portable electric air pump for leak/compression test

[Michaeld998]

i'm looking for something portable (battery based) that can feed steady 70psi of air to my cylinders
and gauges for testing puposes. most of what i found is marketed as "tire inflators" which i didn't found a proper
adaptor to use for cars other than tires. any ideas ?

 

[RTM]

Do you really need to supply a lot of volume?

For calibration of Gauges here, we use a Druck, which pumps up and holds a very precise pressure. Seems overkill for most mechanical work, plus we are only pressurizing a small stretch of tube, so minimal volume and pumping.

Cylinders of what kind, and same question. Looking for leaks, or stroking manually, or ?

 

[Michaeld998]

i need to find leaks on engines in the range of 1.0 2.0 mostly. i read around that 80 psi is what most do
but that seems high so i said 70. i prefer it to be something self contained without the need for a power supply plug
as i'm living in a building at the top floor and that's is a bit inconvenient. also as quiet as possible so i can
hear where the leaks are from as my hearing is not the best

 

[Citation]

Off the wall suggestion, a nitrogen or perhaps CO2 bottle similar to the ones used for off roading tire refills.

DIY Nitrogen Tank and Refill Kit

Maybe I missed it, but I have yet to find a decent thread on this site discussing how make your own nitrogen refill kit. Here is how I went about it....

www.tacomaworld.com

No noise, no power but you can't refill it yourself.

Other suggestion is something like an aluminum tank quiet compressor. I have a CAT 5510A. It's not loud (think one of those window box fans on full), mine weighs about 35 lb but does require AC power. Not sure the tank would last long.

 

[dnschmidt]

Milwaukee makes a portable compressor: https://www.milwaukeetool.com/products/2840-20 Don't know if it has sufficient SCFM for what you want to do.

 

[stonesfan68]

Milwaukee has a battery-powered compressor. I don't know how loud it is.

Milwaukee Model # 2840-20-48-11-1850

 

[richfinn]

Do you mean for Cylinder leakage testing?

I would probably look at the Milwaukee Compressor (the tyre inflator won't cut it)

Jimmy from O'Rileys uses one for his mobile DPF cleaning videos.

O'Rileys Autos

O'Rileys Autos strive to be the best YouTube Channel for Mobile Mechanic Car Repair and Diagnostic videos. Weekly uploads of real life Repairs and Auto maintenance plus Diagnostic videos specialising in diesel & petrol emissions fault repairs. Automotive Repair Tutorial channel Diagnostic...

youtube.com

For Mobile testing I use an Oscilloscope and current clamp for relative compression tests (It's enough for my needs to pass the job on to a workshop).

 

[joecon]

if portability is important you could do in cylinder pressure testing with a scope and a lap top and learn more than a leak down test with less time and equipment. It would be more money but not in the long run if it was something you did often.