oil behind throttle body
Thread Starter
Instructor
Joined: Mar 2002
Posts: 167
Likes: 1
From: chicago il
oil behind throttle body
I have an 04Z. I changed the oil at 1k miles. Now at 3k miles, I noticed that the car has used about 3/8 of a quart of oil in 2k miles.
I looked and felt behind the back of the throttle blade and there is a little oil behind it.
My questions are is this normal to have a little oil behind the throttle body and is my motor still breaking in?
I have been driving it kind of hard lately.
I looked and felt behind the back of the throttle blade and there is a little oil behind it.
My questions are is this normal to have a little oil behind the throttle body and is my motor still breaking in?
I have been driving it kind of hard lately.
Drifting
Joined: Jul 2003
Posts: 1,796
Likes: 1
From: Annandale VA
Re: oil behind throttle body (cpd)
THis seems to be a common problem w/ LS1 engines, and is often attributed to oil coming into the intake via the PCV. The early years had the PCV plumbed from the passenger side valve cover. On the later years w/ the LS6-style intake, the PCV is plumbed from the valley cover under the intake.
The only solution I have seen that really eliminates the oil contamination is to use a catch can. There is a home-grown version called the "Greddy", but others are also available.
The only solution I have seen that really eliminates the oil contamination is to use a catch can. There is a home-grown version called the "Greddy", but others are also available.
Melting Slicks
Joined: Jan 2003
Posts: 3,251
Likes: 4
Re: oil behind throttle body (HITMAN99)
THis seems to be a common problem w/ LS1 engines, and is often attributed to oil coming into the intake via the PCV. The early years had the PCV plumbed from the passenger side valve cover. On the later years w/ the LS6-style intake, the PCV is plumbed from the valley cover under the intake.
The only solution I have seen that really eliminates the oil contamination is to use a catch can. There is a home-grown version called the "Greddy", but others are also available.
The only solution I have seen that really eliminates the oil contamination is to use a catch can. There is a home-grown version called the "Greddy", but others are also available.
:cheers:
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Re: oil behind throttle body (drcoffee)
I did this mod soon after I bought the car and was surprised at how much oil actually collects in the filter housing. Here are a few good links:
Illustrated instructions
The GReddy catch can option.
A picture of mine I have removed the filter element since this pic was taken, and it still seems to be working just as well.
:cheers:
Illustrated instructions
The GReddy catch can option.
A picture of mine I have removed the filter element since this pic was taken, and it still seems to be working just as well.
:cheers:
Melting Slicks
Joined: Dec 2000
Posts: 2,118
Likes: 2
Re: oil behind throttle body (cpd)
I use the Shogun Industries "evacuation breather canister" ....a much better engineered product with internal baffles and filtering (it polished up beautifully). I had to make a polished aluminum mounting bracket, a 2 into 1 manifold and stainless lines, but is works great..... very nice looking unit. http://www.shogunindustries.com/cgi-...item=FC62601-1
[Modified by HIGHRPM, 1:38 PM 5/6/2004]
[Modified by HIGHRPM, 1:38 PM 5/6/2004]
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
Re: oil behind throttle body (cpd)
We each are developing our own PCV catch system. We're learning that oil gets in the intake, it causes Knock and KR. Oil tends to flow to the back of the manifold into cylinder #7 which ends up breaking.
