Should I pull the Plenum?
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,484
Likes: 0
From: Nanaimo, BC
Should I pull the Plenum?
Quick one for you guys....
I pulled my TB off the other night in order to clean it, the IAC, etc.
Thought about pulling the plenum also well I'm at it, but decided against when it looked like the gasket kit for the plenum was going to be pricy.
Picked up the new TB gasket kit today.... and they had actually brought in the plenum kit AS WELL, because they wanted to be sure they were bringing in the right gaskets for me. Plenum kit was only $22.00 so I picked it up also.
Whaddayasay guys, should I pull and clean the plenum while I've got her apart? is ther anything particularly tricky about it. It appers to be pretty straight-forward.
(ps, for thsoe who read my post the other night, I have done the TB bypass as well, bought a little section of hose, a couple of clamps and a connector, and 2 caps for the inlet/outlet on the IAC.
TIA
I pulled my TB off the other night in order to clean it, the IAC, etc.
Thought about pulling the plenum also well I'm at it, but decided against when it looked like the gasket kit for the plenum was going to be pricy.
Picked up the new TB gasket kit today.... and they had actually brought in the plenum kit AS WELL, because they wanted to be sure they were bringing in the right gaskets for me. Plenum kit was only $22.00 so I picked it up also.
Whaddayasay guys, should I pull and clean the plenum while I've got her apart? is ther anything particularly tricky about it. It appers to be pretty straight-forward.
(ps, for thsoe who read my post the other night, I have done the TB bypass as well, bought a little section of hose, a couple of clamps and a connector, and 2 caps for the inlet/outlet on the IAC.
TIA
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,484
Likes: 0
From: Nanaimo, BC
Follow-up question as well.
I ended up with 2 TB gaskets...but they are slightly different, both in shape and material. I am wondering which one would be better to use.
The lighter one feels and looks more like cork (from NAPA) and doesn't seperate the 2 port holes, whereas the darker one (FelPro) feels more like a fibre product, and seperates the 2 ports.
Any thoughts on which is better.
I also picked up some gasket sealer/adhesive. Should I use this on all the gaskets?
THANKS GUYS!!!!!
I ended up with 2 TB gaskets...but they are slightly different, both in shape and material. I am wondering which one would be better to use.
The lighter one feels and looks more like cork (from NAPA) and doesn't seperate the 2 port holes, whereas the darker one (FelPro) feels more like a fibre product, and seperates the 2 ports.
Any thoughts on which is better.
I also picked up some gasket sealer/adhesive. Should I use this on all the gaskets?
THANKS GUYS!!!!!
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,484
Likes: 0
From: Nanaimo, BC
Originally Posted by bogus
the only reason to pull it is to grind it out and debur it... I guess you can clean it, but I have found they don't get as dirty as the TB.
It won't hurt, but those torx bolts are a BITCH.
It won't hurt, but those torx bolts are a BITCH.
Thanks Bogus,
Here is what she looked like when I took her apart the other night. Maybe I'll just save the plenum gasket kit for some point in the future when the plenum HAS to come off.
korvette4u suggested that I just leave it on and spray carb cleaner in there and that a lot of the build-up would burn out once I get her back together and running.
If that willa cheive a similar result that may be the way to go, rather than wrestling with the torx bolts.
Instructor
Joined: Jan 2003
Posts: 233
Likes: 0
From: IL
have you guys really looked at that picture?! Is that not a layer of carbon that is built up inside of the plenum? it for sure had carbon on the back of the throttle blades and I would think it would be much thicker farther back!
When I rebuilt my engine last year the inside of my plenum, tubes and intake were coated with carbon! thats got to cause a restriction!
When I rebuilt my engine last year the inside of my plenum, tubes and intake were coated with carbon! thats got to cause a restriction!
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Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
Originally Posted by black85vette
have you guys really looked at that picture?! Is that not a layer of carbon that is built up inside of the plenum? it for sure had carbon on the back of the throttle blades and I would think it would be much thicker farther back!
When I rebuilt my engine last year the inside of my plenum, tubes and intake were coated with carbon! thats got to cause a restriction!
When I rebuilt my engine last year the inside of my plenum, tubes and intake were coated with carbon! thats got to cause a restriction!
W
Drifting
Joined: Jan 2001
Posts: 1,408
Likes: 13
From: Dayton, Ohio
Which gasket to use?
Just my .02
I would use the TB gasket that is shaped like the one that came out
of your engine.
As long as your throttle blades are clean and open/close properly,
it should run just fine.
If you do go to the trouble of removing your plenum,
then at least remove the two restrictions at the bottom of the opening in front. That will offer some performance return for the trouble of
the R+R. It won't be a fully ported plenum, but it'll help.
I would use the TB gasket that is shaped like the one that came out
of your engine.
As long as your throttle blades are clean and open/close properly,
it should run just fine.
If you do go to the trouble of removing your plenum,
then at least remove the two restrictions at the bottom of the opening in front. That will offer some performance return for the trouble of
the R+R. It won't be a fully ported plenum, but it'll help.
Race Director
Joined: Dec 2004
Posts: 14,979
Likes: 2
Go here to see which gasket you should use. Everything you need to know about C4 Vette and Camaro/Firebird intake systems.
When I fixed the leaking front and rear intake seals, I used sealer on everything. I have read about too many times about vacuum leaks and decided I wasn't going to deal with that.
When I fixed the leaking front and rear intake seals, I used sealer on everything. I have read about too many times about vacuum leaks and decided I wasn't going to deal with that.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Originally Posted by ZD1
Dude, as long as you have emissions hooked up-you're gonna get that black stuff in there.
No, that stuff is blowby from the pcv system. The EGR won't foul the throttle body.
