Quick Question About Blow-By

[USNENFTS]

Don't mind the mess, was working on an install in this pic ..... So the other day when I pulled my turbo, the intake pipe and compressor side had a lot of oil in there. This is here because my CDR valve goes from the valve cover into the intake like this :

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My question for you all is what is considered excessive blow by? I am pulling my engine so if I have "excessive" blow-by I will fix that while the engine is apart. How much do you all find in your intake? I know that blow-by is "natural", just how much?

 

[IDIoit]

this is why we screw with the CDR!
in effect, youre sucking in oil.
some people do a RDT.
some people build a catch can,
i made a RDT thats plumbed into the exhaust.
everyone said i would get oil in my exhaust.
i havnt noticed any.....

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[USNENFTS]

I feel dumb now.... Never really though about the whole "vacuum" effect. I will probably modify that while the engine is removed

 

[IDIoit]

dont feel dumb, instead... feel informed

 

[79jasper]

I would go catch can then back into the intake. Aka separator.


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[C_Luft]

More than likely your cdr is bad, unless your engine is really worn out or not properly cared for by previous owners. A quick way to check blow by is to pull the oil cap when the engine is running.

Here is a quick video of my old engine that the previous owner didn't change the oil filter for 30,000 +/- miles.

http://youtu.be/VAggOk5ID_A

 

[FoolhardyIDI]

That is one ruff running engine.

 

[USNENFTS]

It's a brand new CDR valve! I hope it ain't bad, that !@#$ was spendy from ford! I think I'm gonna RDT it haha!

 

[79jasper]

You'll regret it.

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[USNENFTS]

You'll regret it.

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Uh oh, why's that?

 

[IDIoit]

they smoke alot, and drop oil where you dump it at....
experiment with it... youll find somthing that works for you....... eventually lol

 

[79jasper]

Most hate the oil vapor smell, seal leaks, etc.

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[TahoeTom]

http://www.oilburners.net/forums/showthread.php?67332-RDT-Into-Exhaust&highlight=road+draft+tube
This thread has some options to consider. Blow by is a funky aspect of these engines. You need to rout it back into the intake through the CDR or to the atmosphere using a road draft tube (RDT). If the crankcase pressure has nowhere to go it will push oil past the seals. I think some sort of catch can between the crankcase and CDR is the best solution. I have the same Hypermax turbo system as you, and even my catch can is still allowing some oil through. A better place to tap the crankcase vapors is a Banks style adapter on the injection pump gear cover. The valve cover is so close to the CDR on the Hypermax setup there isn't room to add a catch can.