Lifter Valley Question
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From: New Jersey
Car: 1991 Firebird Formula
Engine: LB9
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Lifter Valley Question
Hi all, I've got a quick question about the lifter valley on an LB9 engine. I snapped the stud that is used to secure the thermostat housing, and have since pulled the intake manifold. I have to scrape the old gaskets off and little bits are falling into the valley. I'm gonna try my best to clean out what I can, but I was wondering where the valley oil drains to. I heard it drains to the oil pan, but I wanted to make sure.
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Re: Lifter Valley Question
I heard it drains to the oil pan

Use a vacuum cleaner to pick up as much of the debris as you can. Next time you do this, tape some newspaper or plastic sheeting or something, over the valley, to keep that from happening. Stuff something into the intake, exhaust, and coolant ports, some rags or paper towels or something, for the same reason.
Last edited by sofakingdom; Jan 12, 2025 at 09:01 PM.
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Car: 1986 IROC Z
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Thread Starter
Junior Member
Joined: Nov 2021
Posts: 29
Likes: 5
From: New Jersey
Car: 1991 Firebird Formula
Engine: LB9
Transmission: Five speed
Axle/Gears: 3.42
Re: Lifter Valley Question
Sounds good. I think I did pretty good keeping the ports clean but it was tough keeping the whole valley clean with a plastic bag.
Thread Starter
Junior Member
Joined: Nov 2021
Posts: 29
Likes: 5
From: New Jersey
Car: 1991 Firebird Formula
Engine: LB9
Transmission: Five speed
Axle/Gears: 3.42
Joined: Sep 2005
Posts: 28,030
Likes: 2,500
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Lifter Valley Question
I definitely saw it on one of these forums

Wherever you saw that, needs to be un-seen.
Thread Starter
Junior Member
Joined: Nov 2021
Posts: 29
Likes: 5
From: New Jersey
Car: 1991 Firebird Formula
Engine: LB9
Transmission: Five speed
Axle/Gears: 3.42
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