1987 4Runner Exhaust Pipe Material???
#1
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1987 4Runner Exhaust Pipe Material???
I have a 1987 4Runner 22re with a crack between the manifold/collector and catalytic converter. I would like to just remove the whole exhaust and straight pipe 2.25" to the muffler, seeing as though I only have the one O2 sensor on the manifold. The local muffler shop said that the material from my manifold to the catalytic converter was stainless steel on my truck and he couldnt weld it. I was wondering if anyone knows for sure what it is?
Last edited by TJ96TLC; 02-04-2011 at 07:53 AM.
#2
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since when can you not weld stainless steel? Looks like that guy needs to go back to welding school to both learn how to weld and to identify stainless steel because unless your exhaust was changed before, that pipe it NOT SS. Look for yourself, if it's rusted then it's not SS.
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My thoughts exactly, I think i should be looking for a new muffler shop. Any thoughts on what this will do to performance when I remove the cat and take it 2.25" to the muffler and then 2.5" on out.
#5
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2.5 is kinda big for the 4cyl's, I run 2.25" straight from my header into a muffler and then 2.25" the rest of the way. No cat. Depending on how much your cat is plugged up, you might actually see an improvement low and high end. Otherwise you might see a slight decrease in low end but a better mid-top end.
#7
Magnet test. Find a new exhaust shop.
You can weld stainless exhaust tubing with regular old MIG welder with carbon steel wire in it. Done it dozens of times.
:wabbit2:
You can weld stainless exhaust tubing with regular old MIG welder with carbon steel wire in it. Done it dozens of times.
:wabbit2:
Last edited by waskillywabbit; 02-04-2011 at 10:35 AM.
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#10
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haha yup, you could, but lets put this into perspective here. I have absolutely no clue how to weld. But I know stainless steel can be welded. Might have to be tig'd, mig'd, sticked I have no clue, but I know it can be welded just like aluminum can be. Now maybe the guy meant he doesn't have the tools there to weld it, but that's not what is sounds like he said to you. So take what he said for what it's worth.
#12
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It probably doesn't matter with an exhaust pipe but I was taught to back shield when welding SS to prevent a crystallization which weakens the metal. Probably something to worry about if you are welding the SS cooling pipes for a nuclear power plant but maybe not your Toyota exhaust .
I quote from this link: http://www.weldingtipsandtricks.com/...ess-steel.html
So to properly TIG weld SS you need to have 2 bottles of argon and some kind of jig to back shield the weld.
I quote from this link: http://www.weldingtipsandtricks.com/...ess-steel.html
One thing I have to mention about welding stainless steel is that the back side of the weld needs argon shielding just as much as the front
Last edited by mt_goat; 02-04-2011 at 11:48 AM.
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