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T'ing off crankcase vent? by Laurentian on 03 Jul, 2010 17:57
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Hi, may have done a real boner move on my AAZ
New to turbos but been driving NA's for ever...
AAZ 325,000 km with K14
Said K14 was very worn and would use LOTS of oil
like 1 L per 250 km's, running on Rotella
Anyhow was usure what to do last year and decied
to T off the crank vent from valve cover to armosphere.
Put a small plug in the rubber intake after filter
and vented down under car with rubber hose.
Just wanted to keep oil out of intake and keep a possible
runaway from happening.Then read here that VW did that
for some type of intake valve lubing so took the plug outlast fall.
Now here's my mistake : I left the vent T off hose attached thinking
that and pressure coming out of the crank vent would negate
any draw or vacume coming from the after filter rubber intake boot.
( vented back both to intake boot and under car simultaneously )
Car was at DMF lastr week for a newer but still used K14 and Dom freaked when
he saw my set-up. Apparently I may have been drawing garbage into
the vent tube from under the car !!
I had him pull my dumb set-up after getting chastised and was somewhat
embarrased at my lack of foresight.
Could it of been that bad?
Car does not smoke anymore at start up with new turbo.
About half the haze / greyish black soot now when spooling on heavy accel.
Motor seems still very Ok.
Luckily only ran like that for a month or two in reasonable weather
oonly to save what's left of my floor until a rework this summer.
Was driving the 1.6D N/A all winter.
Please comment and advise on whether or not this was so bad.
I just got the AAZ back last night, reason for the post.
Yes I will change the filter / oil tomorrow!
Hugh -
#1 by burn_your_money on 03 Jul, 2010 19:18
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So basically you left a hole in the intake pipe between the turbo and air filter?
If it's still running then it wasn't that bad. If I were you I would take the intake pipe off and clean it out. The oil residue in there tends to cause a lot of dirt and dust to stick to it. You don't want it slowly migrating into your engine. -
#2 by Laurentian on 04 Jul, 2010 09:07
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Thanks Burn,
Yes was venting crankcase into aintake as stock set-up with the
added feature of having an extra vent down under car
from the crankcase source ( hence the T-off )
Like this :
Crankcase vent--------------rubber intake boot after filter / before turbo------> TURBO
I
i
I
i
I
i
I
UNDER CAR ABOUT 24"
Thanks,
Hugh -
#3 by burn_your_money on 04 Jul, 2010 11:17
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Yeah just take the boot off and clean it out. Probably nothing to worry about.
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#4 by Laurentian on 04 Jul, 2010 17:55
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Thanks, I'll check it out and report backlater this week.
Car off to Pascal Cloutier in St-Jérôme, blew a front brake line
running after some kids today in the industrial park.
They were testing shop doors and peering into cars.
Pretty sure it was them that lifted my wallet out of
my other Jetta last week, window was down due to broken regulator.
More later ! -
#5 by Smokey Eddy on 05 Jul, 2010 00:59
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I want to run a hose from the cam cover back down to the block. Is this do-able?
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#6 by Smokey Eddy on 05 Jul, 2010 01:09
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by do-able i mean will i be actually doing anything by doing this. I have a breather on the cam cover and a hole on the AAZ block for the stock venting method. I noticed there is a hole on the back and on the front (the front of the AAZ has a hole and so does the 1.6 block... but with a cover for both blocks...)
Could this be an advantage for 1.6 drivers to run the cam cover vent to this hole on the front of the block opposed to the intake?
I don't like the mess that ensues from running the blow by and/or oil vapour into the intake... it makes the intercooler clog up with oil and just all the piping a mess to deal with. -
#7 by Smokey Eddy on 06 Jul, 2010 15:55
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bump?
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#8 by burn_your_money on 06 Jul, 2010 19:02
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I don't think you would get any benefit from doing that and it may actually be bad for the engine. On the AAZ they could have done that but instead they chose to add the extra vent down to the "lift pump" hole on the block. I'm sure the bean counters would have loved to delete the tube from the valve cover to the intake.
It's my belief (completely unproven) that an oily intercooler is good for your engine. The oil will trap any fine particles that get past your air filter thus saving your rings -
#9 by Rabbit on Roids on 06 Jul, 2010 20:42
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and if you ran the line off the valve cover to the crank case, where would the crank case gasses vent to? they would push oil right past your seals, you wouldnt be able to keep oil in your engine. and if your engine just burns the crank case fumes, then you dont have to smell them. i dont think they smell that pleasant..
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#10 by Laurentian on 07 Jul, 2010 07:20
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Smells like roofing tar
Trust me you want to burn the fumes...