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Old 02-25-2013, 09:57 PM
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Looking for help separating downpipe

OK a couple of years ago I had a local diesel shop (and I use that term loosely) install my MBRP exhaust. Nothing special just a 3 in downpipe and 4 in from down pipe out the back. Every since I had it installed I've alwasy had a vibration/knock and could never locate it. After taking the turbo and looking around I found that the shop DID NOT cut and bend the cab pinch weld. Its almost rubbed a hole in my downpipe it was so bad. Anyway here is where I am loking for help. I am trying to get the downpipe separated from the rest of the exhasut system without destroying something. I have been soaking the joint with Deep Creep and PB Blaster every day. I have banged, pried, tried to twist, and several other things but cant get it separated. Also if anyone has any pics of cutting and bending the pinch weld that would be helpful also.

Thanks

James Gaddy
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Old 02-25-2013, 11:57 PM
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If you had a u-bolt stlye clamp your going to have to cut it out.
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Old 02-26-2013, 07:01 AM
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Quote:
Originally Posted by JSchuricht View Post
If you had a u-bolt stlye clamp your going to have to cut it out.
Bingo. To get those "bear clamps" or u-bolt style clamps tight enough to seal, you have to pinch the tubes together which makes them damn near impossible to separate without cutting. If I were you, I'd just order a new down pipe and an SS band clamp so that if you ever have to pull it apart again, it will come apart easily. Plus you'll have a bit more clearance at the firewall with a band clamp.



Probably $8-10 at Napa.
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Old 02-26-2013, 07:56 AM
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My downpipe didnt have a clamp where it goes into the exhaust. I guess its just "frozen" in because its been in there for a while. If I cant get it out in a few more days I am going to get the sawzall after it and then order a new downpipe.

The thing that really makes me mad is this is just one more thing that I've paid to have done and it wasnt done right. I knew better than to let someone else do it but I didnt have time. O well lesson learned, again, dont let anyone else work on my truck.
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Old 02-26-2013, 09:03 AM
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Use a torch with a 45* braising tip to heat the outer section of pipe. This will cause the outer pipe to expand off the inner pipe. Twist and pull apart.
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Old 02-26-2013, 01:21 PM
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^^^ what he said. But if it has been pinched, u may be getting the sawzall out. BAND CLAMPS FOR THE MOTHA FU**IN WINN!
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