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#70392 12/21/2006 3:48 PM | Joined: Mar 2000 Posts: 73 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2000 Posts: 73 | I have recently upgraded my radiator to one with a 16lb cap. I'm now wondering if the heater core will hold up under the higher pressure. So far it's been fine. Any comments?
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Rick
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#70393 12/21/2006 4:30 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Rick Rickard,
I don't have any clue on the heater core, but am wondering why the 16lb cap. Wouldn't the pressure rating of the cap be determined by operating temperature characteristics of the engine. You might have a nice new radiator with a nice new cap, but unless something happened to the engine to make it run a whole lot warmer, the original rated cap would be the ticket.
Stuart | | |
#70394 12/21/2006 4:48 PM | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | ditto what he said - if yer still runnin the 235, they used a 3-7# cap originally, no need for more than that, regardless of the rad
Bill | | |
#70395 12/21/2006 4:50 PM | Joined: Mar 2000 Posts: 73 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2000 Posts: 73 | I should have been more clear. I upgraded to a 283 and auto trans. I was using the stock radiator with mixed results. The new one is a crossflow turned vertical from an 86 corvette.
Rick | | |
#70396 12/21/2006 5:00 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Rick Rickard, Sneaky....is it too late to backtrack and say 'the heater core will be fine'.  The only reason I say this is that I have never seen this concern addressed before and I know lots of folks have done this swap....as a matter of fact, I did this swap. No problems with the core! Stuart | | |
#70397 12/21/2006 5:07 PM | Joined: Mar 2000 Posts: 73 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2000 Posts: 73 | Thanks for the input. I have not seen concern for this either but the other day I was on a rather long ride, no radio on just listening to the truck and I started thinking about the Old core vs the new radiator. It would be ugly for the passenger if it failed suddenly. I feel a little better now. Thanks again, Rick  | | |
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