Exhaust question

Parley with regards to your 1987 to 1991 Bonneville, Olds 88, Olds 98 86-90 or Buick Le Sabre, Le Sabre T-Type and Park Avenue 85-90 . Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
Post Reply
ratmonster
LE Member
Posts: 8
Joined: Sun Mar 20, 2016 7:00 pm
Year and Trim: 1989 Bonneville LE
1993 Roadmaster Ltd
Location: Coastal NC or a buffet near you!

Exhaust question

Post by ratmonster »

My first question! How exciting!

Okay, maybe that was a touch dramatic. Anyways, I roll straight gangsta mack in my 1989 Bonneville LE. For an older car, she hasn't given me any real trouble yet, except some leaks around the front and rear windshields. But that is sorted for now, and I really like the car.

One thing that bothers me, though, is the placement of the exhaust. It seems to be where Pontiac intended, and seems to hang straight. But it is just situated so low. Has anybody else been bothered by this? Is there a solution, or does it have to be this way for safety reasons, I.e. otherwise it would blow up the gas tank or something? Can I safely resituate it higher? We drive on a lot of really bad roads around here and I am afraid we will eventually destroy it. Plus, it's ugly. Thanks!
Last edited by ratmonster on Wed Mar 23, 2016 2:32 pm, edited 1 time in total.
User avatar
MattStrike
Certified Bonneville Nut
Certified Bonneville Nut
Posts: 4760
Joined: Tue Aug 25, 2009 8:32 pm
Year and Trim: '99 Montana
'04 Dirtymax
'97 Camaro
'92 Trofeo
Location: SE Michigan

Re: Exhaust question

Post by MattStrike »

I always thought the rear bumper skirt could come down a little lower to hide the exhaust. If you had a good shop, or the tools to DIY, you can adjust the low hanging around the tank area. But I wouldn't let it get closer than a 1" air gap without using header wrap and/or a heat shield.
Boost addict
Image

The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67
ratmonster
LE Member
Posts: 8
Joined: Sun Mar 20, 2016 7:00 pm
Year and Trim: 1989 Bonneville LE
1993 Roadmaster Ltd
Location: Coastal NC or a buffet near you!

Re: Exhaust question

Post by ratmonster »

I thought about header wrap as a possible ingredient to doing this.
User avatar
RJolly87
Certified Bonneville Nut
Certified Bonneville Nut
Posts: 5403
Joined: Tue May 27, 2008 8:53 am
Year and Trim: 1993 Buick Park Avenue
1994 Buick Regal Custom
Location: Las Cruces, NM

Re: Exhaust question

Post by RJolly87 »

If you turn the radio up a bit, you won't be able to hear it scraping on things.

For quite some time, the rear struts in the Park Avenue were not holding air, so when loaded, the rear end was often closer to the ground than it should have been, and scraped on EVERYTHING, even the road if there was enough people back there and we were bouncing around enough.

After having the struts replaced, it's better, but not by much. I still tag it pretty frequently on anything beyond 'normal'.

The front end is not much better. The subframe is too short to hang over curb stops, and the engine and transmission pan are at the same level if not slightly lower (already hit the transmission pan pretty good once).
~Randall~
ImageImage

1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place
Post Reply