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Converting cooling system pressure tester to air?

joedodge

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What have you guys used to convert your cooling system pressure testers to air instead of pumping it? I'm considering using a brass needle valve to control flow.
 
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signcrafter

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Post number 4 in this thread shows mine, http://www.garagejournal.com/forum/showthread.php?t=205316&highlight=homemade&showall=1. I usually dial my shop air regulator down to about 50 PSI and then have better control with the regulator on the cooling tester, I get a little scared trusting one regulator with a 175 PSI shop air! I don't work on big cooling systems usually but they are great when you have a leak, you don't have to keep pumping up and then try to get over to find the leak. Just hook it up and find the leak.
 
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joedodge

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Hmm since I have my hand one I really didn't wana build a whole new one but convert mine to dual duty. Thanks for all input and help guys. I kept searching and found how welder guy added a needle valve to his il prolly so that
 

signcrafter

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Ya the only reason I made mine was because I had an old used stant tester and it got a hole in the tester itself so it was junk. But the hose and adapter and gauge were still good so I saved them and made this.

Do you have a link to this needle valve one?
 
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joedodge

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Quote:
Originally Posted by Ruger_556
I looked at those (SO, MAC, Matco sell the same one) but it seems kind of cheasy for how much they want for it.
Can make your own for about $5 in parts.
 

larry_g

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oregon
Joe; do not confuse flow with pressure. The rig you posted will do nothing to prevent you from dumping the full pressure of the house air into the cooling system. I would suggest that you use a regulator as well as the needle valve.

lg
no neat sig line
 
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