all u with mandral bent down pipes - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-01-2006, 01:08 PM   #1
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Default all u with mandral bent down pipes

i just called 10+ exhaust shops in the area.. not a single one can do mandral bending...

well actaully, one of them could, but not 3"

i called the shop back up from a little rinkadink town back home where i had my mandral done for the 95...

they can do it... 3" and all... thank god for small towns

she quoted me $12 for the 3ft of pipe with bends.. not bad!

then i asked about the installation, she suggested clamping.. i said welding... she said call back later when her husband is in...

my question... would i even want to think about clamping this?

doesnt the pipe have to have a special fitting on the manifold end and what not?
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Old 02-01-2006, 01:15 PM   #2
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As far as I know, the exhaust always clamps to the manifold/header. The pipes are intended to be replaced, but in theory manifols should last the life of the car/engine. Wouldn't make much sense to weld them together....

From the manifold back, though, you definitely want it welded
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Old 02-01-2006, 01:21 PM   #3
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ok maybe i said that wrong...

should there be a peice welded to the top of the downpipe to bolt to the manifold

welds after that make sense

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Old 02-01-2006, 01:22 PM   #4
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I've heard that you want to clamp everything, because of vibration and movement of the exhaust pipes and stuff putting undue stress on the manifolds/headers. Granted, the old hot rodder who told me this was pushin 600 horse with a wild cam, so the engine moved around a LOT! Maybe with the bonne'* you can weld it, but I had mine all clamped. No problems yet!
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Old 02-01-2006, 01:37 PM   #5
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Oh boy...lol

Andrew..the pipe to manifold has a flare and a piece that slips on and can spin etc for mounting. The other end would typically have a flange welded on it to bolt to the flange on that catalytic.
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Old 02-01-2006, 01:42 PM   #6
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thanks bill... i can visualize that now...

the exhaust guy should know what to do with that flare...

does this car have the same donut gasket as my 95 did?
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Old 02-01-2006, 01:43 PM   #7
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Quote:
Originally Posted by harofreak00
thanks bill... i can visualize that now...

the exhaust guy should know what to do with that flare...

does this car have the same donut gasket as my 95 did?
No

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Old 02-01-2006, 01:47 PM   #8
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Quote:
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No
Am I right about what I said?
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Old 02-01-2006, 02:22 PM   #9
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Quote:
Originally Posted by BillBoost37
Quote:
Originally Posted by jr's3800
No
Am I right about what I said?
I think yes...

On the 97+ bonnevilles its a gasket of sorts... Looks a lot simmilar to what youd see on a Quad 4, or even an Accord exahust... Just being on a larger scale...

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Old 02-01-2006, 10:15 PM   #10
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*^$%*(^*)!~!!!!!!!!

called the shop back tonight...

apparently.. the wife did not know what mandral bending is... he cant do it either.. WTF...

i know a bunch of u have done it... how did u do it???

what is so different about the W body ones
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