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logician logician is offline
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Join Date: Feb 2002
Location: San Francisco, CA
Posts: 604
I never had much success with your type of tester, mine purchased from our host a few years back. That tester is actually operates like the single gauge type, and the pressure used for the measurement is fixed at 30lbs. I think that's too low, and you can have problems with the rings or valves not seating for the measurement. Sometimes it helps to rotate the engine a few degrees with the pressure on to help seat them and get better results.

Get one of the real two gauge leakdown testers that let you set the pressure to 80lbs. Here is one example:

That's the tester that I use now. Price under $100.

__________________, Thunderhill, 30 Jan 2011

SM #34, '04 GT3, '73 911s, '70 911 2.7L PRC Toyo Spec #11
Old 02-14-2006, 09:32 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)