Hi Folks,

I'm about to re-weld the a-pipe that's causing the buzzing exhaust (3500 rpm land) on my 1995 Acura Integra GSR.

Can anyone help me with the part numbers for any gaskets, etc.. that will be helpful to have? In particular the bolts and springs that attach the a-pipe to the cat are majorly corroded.

If I've missed a parts listing resource, forgive me and just point me in the right direction. Any gems for Acura parts would also be appreciated.

thanks a bunch,
Scott

1987 Buick Grand National :naughty:
11.76 @ 116

 

Pretty please!

Someone must have a shop manual or a buddy in the parts department; the parts dept at my local dealer isn't interested in finding these parts for me.

If you don't have the part #s handy, does anyone have a better source to call?


thanks,
Scott

 

I'm interested in the same thing, I've suddenly aquired the same annoying buzz.

 

Two metal O-rings between the manifold & the A-pipe. One donut gasket between the A-pipe & the cat. I got stuff like that from A&H just by calling & describing what I needed.

At the cat I've used hardware store stainless bolts, fender washers & re-used the springs.

Let us know how the welding works. When mine started buzzing, I used the excuse to buy a header. After putting that in, it looked like I could have got the A-pipe fixed by tacking the inner & outer tubes together at the outlet. Don't seal-weld it all the way around, because the space between the tubes needs a vent.

 

Thanks for the suggestions! If others are looking for more information on the buzz the following is a very good post on the topic:

http://www.honda-acura.net/forums/sh...ferrerid=17669


The Integra is our daily driver (wife will tolerate only 1 racecar!) so I don't know many Honda/Acura vendors; A&H looks promising and are fairly close to me.

I have a welder so will give this a shot before buying an aftermarket header (money saved for the Buick...).

Any other opinions feel free to chime in.

thanks,
Scott

 

I'm going the route of welding the inner and outer tubes together as well as the first attempt to stop the awful noise.

We just welded hairline cracks in my friends 87 GN exhaust manifolds so this should be fairly painless (knock on wood)

 

Been there! The driver's side manifold does tend to crack; the stock manifold is nasty in that regard. A lot of folks also complain about the quality of the welds in the ATR stock replacement manifolds as well.

Scott

 

Yeah, the drivers side was done by the previous owner but the weld was horrible and didn't hold so we ended up doing both manifolds. Now all he needs is a new alternator (trying to fix the stockone turned out not so good) and it will be back in business. Either way it was a good experience for getting ready to weld my Integra exhaust now.

 

There are 2 gaskets at the top of the A-pipe; Walker part number 31332 (need 2). NOTE: these were listed in the Walker catalogue as correct for my 1995 Integra GSR 3-door, but were slightly too large. I do not suggest using Walker gaskets without comparing them to a stock gasket

There is one gasket at the A-pipe to cat connection; Walker part number 31357.

Bolts at cat should be part number 35129.

 

Just posting a follow-up with my results:

I removed the A-pipe and upon inspection noticed that the inner pipe at the end that connects to the cat was out of center and very close to the outer pipe. It was easy to push it with my finger and make it touch the outer pipe-- exhaust gasses no doubt did the same thing and caused the buzzing.

Note that I could not --see-- any evidence of broken welds. That said, I centered the pipe with a shim and welded the inner pipe to the outer pipe in two places. Removed the shim and it was nicely centered with the 2 small welds not making much of an obstruction for exiting exhaust.

Bolted it back up and the buzz is gone. This was a nice cheap and easy alternative to buying a new a-pipe for my daily driver.

For non do-it-yourself folks, this could be done very quickly at an exhaust shop. I'd just go in sometime when they weren't busy and ask them to remove the a-pipe. You can then point out to them what needs to be welded up. Shop time would probably be about 30 min start to finish.

Hope this helps someone!

Scott