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Mod | | | Forums66 Topics128,030 Posts1,055,430 Members48,422 | | 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!
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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: Jan 2007 Posts: 161 Shop Shark | | Shop Shark Joined: Jan 2007 Posts: 161 | I'm finally going to fix my heater. And I think I know the answer already, but:
My radiator cap opens at 7 pounds of pressure. That means that my complete cooling system, and therefore also my heater, will be under a maximum of 7 pounds per square inch, right? I want to pressure test the heater core, and I figure that if it's 7 pounds/square inch I can test it by just putting the garden hose on one side and keeping my finger on the other side. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
How many PSI do you think that will produce? If it is too high, you might cause damage (there have been recent posts about this).
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