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Old 11-08-2023, 06:58 PM
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so, which smoke tester should I get, rather than build another failure?

Quote:
Originally Posted by workingonit View Post
...I just tried to get my home-made smoke tester to work again, but it seems the heating element (a Performance Tool 120 Volt Soldering Iron) has burnt out, so I don't know if I want to try another element like it, though it worked OK for three test sessions, a year ago. My smoke tester is homemade, very low pressure, and probably not up to the job.
Attachment 83714...
I tried a different soldering iron to replace the burnt-out one; very low wattage, so there's little smoke. I guess the cheap design is not satisfactory, so I'm looking at smoke testers on Amazon, again.

But, I have a relevant question: how much output pressure do I need? I've read where you need about 1/2 psi, no greater than 10 psi, and have seen smoke testers putting out up to 20 psi, though most don't list the pressure.

My M54 has a running (at idle) vacuum of 22+ psi, so I'd assume that a tester putting out that pressure or less, wouldn't blow out seals (valve cover, rear main, etc). But, 50'sKid , a YouTuber from E46 Fanatics, built one using a low pressure propane regulator (.5 psi-about 10 psi max) because of fear of blowing out seals.

My failed tester used a simple HORUSDY Multi-Use Siphon Fuel Transfer Pump for Gas Oil and Liquids, with negligible pressure, but the smoke volume wasn't enough to judge anything by; testers I'm looking at on Amazon (and Ebay) run the gamut in pressures, and about half of them require you to furnish your own air supply.

I have four air compressors/pumps
  • 1) the hand pump, of course,
  • 2) a very old, small, Campbell Hausfeld 12v 100 PSI Inflator (without gauge or pressure adjustment),
  • 3) a PITTSBURGH AUTOMOTIVE 12V 150 PSI Compact Air Compressor from HF (w/gauge, but no pressure adjustment, IIRC),and
  • 4) a Husky 20 Gal. 175 PSI Portable Electric Air Compressor (with pressure adjustment, but it's unknown how low it'll operate at)
but again, what should I aim for, pressure-wise?

Any recommendations? I'm going to my garage to try adjusting my Husky's psi as low as I can, having never needed LOW pressure before.
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