wHY DOES OIL BLOW OUT OF MY VENT TUBE

[evldsl]

You know why oil blowsout of that steel tube that drops down on the side of my engine?

 

[lmills]

Yeh, cylinder pressure escapes past your rings and pressurizes the crankcase. Some do it worse than others. Higher boost applications are more likely to do it also.

 

[CPavlic]

Thats your blow by tube, a little is acceptable but if its covering your oil pan or even collecting on your transmission and further down you have a problem

 

[ScottLewis]

As above. I put a catch bottle on the tube of both my '98 and the "06 to help keep the garage floor clean. A little dripping is normal.



Dan

 

[LArnold]

same thing happened to my truck a mo ago,look at my post yuoll see what the boys wrote. sounds like an injector stuck and washed down a cylender.

 

[richardcoxid]

Normally aspirated engines the crankcase breather tube is routed to the intake manifold through a PVC valve. There is vacuum between the throttle valve and the intake manifold, which sucks the crankcase blow-by into the intake manifold thereby burning it.



On a TURBO CHARGED engine the whole purpose of the turbo is to push extra air at a positive pressure into the engine, therefore the intake manifold is at a positive pressure.



The crankcase blow-by has to exhaust to the atmosphere.



If the blow-by was piped into the intake upstream from the turbo (negative pressure area) the turbo blades, piping etc. would get coated with oil residue and gum up the turbo. Or if piped to the air filter it would also gum up the filter.

 

[Scooby]

There is a system that allows the oil to be "recirculated" into the system... . It had a special filter on it to seperate the oil residue from the oily air, returning the oil to the crankcase... ... . I had it on my 2001 and can't recall the name of it..... I want to say it started with a "W"..... Walker Engineering AirSep?... or something like that. Those of you on the TDR for while lwill ikely remember - I'm not even sure if the company is still in business. Anyway, it seemed to function fine, but it was an expensive item.

 

[lmills]

Yeh Scooby, it is the Walker Airsep system. I could be wrong, but I do not think they have a system for the common rails. At least it didn't a couple years ago

 

[AABEN]

On my 03 I run A quart low. Stop most of blow by Catch bottle do the rest