Blow by/blow by gauges do they really tell you much?
#1
Blow by/blow by gauges do they really tell you much?
Who makes them (hamburger, B&B) and how much do they really tell you?
Heres a thought.. on a running engine at WOT vs idling is it possible for a motor with no signs on blow by at idle to push lots of oil past the rings/valve seals due in part to a restrictive exhuast?
https://ls1tech.com/forums/showthrea...00#post3208900
Heres a thought.. on a running engine at WOT vs idling is it possible for a motor with no signs on blow by at idle to push lots of oil past the rings/valve seals due in part to a restrictive exhuast?
https://ls1tech.com/forums/showthrea...00#post3208900
#3
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Bad rings can seal decently at idle and seal like crap at wot when combustion pressure begins to rise. Valve guide usually don't leak into the combustion chamber for very long after startup.
#5
If you're talking about a leakdown tester, they're used w/ the engine shut off only...can't viably use them with the engine running.
They won't test for ring flutter like the '01 engine ring packages are prone to, but they'll very accurately test static ring sealing and valve sealing. You'll get a nice audible (with a mech stethoscope) hiss where the air is escaping.
Best application is testing all 8 cyls and measuring variation between cylinders.
They won't test for ring flutter like the '01 engine ring packages are prone to, but they'll very accurately test static ring sealing and valve sealing. You'll get a nice audible (with a mech stethoscope) hiss where the air is escaping.
Best application is testing all 8 cyls and measuring variation between cylinders.
#7
That's pretty cool, thanks for the correction. I guess you'd have to disable the PCV while testing with that, but it would give you a good indication of crank case pressurization.
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I'm just throwing this out there...
If the rings weren't orientated correctly when the engine was assembled, they could cause a similar problem. i.e. The gaps almost lining up vertically. I've seen it once, and heard about a few other cases. Food for thought.
If the rings weren't orientated correctly when the engine was assembled, they could cause a similar problem. i.e. The gaps almost lining up vertically. I've seen it once, and heard about a few other cases. Food for thought.
#10
Originally Posted by GrannySShifting
I could see it giving you a reading but does it have enough resolution to really tell you anything is what Im wondering you know what I mean?
For the questions you're asking I'd go with a leakdown tester instead of this instrument.