Exhaust Manifold - 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.

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Old 05-30-2007, 03:10 AM   #1
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Default Exhaust Manifold

Hi all, my Bonnie has some serious exhaust problems. I brought it in for the loud exhaust noise it was making ,and the shop said My manifold is broken and quoted me, 1100.00 to fix it

Does this sound right?? What are my other options???
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Old 05-30-2007, 03:39 AM   #2
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Where are you located? Are you located where gold leaves grow on trees?
You should be able to get a good used manifold off www.car-part.com for under $50. Shop labor at a (RAPE) rate of $75/hr should be about $150. Gaskets can be had from most parts stores for under $15.
You will want to have the replacement manifold checked for cracks by a machine shop prior to installation so they can weld/repair the cracks.... Might as well just have yours welded and save the cost of a replacement.
I am guessing your car is a 92-95 supercharged 3800, correct? If you replace your best bet is to find a low-mileage manifold off a non-supercharged Bonneville. They typically don't produce enough heat to crack the manifolds unless the exhaust is plugged.
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Old 05-30-2007, 07:46 AM   #3
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For 1100, you can buy an entire bonneville.

Seek a second or third opinion.
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Old 05-30-2007, 08:59 AM   #4
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As said, that price is highly inflated. It WOULD help us answer your question better if you told us what year and trim level your car is, but even without that we are fairly confident in saying that you should be able to replace both exhaust manifolds for much less than that.
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Old 05-30-2007, 09:26 AM   #5
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It would help to know what year you have so we can tell you what years are compatible.

Please put that information in your signature by editing your profile.
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Old 05-30-2007, 04:22 PM   #6
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Quote:
Originally Posted by OLBlueEyesBonne
Where are you located? Are you located where gold leaves grow on trees?
You should be able to get a good used manifold off www.car-part.com for under $50. Shop labor at a (RAPE) rate of $75/hr should be about $150. Gaskets can be had from most parts stores for under $15.
You will want to have the replacement manifold checked for cracks by a machine shop prior to installation so they can weld/repair the cracks.... Might as well just have yours welded and save the cost of a replacement.
I am guessing your car is a 92-95 supercharged 3800, correct? If you replace your best bet is to find a low-mileage manifold off a non-supercharged Bonneville. They typically don't produce enough heat to crack the manifolds unless the exhaust is plugged.
Not gold leaves , just silver!!. Good advice. So welding is another option?? Thats good to know. Do u think it will be around 2.0hrs. labour to remove?? Providing all goes well.

The car is 92SSei and car part .com list several for this model. I'm not to sure which one it would be.

Tried updating my profile, not working...
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Old 05-30-2007, 04:28 PM   #7
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Quote:
Originally Posted by dads gt
Quote:
Originally Posted by OLBlueEyesBonne
Where are you located? Are you located where gold leaves grow on trees?
You should be able to get a good used manifold off www.car-part.com for under $50. Shop labor at a (RAPE) rate of $75/hr should be about $150. Gaskets can be had from most parts stores for under $15.
You will want to have the replacement manifold checked for cracks by a machine shop prior to installation so they can weld/repair the cracks.... Might as well just have yours welded and save the cost of a replacement.
I am guessing your car is a 92-95 supercharged 3800, correct? If you replace your best bet is to find a low-mileage manifold off a non-supercharged Bonneville. They typically don't produce enough heat to crack the manifolds unless the exhaust is plugged.
Not gold leaves , just silver!!. Good advice. So welding is another option?? Thats good to know. Do u think it will be around 2.0hrs. labour to remove?? Providing all goes well.

The car is 92SSei and car part .com list several for this model. I'm not to sure which one it would be.

Tried updating my profile, not working...
You might contact J Wikoff here (click on Moderators list and you'll see his name to click on). He probably has the manifold you are looking for. Might need some welding, but I am sure he will give you a better deal than a yard. Also, if it is the front manifold, it will take a max of 1.5 hrs to remove and reinstall the new one.
2 more things to prevent future cracking is to have the ports at the manifold flange (to head) welded externally and the factory internal weld ground down. Then have the manifold ceramic coated ($50 at a shop or do it yourself -there'* a link WillWren posted on here awhile ago) to promote the exhaust heat exiting the way it should, and also protects the exhaust manifolds from future cracking.
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Old 05-30-2007, 05:15 PM   #8
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You need manifolds from a 92 SSEi or Supercharged SSE only. Your manifolds are different than the 93-95 SSEi'*, and you have an EGR feed in yours where the non-supercharged 92'* don't. You literally have the only exhaust manifolds that were used for only one year/engine in recent Bonneville history. 92 Buick Park Ave Ultra manifolds should work also.
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Old 05-31-2007, 12:34 AM   #9
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I can check my set again, but after a first look, I couldn't find any cracks. Can you confirm which is needed, front or rear?
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Old 06-02-2007, 05:18 PM   #10
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Any updated info?
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