Reply to "Heater core issue...or is it working fine?"

bosswrenchMember

Sometimes, if the manual valves are left closed too long, or maybe if only one valve is used, trapped water, silt & antifreeze in the heater core seems to form a type of green jelly that blocks things up. It's a good idea to purge the cores by opening the valve(s) every year or so..... and I'm as bad as everyone. My 2 valves have been closed for 10 yrs- I should take my advice!

As far as using air pressure, remember the cores were kind of thin & fragile in 1971, they are now 43 years old and are completely unrepairable if they perforate. Ideal would be a good soak in a big pan of hot water but pulling the dash is a chore. Eaaassy does it!

12/8/141:45 PM

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