maintenance & Repair

I have a 94 s10 blazer 4.3 liter NO AIR. I have
replaced  everything still over heating. I have notice
that if I don't put the rad. cap on half way it builds a
lot of pressure and over flows the over flow bottle
I'm at a loss can you help????

1 Answer
65,450

firebird338 answered 6 years ago

Try bleeding air from system like this. Remove cap from overflow tank fill with antifreeze to full mark leave cap off and start vehicle and let idle you will notice level in tank start to rise this is normal once thermostat starts to open level in tank will drop add more antifreeze to full mark then put cap back on.

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