Oil in Upper Intake
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Tuned
Joined: Feb 2007
Posts: 414
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From: Kingman, Ks
Oil in Upper Intake
When I had my throttle body off I looked inside the upper intake and noticed some oil or some liquid (about a couple tablespoons worth) pooled at the end of the intake. Now is this normal or is there something happening that shouldn't be??
Hotshot
Joined: Sep 2001
Posts: 11,958
Likes: 228
I have had similar oil show up on my truck in the past. It was usually just a small amount inside the plastic/rubber intake tube before the throttle body. I think it is more common on the mass air trucks, because the breather hose attaches to the intake tube. On speed density trucks, it connects to the bottom of the air filter box and has its own paper filter. I thought about rerouting mine or just putting a breather filter on the end of the hose that connects to the oil cap filler neck, so that it doesn't go into the intake. I don't know if this will have adverse affects or not though.
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
never seen an intake on these motors without that so i would say it is normal.
Thread Starter
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Tuned
Joined: Feb 2007
Posts: 414
Likes: 0
From: Kingman, Ks
Well I figured it must be pretty common because of that breather hose that goes into the intake tube. There is just no way around it unless you make a modification like TexasGuy said. I figured that that must be where all the buildup behind the butterflies on my throttle body came from, because other than that little bit of oil, all that is supposed to come through there is air.
Thanks guys.
Thanks guys.
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Tuned
Joined: Feb 2007
Posts: 414
Likes: 0
From: Kingman, Ks
I have run seafoam through the brake booster line about 200 miles ago. How is running seafoam through the brake booster line gonna clean up the upper intake? Where does the brake booster line go to? For some reason I thought it went to someplace other than that.
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Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
If you pull it of at the booster it runs directly into the upper intake. Won't clear out the throttle body though.
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