rb presilencer fix
#1
all aboard!
Thread Starter
rb presilencer fix
I just got a rb full single exhaust from a friend and i went to put it on yesterday but the threads on the header end of the presilncer were messed up - long story short: one of the studs snaped off. Does anyone know about the construction of these things, cause they aren't screw-in studs so I figure they are just bolts welded on the inside. Im not sure what i could do to fix it, any suggestions?
Cody
Cody
#3
EliteHardcoreCannuckSquad
Join Date: Jul 2001
Location: London, England/Sesimbra, Portugal
Posts: 3,178
Likes: 0
Received 0 Likes
on
0 Posts
I've seen this problem many times before. The threads on Racingbeats single presilencer (from the short primary system) tend to disintegrate after a few years. To fix it, cut what's left of the stud off, then grind it down flat. Next drill out a new hole where the stud used to be, and weld a new one on. If you keep your welding to a minimum, the header bracket holes will be just large enough to fit over the welds.
Its not the easiest fix in the world, but it beats buying a new presilencer!
Its not the easiest fix in the world, but it beats buying a new presilencer!
#4
Senior Member
iTrader: (3)
Join Date: Mar 2001
Location: San Francisco, California
Posts: 266
Likes: 0
Received 2 Likes
on
2 Posts
This also just happened to me. I was changing my clutch and took the Racing beat pre-silencer down and one of the studs snapped. Problem is they are welded in so I couldnt get it out easily. I was gonna drill it out and tap it, but I think they are hardened studs and the tap might break. I just left it for now and will probably weld the silencer and header together for no exhaust leak.
-jrx13
-jrx13
#5
Senior Member
iTrader: (6)
I cut off what was left of the rusted, stripped, mangled studs on my presilencer and welded on a small pipe "extension" to that end with a matching flange on the end, then bolted that flange up to the header with the standard header gasket. No leaks, issues, etc. in 3-4 years.
Trending Topics
#8
Lapping = Fapping
iTrader: (13)
There is a better way. Open presilencer surgery. Cut open the shell so you gain access to the back side of the stud. Then cut down through the 3/8" plate to get rid of the stud remnant. Then set a new bolt of the same length and thread pitch in place and weld it in. Add the small piece of steel you cut out of the 3/8" plate and weld it back in. Reinstall the section of shell you removed. Once it is all welded, grind any lumpy areas smooth on the flange surface so it seals again.
This is the way I fixed a broken presilecer stud and it worked out great.
This is the way I fixed a broken presilecer stud and it worked out great.
Thread
Thread Starter
Forum
Replies
Last Post