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#1
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Broken flex pipe...
So my 300SD flex pipe (the small pipe that goes in between the turbo and the down pipe) split at the very end (near the fire wall) so every time I accelerate it makes a horrid buzzing noise and it's starting to get annoying, I Saw a flex pipe kit at autozone and wanting to know if that kit made for replacing that flex pipe that I currently have...
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi |
#2
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exhaust is just simple plumbing. As long as you stay with your diameter, you can weld anything you like on.
For something like a flex section, you can always go softer than the original design as long as you retain the same strength, but you can not go stiffer. The flex section aids in damping all the engine vibrations that would rattle your exhaust apart (bolts, mounts etc..) while allowing some length adjustments in every direction. |
#3
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You can get something like this
and weld it in place of your accordion bellows looking flex section. threads on here report using 3" but i found that to be way too big. I butt joint welded with 2 3/4. Major pain in the butt, getting the orientation & length correct, lots of putting it in and taking it out. Mine is a cali car which i think makes it harder to fit and un-fit the down pipe. Im all for saving $$ but it may have been worth it to spend the $130.00 and avoid the hassle.
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1996 E300 110,000 1985 300TD 212,000 1980 300D 238,000 |
#4
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Mine broke a while back and I just replaced the whole pipe...way easier. Unless you have a welder....
Our Rav4 had that piece break up front....Toyota uses this odd "flexible metal" type contraption that eventually just separates from itself and falls off (it did last 12 years though....).....the shop welded in a new braided steel one like in that link....and it works great. The updated MB exhaust have the braided one too.... The guy at the exhaust shop made the comment that "morons designed this" in regards to the odd flex coupling on the Toyota.
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#5
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Mine started leaking a few months back. I bought the new pipe but haven't put it in yet. In the mean time I slipped a pieces of sheet metal w RTV sealer and hose clamps over it. It has been quiet for now. I need to fix it before next inspection.
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81 300D Turbo 190K sold 83 300sd 319K best $500 I ever spent-daily driverw/ 2 tank WVO set up |
#6
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so its 2 inches not 2 1/2... exhaust system are the easy but i am just dont have the space to work on.
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi |
#7
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Its metric and its closer to 2.5"....its ever so slightly smaller than 2.5"....to the point that a 2.5" pipe just barely slips over the stock stuff. Which is perfect.
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#8
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Is there any high force required in removing the exhaust pipe form the turbo or is there a space between the exhaust pipe and the and the turbo and the flex pipe just join's them???
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi |
#9
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there is a flange with 3 bolts running parallel to the turbo shaft that pulls the downpipe against a compression joint.
loosen them and send some light blows around the circumference of the down pipe only. It should pop right off. |
#10
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The pipe has a flared flange at the end by the turbo, it has a bracket/clamp thing on it that holds the pipe to the turbo with 3 copper nuts on the three studs coming off the turbo. Not a big deal to get off, but those nuts can be annoying. And if the pipe is stuck it might need a couple gentle whacks from a hammer to jar it loose.
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
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