Plastic Intake plenum... Request for opinions 1997 SE - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-20-2006, 04:19 PM   #1
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jan 2006
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
jmandeville is on a distinguished road
Default Plastic Intake plenum... Request for opinions 1997 SE

I'm a Newbie. I've tried to look through some of the threads on this topic...

I have a 1997 Bonneville SE 158Kmiles. It looses a little antifreeze but the oil seems to be fine... I haven't had an oil analysis done however.

I believe I have a VIN "K" engine... 3.8L (naturally asperated )
I definately need to replace the upper plenum. I haven't started to disassemble the thing yet.

I wanted to get suggestions from the guys who have been through this already.

Should I replace just the upper or the upper and lower? Can/Should I make this determination actually prior to the disassembly in order to minimize downtime, or should I wait until I take the lower out and check it over... What should I look for on the lower?

I feel that I might as well put in,.... "the good stuff / parts" if I have to go through all the trouble..... What are the "good parts "?

Any suggestions or references to threads that you guys think would be helpful would be appreciated.

Thanks,

Jack
jmandeville is offline   Reply With Quote
Old 01-20-2006, 05:12 PM   #2
Senior Member
True Car Nut
 
Join Date: Jun 2004
Location: Rochester, NY (college)
Posts: 6,182
Thanks: 0
Thanked 0 Times in 0 Posts
corvettecrazy is on a distinguished road
Default

definately change the lower intake gaskets if they have not been changed before.
corvettecrazy is offline   Reply With Quote
Old 01-20-2006, 05:13 PM   #3
Junior Member
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

Search for "upper intake manifold" or "UIM" and you'll find a boat load of information here.

And welcome!
vital49 is offline   Reply With Quote
Old 01-20-2006, 05:17 PM   #4
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

And to answer your questions as CorvetteCrazy did...

yes replace the upper intake manifold
Yes replace the lower intake manifold gaskets only
BillBoost37 is offline   Reply With Quote
Old 01-20-2006, 05:23 PM   #5
Senior Member
Certified Car Nut
 
Join Date: Jul 2003
Location: Robbinsdale, MN
Posts: 15,408
Thanks: 0
Thanked 0 Times in 0 Posts
MOS95B is on a distinguished road
Default

The magic word for the UIM is "Dorman"...
MOS95B is offline   Reply With Quote
Old 01-20-2006, 05:25 PM   #6
Senior Member
True Car Nut
 
Join Date: Jun 2004
Location: Rochester, NY (college)
Posts: 6,182
Thanks: 0
Thanked 0 Times in 0 Posts
corvettecrazy is on a distinguished road
Default

oh and .... 89 INCH pounds..not 1 more. (I learned the hard way I guess)
corvettecrazy is offline   Reply With Quote
Old 01-20-2006, 05:27 PM   #7
Junior Member
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

Quote:
Originally Posted by MOS95B
The magic word for the UIM is "Dorman"...
Yep. Or, you can contact Bob Dillon and have him send you a sleeved upper intake manifold. Search for posts by him to find out all the details behind his theory. I'm running one of his and have had no issues in 16,000 miles or so....
vital49 is offline   Reply With Quote
Old 01-20-2006, 09:47 PM   #8
Senior Member
Posts like a Camaro
 
Join Date: Feb 2005
Location: Gilroy, California
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
Bob Dillon is on a distinguished road
Default

You rang?

Got a sleeved one sitting out in the garage and one coming in shortly from 96LeSabre.

$30 plus freight, and your promise to ship yours back to me freight prepaid. :

And yes, change the lowers.
Bob Dillon is offline   Reply With Quote
Old 01-21-2006, 12:36 PM   #9
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Read this... I did my intake in July...
http://www.bonnevilleclub.com/forum/...er=asc&start=0

Then go here for a lot more related info
http://www.bonnevilleclub.com/techinfo/?article=85

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 01-21-2006, 03:58 PM   #10
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default Lowers

We should also mention that Felpro gaskets have performed well for the BC club members.
I think Vital and JR had theirs apart after some miles and found no wear at all.
Please chime in here if you will.
SSEBONNE4EVA is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
intake plenum? bluefever General GM Chat 5 11-23-2004 08:39 PM
Another Plenum Bites the dust - opinions, ideas, anyone? viton1 1992-1999 9 08-18-2004 09:20 AM
Intake Upper Plenum Manifold replacement found glorkar General GM Chat 7 04-05-2004 12:25 AM
Cleaning Series I Plastic Plenum. dougworner 1992-1999 8 03-19-2004 02:29 PM
upper intake plenum 95 and on.. Custom88 General GM Chat 28 01-07-2003 06:52 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:59 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.