cat flange
#1
cat flange
I found a hole where the last catalytic converter meets the two header pipes. the flange thre. the bolts are rusted off so its going to involve cutting.
what are some options. the exhaust place down the street says maybe 80 to 100 bucks to put in the gasket and could increase with how much of a pain itll be.
are there any do it yourself ideas you guys have?
what are some options. the exhaust place down the street says maybe 80 to 100 bucks to put in the gasket and could increase with how much of a pain itll be.
are there any do it yourself ideas you guys have?
#3
#4
If it's the flange gasket leaking , cut the bolts,replace the gasket , and use grade 2 bolts and nuts.
For washers,lock washers will work only short term.Due to hot cold cycles they will lose their tension.
Use flat washers then stake the bolts and nuts together.
For those that don't know, to stake them means to take a center punch and hammer a divot where the nut and bolt meet in the thread of the bolt.
Using grade 2 hardware will make life easier if/when any exhaust work has to be done in the future.
For washers,lock washers will work only short term.Due to hot cold cycles they will lose their tension.
Use flat washers then stake the bolts and nuts together.
For those that don't know, to stake them means to take a center punch and hammer a divot where the nut and bolt meet in the thread of the bolt.
Using grade 2 hardware will make life easier if/when any exhaust work has to be done in the future.
#7
Post a pic of what you're dealing with then I/we can guide you better.
Edit
You read my mind and posted the same time.
Grind the heads off and punch them out with a hammer and round punch.
DO NOT use a sawzall to cut the bolt between the flanges.
Edit
You read my mind and posted the same time.
Grind the heads off and punch them out with a hammer and round punch.
DO NOT use a sawzall to cut the bolt between the flanges.
Last edited by OTRtech; 12-26-2011 at 10:31 AM.
#8
flange
If it's the flange that has 3 bolts/studs you are having a problem with, I had the same problem... I cross-threaded 2 of those 3 studs. They are studs very similar to the ones on your hubs. I took the section out that had the flange and studs, heated the flange with a torch & took a BFH to the end of the stud you put the nut on. They popped out very easily, and then there were just three holes. I couldn't find replacement studs (exhaust shop was closed,) so I just used some bolts. You can even use some longer ones which makes mating the two flanges a lot easier.
#9
#10
studs
The studs have little splines and are pressed into the holes in that flange. Some heat and a BFH and they will come out. I can see if I still have them laying on my bench so you can see what they are... Grinding of the heads will work to if you can't get that part of the exhaust off of the truck to work on.
#11
#16
...
I heated the flange around the stud up with an oxyacetylene torch and then hit the end where the nut goes on with a hammer. They came out pretty easy that way... That's probably what the exhaust shop would do.
^ What OTRtech said will work to. I just already had the pipe out of the truck.
^ What OTRtech said will work to. I just already had the pipe out of the truck.
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TheStig88
OLD - Interior, Exterior, Electrical, & Misc.
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05-12-2009 06:31 PM