What to do if oil comes out of blowby tube?
When you block the blowby at high pressure the dipstick is the first place that blows out, your thumb will usually feel the higher than normal pressure instantly though. A manometer is cinch to make and will cost you 10¢. All you need is loop of clear tubing filled partially with water taped to a 1×4” and  a tape measure.
Can a bad Turbo drain line blow out oil?
Saw that happen on my dads truck. C15 with the breather tube right across from where the turbo drain line comes into the block. It was blowing out as much oil as air. Turbo seals fixed it. That will tell you pressure but not volume right ?
Can a bad Turbo cause a blow by?
Yes, I have seen turbos cause blow-by. Measure your blow-by then remove the oil drain hose from the turbo and run it into a pail and measure your blow-by again. That will answer your question.
What should the pressure be on a Cummins blowby?
Not sure on a Cummins but other diesel engine makers say the pressure coming out the blowby shouldn’t exceed 5 psi. Anymore indicates a valve or ring problem. If you don’t have a gauge setup to measure it just put your thumb over the end of the blowby, you should be able to hold it there without blowing off.
Why does the oil blow by when the engine is cold?
If they designed the piston for a snug fit when the engine is cold, the piston would seize inside the cylinder when it heats up due to thermal expansion. An under-sized piston leads to blow by when the engine is cold.
What’s the best way to fix an engine blowby?
Our advice is always to get everything clean first. Then you know where you’re at!” “There’s a very simple, low cost, DIY procedure almost anyone can do that will fix your engine blowby, if the engine is fundamentally sound.
How long does it take for an engine blowby pack to work?
“Over a period of 30 years, we’ve noted that, conservatively, 80% of engines that have undergone this procedure, have recovered good compression control and eliminated their blow-by.” This Blowby Pack will reduce Blowby Fumes, satisfaction guaranteed.