Blowby - is this okay?

[Brianshayne]

After most drives, I need to reseat my dipstick -- about an inch and a half or so.

Is this okay? Could my leaky valve cover gasket be causing this? (Sucking in air?) Also, notice not so much steam -- maybe smoke? Something wispy that comes off the valve cover gasket area while running.

Temps are good, coolant level is good.

Unrelated: Tried upping my fuel -- got it up, wasn't sure what kind of smoke SHOULD be present, and no EGT so I chickened out and turned it back down.

[CRSMP5]

when it runs away its too much blow-by...

vc leaks due to the same reason dip stick pushes  out... honestly...

i would add a catch can that has a return into the block via the plate by the vac pump.. so any oil it blows out will drain back in once off.. and run it till you can rebuild..

[libbydiesel]

If a catch can is added with a return to the block it must have a check valve in the drain or it increases the risk of runaway. 

[burn_your_money]

A leak in the vacuum system can cause extra air to enter into the engine. I'd investigate that. Thankfully it's not a MB so it won't take very long 

[damac]

I think I have been lucky thus far, even my nastiest used engines I have come across that had blowby out the filler cap, never pushed the dipstick out.

My 85 jetta came with an engine that had a good amount of blowby and I made a catch can out of pvc and stainless steel mesh balls stuff inside.  I could easily breath through it so it wasn't restrictive, and in the middle cavity I put a hose that goes to the old block off plate location.

I think it did help a bit as far as going into the end of the intake.

[CRSMP5]

ive seen them push oil up out of the dipstick... not like watergun.. that be sweet though.. but enough for the customer to *** abt the oil drops on the ground.....

libby.. at the point of time ive seen people build a catch can like that.. it was no longer fed into the intake... they were using it as a way to catch the oil to let it run back in... and sadly it worked for them... old cheap 1.5d users of the 80s...

[Brianshayne]

I understood about zero of this thread so far, sorry guys -- slower maybe, I'm still pretty dumb.

No oil out the dipstick -- some wispy from the valve cover (as it's leaking) only saw this once though, on a dry day.


No PCV on this motor? So catch can eh? How would I tell if it has one? Motor is stock at the moment, minus a very smallly adjusted fuel screw (was blowing vefore though)

[CRSMP5]

pvc built into the vc... never seen diesel one plug up...

no oil.. do not worry bout it.. i bet your dipstick has a vibration and it poppig up due to that...

[Brianshayne]

Oil filler is under pressure when you remove the cap -- normal too?

[burn_your_money]

On a running engine, very normal to have pressure under the oil filler.

I'm 30 minutes from you. If you want to swing by some time I can have a look at it and tell you what I think.

[air-cooled or diesel]

A leak in the vacuum system can cause extra air to enter into the engine. I'd investigate that.

this is the first thing to do. check all vac lines/connections, and brake booster for rust holes/leaks.
simple, effective step to knock off to check list.

[air-cooled or diesel]

On a running engine, very normal to have pressure under the oil filler.

I'm 30 minutes from you. If you want to swing by some time I can have a look at it and tell you what I think.

Oil filler is under pressure when you remove the cap -- normal too?

as long as oil isn't getting pushed out thru dipstick or valve cover area; which would indicate way over pressure inside. some pressure and pulsing is normal.

[Brianshayne]

If you'd be down, that'd be great. Once I learn, I learn - but I'm better visually. Maybe you can show me how to reattach my residual screw as well, seems to have come out

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