Oil in intake hose, why?
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Member
Joined: Mar 2001
Posts: 42
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From: Warrington, Pennsylvania
Oil in intake hose, why?
I haven't been to this site in a few month's, but now I am back with a question that I need an answer to.
I was installing a cone filter on my MAF when I noticed that the intake tube was filled with oil.
What causes this? Is it bad or not to worry?
My truck only has 1600 miles. I have only seriousy taken it WOT only once. Am I breaking it in too easy?
Anything you could tell me about this would help.
I was installing a cone filter on my MAF when I noticed that the intake tube was filled with oil.
What causes this? Is it bad or not to worry?
My truck only has 1600 miles. I have only seriousy taken it WOT only once. Am I breaking it in too easy?
Anything you could tell me about this would help.
Senior Member
Joined: Apr 2001
Posts: 5,939
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From: Warner Robins, Ga, CSA
DAS(do a search)
I'm new too, but it seems to be caused by oil being sucked into the intake under deacceleration. A lot of guys have noticed this.
A 'possible cure' is installing an oil breather filter in place of the oil cap. But, if you do this, you will need a chip to compensate for 'extra air--lean condition. See LightningForce or JDM.
Btw, if you ask "am I breaking it in too easy", you probably are. I went to wot every day or so from 200 miles on up. But, it's your L; do as you see fit.
Good luck,
Dan
A 'possible cure' is installing an oil breather filter in place of the oil cap. But, if you do this, you will need a chip to compensate for 'extra air--lean condition. See LightningForce or JDM.
Btw, if you ask "am I breaking it in too easy", you probably are. I went to wot every day or so from 200 miles on up. But, it's your L; do as you see fit.
Good luck,
Dan
Senior Member
Joined: Jun 2001
Posts: 856
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From: Bealeton, VA
Lightninrod is exactly right, oil gets sucked up the intake on deacceleration and gets on the filter boot. A cure for this is the oil breather cap, and YES you do need to have a chip so you don't get soft codes on the PCM. I have had my cap for about a month now and I just checked it the other day and no oil to be found!!!
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Joined: Apr 2000
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From: On the side of the Road attempting to explain 135 miles per hour
A few of us opted to remove the "straw" leading from the driver's side valve cover to the intake boot.
Not sure if this requires changing your chip. I think not but mentioned it anyway.
Total cost: $20 All parts available at Auto Zone.
**note** no cleaning of the throttle body was preformed prior to photo shoot.
more pics in my gallery linked in my sig.
Not sure if this requires changing your chip. I think not but mentioned it anyway.
Total cost: $20 All parts available at Auto Zone.
**note** no cleaning of the throttle body was preformed prior to photo shoot.
more pics in my gallery linked in my sig.
Last edited by Speedin Bob; Jul 22, 2001 at 07:02 PM.
Senior Member
Joined: Dec 2000
Posts: 1,514
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From: Auburn Wa
I suspect the oil is being pulled into that rubber boot on acceleration, since on decel there is no way for vacuum to be there with the throttle blades closed. Also I think the oil is being helped up that tube by crankcase pressure build up(Blowby) while at WOT
Anyway some guys are claiming that running only 5 to 5 1/2 quarts of oil in the crankcase helps with oil control alot. I have always run 5 1/2 in mine (but for different reasons)
and have never had much oil up there.
Dale
Anyway some guys are claiming that running only 5 to 5 1/2 quarts of oil in the crankcase helps with oil control alot. I have always run 5 1/2 in mine (but for different reasons)
and have never had much oil up there.
Dale