L98 Early Valve Covers
Thread Starter
Racer
Joined: Apr 2009
Posts: 354
Likes: 0
From: Gurley Alabama
L98 Early Valve Covers
Can somebody post a photo of how the pipes from the PCV & air connections run between the valve covers & injectors to the intake & throttle body on an '86 engine?
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
I don't have a picture, but you should have metal tubes on both sides. They attach to the top valve cover bolts. They also have tabs to attach plastic covers that hide the injector wiring harness.
A short 3/8 rubber hose goes from the metal tube to the PCV. On the other end, a 3/8 hose connects the metal tube to a fitting on the intake manifold. On the breather side, they have a special grommet and rubber 90 on the valve cover. Then there's a short metal tube to another rubber 90 that connects to a longer metal tube.
If you don't have the metal tubes, you can easily route rubber hose.
A short 3/8 rubber hose goes from the metal tube to the PCV. On the other end, a 3/8 hose connects the metal tube to a fitting on the intake manifold. On the breather side, they have a special grommet and rubber 90 on the valve cover. Then there's a short metal tube to another rubber 90 that connects to a longer metal tube.
If you don't have the metal tubes, you can easily route rubber hose.
Thread Starter
Racer
Joined: Apr 2009
Posts: 354
Likes: 0
From: Gurley Alabama
I've got the metal tubes & rubber elbows & everything except maybe the plastic tabs...but for the life of me can't bet them to go on like you described.
Oh, what goes on the 2 studs on the intake manifold on both sides just above the valve covers?
Oh, what goes on the 2 studs on the intake manifold on both sides just above the valve covers?
Safety Car
Joined: Jan 2008
Posts: 3,939
Likes: 1
From: Vero Beach Florida
The metal tubes bolt to those I believe
Thread Starter
Racer
Joined: Apr 2009
Posts: 354
Likes: 0
From: Gurley Alabama
Yep, I'm figuring that out slowly....got the air tube on the driver side bolted down with hose from hole in valve cover into it & hose from it into pipe coming out if intake.....there's another hose coming out of that pipe going, I'm guessing to the air pump (which I'm eliminating).
On the passenger side, I see how it fits but must have bent it just a little when I took everything apart.
Next, I've gotta figure out all the little clips that hold the plug wires below the valve covers....don't have all of them so I guess its a trip to my Chevy dealer.
Thanks
Oh, I'm installing this L-98 TPI in my '77 C3 & have/am doing away with all emissions pieces/parts.
On the passenger side, I see how it fits but must have bent it just a little when I took everything apart.
Next, I've gotta figure out all the little clips that hold the plug wires below the valve covers....don't have all of them so I guess its a trip to my Chevy dealer.
Thanks
Oh, I'm installing this L-98 TPI in my '77 C3 & have/am doing away with all emissions pieces/parts.
Instructor
Joined: Oct 2009
Posts: 202
Likes: 9
From: Tucson
I just went throught the same issue on my '85. On the passenger side I went to my Chevy dealer and bought the shaped hose that runs from the top TB fitting to the rear vent on the valve cover. It's for an '88 up Vette. Its called a crankcase vent hose. I used the original 90 degree fitting on the valve cover, then used a brass fitting to adapt the 90 from the valve cover to the new hose. It was a couple bucks. The cool part? The hose was like $18 bucks from the dealer. Hell yeah!
This setup works good, and looks really slick because the '88 up hose fits really nice.
This setup works good, and looks really slick because the '88 up hose fits really nice.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Racer
Joined: Apr 2009
Posts: 354
Likes: 0
From: Gurley Alabama
nutz4c4: thanks...that's the way I thought they should go....tell me, please, the long hose off the pipe on the driver side - could it go to the headlight vacuum system on my '77 car?
Melting Slicks
Joined: Nov 2005
Posts: 2,736
Likes: 0
From: WAY UPSTATE NY
Been a while since I messed with a C3...
Le Mans Master
Joined: Feb 1999
Posts: 6,470
Likes: 2
From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work
St. Jude Donor '10
