Question about 1999 Chevrolet Silverado 1500
No blockage found. Someone says there is a switch but the hose goes straight to cor and back to engine. Door flaps work god. I Am lost now. Was a mechanic for 6 years this one has me buffalowed
When you put your hand on the inlet & outlet heater hoses are they both hot to the touch ? I mean 'ouch' hot, not just warm.
You might have an 'air lock' in the system if they are only warm, or temp feels quite different between them.
If possible, leave the return heater hose loose, start engine, let it warm up then bleed the system using return hose for a minute or so.
KEEP rad full while bleeding.
tighten hose, then watch the radiator fill hole for signs of air bubbles or frothing coming up thru antifreeze.
If either are present, you may have compression leak !
Another check for compression leak, is put rad cap on, drive around the block twice, let vehicle cool down then slowly remove rad cap & smell at filler hole as cap comes off.
compression leak will smell strong & burn eyes.. & we both know there is only one cure for that situation !!
Posted on Mar 02, 2009
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Posted on Jan 02, 2017
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