Cracked Exhaust Manifold [Archive] - GrandAmGT.com Forum

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B0000rt
01-21-2007, 04:03 PM
My 3100 has a cracked exhaust manifold on the front manifold.

Does it matter if it stays this way? I see no problem, other than exhaust fumes, not properly being put through the cat...

I've heard of people trying to diy with this (when putting on headers), should I go ahead with it? I've done the LIM gasket change myself, and the engine's been running for about 10,000kms so far with no other problems...

notsoaveragej0e
01-21-2007, 05:11 PM
http://jbweld.net/products/jbweld.php

Panacea
01-21-2007, 06:45 PM
http://jbweld.net/products/jbweld.php


"Not recommended for use on manifolds, exhaust systems, and other engine components which normally operate at temperatures above 500 F"

drumking1721
01-21-2007, 07:24 PM
Autozone sells some stuff in the adhesive isle

notsoaveragej0e
01-21-2007, 07:26 PM
"Not recommended for use on manifolds, exhaust systems, and other engine components which normally operate at temperatures above 500 F"

Pfft, you're just splitting hairs now...

Sprucegagt
01-21-2007, 10:12 PM
My 3100 has a cracked exhaust manifold on the front manifold.

Does it matter if it stays this way? I see no problem, other than exhaust fumes, not properly being put through the cat...

I've heard of people trying to diy with this (when putting on headers), should I go ahead with it? I've done the LIM gasket change myself, and the engine's been running for about 10,000kms so far with no other problems...

If you leave it alone you may get exhaust fumes inside the car. Also depending on how bad it is, it will make your gas mileage worse and/or cause a loss of power.

coupe
01-22-2007, 05:45 AM
Just replace the manifold, its not hard

B0000rt
01-22-2007, 06:09 AM
Just replace the manifold, its not hard

Everyone talks of broken studs, so I'm just worried about that.

I used something like that JB weld stuff, when patching up my muffler :D

williamGT
01-22-2007, 12:40 PM
time for headers. LOL

B0000rt
01-22-2007, 01:16 PM
time for headers. LOL

Heh, no way. I'm not putting anymore money than I need to into this FWD non-LSD 4Speed Auto, car!

It's a $95 part on Rockauto.com anywhere that has it for cheaper? :D
Edit: Jesus, nevermind, shipping alone is $43 :( Damn heavy bugger!

I'm sure I can find a better epoxy compound that will withstand higher temps, but i'd have to clamp that stuff on the outside eh?

coupe
01-22-2007, 02:35 PM
See if you can find one from a junkyard.

B0000rt
01-22-2007, 03:21 PM
See if you can find one from a junkyard.

Found a local yard that has their DB online.

$88 CAD apparently

I'm probably just gonna go with some sort of epoxy putty + high temp sheet metal + clamp, aka ghetto styles :D

coupe
01-22-2007, 03:28 PM
Well at least shop around man, there has gotta be more than 1 junkyard within a reasonable distance from your home.

tenspeed
01-22-2007, 03:43 PM
I'm sure I can find a better epoxy compound that will withstand higher temps, but i'd have to clamp that stuff on the outside eh?

If there is room, put a large hose clamp over the repair.

You can check ebay and/or put a ad in the stuff wanted section. People with headers may have one in the garage.

jackal2000
01-22-2007, 03:49 PM
If there is room, put a large hose clamp over the repair.

You can check ebay and/or put a ad in the stuff wanted section. People with headers may have one in the garage.

i have 3400 exhaust manifolds if your interested.

notsoaveragej0e
01-22-2007, 04:17 PM
Why can't you just take it to a shop and have then run a weld the whole way down the crack?

B0000rt
02-09-2007, 06:04 PM
Why can't you just take it to a shop and have then run a weld the whole way down the crack?

People say it's hard to weld it or something.

Anyways, found a product that I'm gonna test out:
http://www.permatex.com/products/automotive/specialized_maintenance_repair/exhaust_system_maintenance_repair/Permatex_Hi-Temp_Metal_Repair_Compound.htm

brim
02-10-2007, 09:16 AM
other issue you'll probably run into is the o2 sensors can get tripped because the of leak.