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How Do You Separate These Two Exhaust Pipes???
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Posted 10/10/2010 7:40 PM
G-AMG
G-Class DIY Host




Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
500
How Do You Separate These Two Exhaust Pipes???

Sorry for the stupid question,

But, does anyone have any experience in SEPARATING these two exhaust components??

It is the "Down Pipe" which goes from the Exhaust Manifold, downward to the level of the frame, where it connects to the "main" exhaust line running aft towards the muffler.

I've soaked the coupling in top-notch penetrants (red Corrosion X, and Micromist) for SEVERAL DAYS now, and have two Pipe Wrenches on each male and female... but this thing is not budging...

Do I need to HEAT it?, Bang on it? Use my teeth? What?

Since this is the ONLY "Downpipe" which needs changing (the original photos I posted gave a FALSE impression of a bad "aft" manifold-to-downpipe connection, I was hoping to just REMOVE it, rather than CUT it off, and have to weld it later. Plug and Play is better for me..

I would appreciate ANY direction..

G



(Exhaust.JPG)



(Exhaust 1.JPG)



Attachments
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Attachments Exhaust.JPG (112KB - 5 downloads)
Attachments Exhaust 1.JPG (108KB - 6 downloads)
#178570
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Author
Posted 10/10/2010 10:41 PM
hipine



Date registered: Jul 2006
Location: US, CO, Bailey
Vehicle(s): 460 1980 280GE w. 617A
5000
RE: How Do You Separate These Two Exhaust Pipes???

Yours are obviously not factory. From the factory they didn't separate at that location. As you can see in the EPC, this was a "Y" pipe with the top of the Y connected to both manifolds and the bottom of the Y connected to a flange ahead of the t-case (late trucks had a little transverse mounted resonator there, early ones only a pipe back to the main muffler) Each upper leg of the Y had a flex portion just aft of the manifold.

Do what ya gotta to get it out and scrap it.

-Dave G.
#178576 - in reply to #178570
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Author
Posted 10/10/2010 11:18 PM
G-AMG
G-Class DIY Host




Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
500
RE: How Do You Separate These Two Exhaust Pipes???

Dave,

I guess I was confusiated looking at EPC, where #8 looks "similar" to my set-up.... which also looks "Male" on the lower end, like mine.

At this point, I've lost all delusional ideas that ANYTHING on my truck is "OEM"... Ha Ha!



(Exhaust.JPG)



Attachments
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Attachments Exhaust.JPG (70KB - 6 downloads)
#178577 - in reply to #178570
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Posted 10/10/2010 11:25 PM
elevatorbernie
Expert




Date registered: Aug 2006
Location: Vancouver B.C. Canada
Vehicle(s): 1989 280GE
Posts: 1329
1000
RE: How Do You Separate These Two Exhaust Pipes???

I'll second that...cut it off and scrap it. Then get one of these stainless steel works of art from Eurotruck, it has flex pipes like the stock MB down pipe, but without the 90 degree bend after the collector. I haven't installed mine yet...it's on next year's to do list.

Edited by elevatorbernie 10/10/2010 11:46 PM




(exhaust pipe 003 (Small).jpg)



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Attachments exhaust pipe 003 (Small).jpg (60KB - 5 downloads)
#178578 - in reply to #178570
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Author
Posted 10/11/2010 12:34 AM
G-AMG
G-Class DIY Host




Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
500
RE: How Do You Separate These Two Exhaust Pipes???

Ok, Ok... message received loud and clear... I'll cut and weld..

Like Hipine says, "Ahhh, another 'OPPORTUNITY'!"
#178580 - in reply to #178570
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Posted 10/11/2010 11:14 AM
hipine



Date registered: Jul 2006
Location: US, CO, Bailey
Vehicle(s): 460 1980 280GE w. 617A
5000
RE: How Do You Separate These Two Exhaust Pipes???

Whoa, my bad, Patrick. From that picture anyway, it looks like some did come in two pieces there. Those pipes look strange where they connect to the manifolds though, almost non-G-ish. Clicking on the # 8 and # 10 parts with your VIN filters active would confirm it though. It's also really strange to me that there's no flex piece in there between the manifolds and the first resonator. That bracket #387 will fix the resonator solid to the chassis and you definitely don't want the motor rocking against that, even with spring-loaded bolts..

I'm afraid the advice remains the same though. I don't see any chance of separating those two while the assembly is in the truck. EB's advice is good. Junk what you have, forget the front resonator, and go with a nice "Y" pipe with flex portions in it. You might have to drop the front prop shaft to get the old stuff out.

Good luck!

-Dave G.
#178587 - in reply to #178577
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Posted 10/11/2010 1:48 PM
J.R.
Elite Veteran




Date registered: Apr 2006
Location: Southern Maryland
Vehicle(s): 00 G500,05 Taco,09 Porsche 911 4S,86 280GE (sold)
Posts: 609
500
RE: How Do You Separate These Two Exhaust Pipes???

As you plow through this one, I recommend that you take a look at the proximity of the exhaust pipe to the transmission and transfer case. It's been a while since I've been under a 280, but I recall making sure there was adequate heat shielding and I even added some header wrap to keep as much radiant heat off the transmission, etc. It was a lot easier when I was doing the R&R of the entire exhaust system. I wrapped the entire exhaust pipe from the manifold to the first muffler. There has been some discussion of header wrap in the past and the conclusion is - to each his own.
#178591 - in reply to #178580
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