| Re: [GMCnet] Filling Cooling System [message #324455 is a reply to message #324440] |
Fri, 29 September 2017 17:42   |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
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Be sure there are zero micro cracks in the overflow return hose. If it can suck any air it will not refill rafiator. Also inspect radiator cap well. If outer seal is worn or shifted and mushed, it may not pull coollant back in. Also check the spring and action on the center poppet valve. I recently had a poppet valve spring valve spring fail so cap would build zero pressure, even though pressure seal and spring were fine.
John Lebetski
Woodstock, IL
77 Eleganza II
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