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#742924 - Wed Apr 27 2011 05:43 PM Heater core pressure testing  
magfarm51  Offline
Shop Shark
Joined: Aug 2005
Posts: 404
Kuna, Idaho
I know heater cores have been a frequent topic but I couldn't find much on doing your own pressure test. I saw Denny's setup but I'm not a machinist and was wondering if anyone else successfully pressure tested their own heater core.


Allan
-----
1951 GMC 1/2-ton
Two 1953 Chevy 3100 5-window
Here's the most recent one
Synthetic Lubricants


#742935 - Wed Apr 27 2011 06:06 PM Re: Heater core pressure testing [Re: magfarm51]  
Hookalatch  Offline
Shop Shark
Joined: Apr 2009
Posts: 478
Cottonwood, CA
The local radiator shop only charged me $8.00 to test mine.
Not something I expect to do again so I went that route.

Chuck


#742946 - Wed Apr 27 2011 06:50 PM Re: Heater core pressure testing [Re: Hookalatch]  
51 ashton  Offline
Shop Shark
Joined: Apr 2005
Posts: 1,193
kempton,pa
yeah, i did with mine in the 40. i hooked up a rubber hose to one connection with a pipe nipple with a tee in the end of the hose i put a 0-15lb gage on a port of the tee and a ball valve on the other port. i took my garden hose and made it to fit the other connection on the core open the ball valve and slowly supply water to the core at 5 psi and when all the air stops coming out close the ball vavle and slowly pressurized the core to 5psi and turn off water supply. if its still holding pressure 15 minutes later and the core is still dry then it doesnt leak. if its sitting in the sun while your doing this the presuure will rise


#742948 - Wed Apr 27 2011 07:05 PM Re: Heater core pressure testing [Re: 51 ashton]  
Denny Graham  Offline
Extreme Gabster
Joined: Oct 2006
Posts: 10,634
Sandwich, IL
All I can add is don't go over about 7-8 psi or you will warp or pop the cooling tubes. 5 psi would be ideal pressure for a test. Using air pressure and a dip tank will pin point any leaks better than water pressure.

DG

Last edited by Denny Graham; Wed Apr 27 2011 07:06 PM.

#743637 - Sat Apr 30 2011 06:34 AM Re: Heater core pressure testing [Re: Denny Graham]  
magfarm51  Offline
Shop Shark
Joined: Aug 2005
Posts: 404
Kuna, Idaho
I found an older radiator shop with a young man running it and he charged me $10 to pressure test it, using air pressure and a tank just as Denny suggested. No leaks! dance


Allan
-----
1951 GMC 1/2-ton
Two 1953 Chevy 3100 5-window
Here's the most recent one
Synthetic Lubricants

#743649 - Sat Apr 30 2011 11:25 AM Re: Heater core pressure testing [Re: magfarm51]  
Denny Graham  Offline
Extreme Gabster
Joined: Oct 2006
Posts: 10,634
Sandwich, IL
Ten bucks well spent Allan. I had a friend that ran a radiator shop in town here for forty years. He's the one that told me about over pressurizing the heater cores. The old cores tubes were extreamly thin and even a few pounds over can damage them.
DG


#745420 - Sat May 07 2011 01:20 PM Re: Heater core pressure testing [Re: Denny Graham]  
twotone  Offline
Shop Shark
Joined: Nov 2009
Posts: 621
Iowa
I saw a nice Air Flow on Ebay I wanted to bid on but the guy said he pressure tested the core to 40 psi and it was good big_eek I either avoided a scam or missed out on one impossibly strong core. Yeah, right wink


#745993 - Mon May 09 2011 11:37 PM Re: Heater core pressure testing [Re: twotone]  
40casey  Offline
Shop Shark
Joined: Mar 2011
Posts: 481
NC
twotone, I think I saw that same heater on Ebay and when I saw that "40 psi", I said well, that's junk now!!! It didn't even occur to me that that might be a scam!! RED FLAG! We all need to be careful.....


A day without sunshine is like, well, ..... dark!

1940 Chevy 1/2 ton pickup "KC"
http://s1237.photobucket.com/albums/ff466/40casey/

#746680 - Thu May 12 2011 01:02 PM Re: Heater core pressure testing [Re: 40casey]  
mapleleaf  Offline
Shop Shark
Joined: Sep 2002
Posts: 3,148
NS
I just got one done here locally ..it was not cheap..but it did pass.

For that price I would do it myself next time and rig up some low pressure air system.



Moderated by  Rusty46 

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