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| | | | Joined: Dec 2003 Posts: 2,953 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 2,953 | had the heater core checked and it does not leak and holds pressure. install it in truck and drive for an hour and the core drips. obviously something to do with the hot water in it. however my rad man to figure out how to check it in his shop under those conditions. any ideas? | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | olblu,
I have a vested interest in this thread!!! Couldn't you submerge the core in a bucket of hot water with several pounds of air applied to it. You can do this yourself with a couple of plugs from the hardware store and a bicycle pump. Keep us posted!
Stuart. | | | | | Joined: Oct 2002 Posts: 77 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2002 Posts: 77 | oldblu49 If the heater core checked good the next thing I would look at is the control valve.
jim | | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | If your Rad man is reputable and I assume he is, when he pressured the core up regardless of heat or not the core would leak if it had a hole or crack. I'm inclined to agree with 66/stepside.
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
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| | | | | Joined: Jan 2001 Posts: 428 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 428 | Also make sure the inlet and outlet tubes on the core are round and not out of shape from overtightened clamps. It doesn't take much out of round for the hose connections to leak there.
Bob | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Martin,
I feel the same as you...heat or not, it would leak under pressure. Looking through the forum at other threads on this same subject you see numerous references to the fact that it only leaked when hot, or it only leaked when the supply tubes were tweaked, or it only leaked in the winter etc. If the shop tanked the core, put pressure to it and got no bubbles, then, assuming the radiator guy wasn't blind, it wasn't leaking
This means that the heat affects it more than we think, or that the drip is coming from a faulty valve or a leaking hose...I would guess that the valve isn't hooked up and it's a hose. I bet a root beer on this same subject several weeks ago, and guess what...I'm down one can of soda! I hope we hear the outcome of this saga.
Stuart. | | | | | Joined: Jul 2004 Posts: 78 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2004 Posts: 78 | What pressure did the Rad Guy test it at? Check all your hose connections. I have seen heater cores not leak at 5 to 7 lbs but put 12 lbs to it and you could water your lawn with it. If you test it yourself watch the amount of pressure you apply. If it is the round core they are very expensive to repair correctly. If it turns out to be a block type core I would just have the core replaced.
Good Luck
Steve | | |
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