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Click on image for the lowdown. 
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| | | Forums66 Topics128,043 Posts1,055,609 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Aug 2000 Posts: 587 Shop Shark | | Shop Shark Joined: Aug 2000 Posts: 587 | You probably blew a hole in the radiator in the heater or one of the connections. Are you running a pressure radiator cap? These old heaters were designed to run with a zero pressure radiator cap. | | |
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