280s exhaust manifold

1965 - 1972: 250S, 250SE, 300SEb, 280S, 280SE, 280SEL, 280SE 3.5, 280SEL 3.5, 280SE 4.5, 280SEL 4.5, 300SEL, 300SEL 6.3, 300SEL 3.5, 300SEL 4.5
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JakeH
B Class
Posts: 15
Joined: Sun 13 Mar, 2016 1:33 pm
Model you own: w108

280s exhaust manifold

Post by JakeH » Fri 28 Apr, 2017 3:18 pm

In need of a new exhaust manifold for my 70 280s, anyone have one I can purchase? Thanks


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CraigB
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Posts: 5006
Joined: Thu 23 Jun, 2005 1:18 pm
Model you own: I own multiple different models
Location: Hawthorndene (Adelaide)

Re: 280s exhaust manifold

Post by CraigB » Fri 28 Apr, 2017 6:04 pm

Where are you? You can instantly see from my signature I'm in Adelaide. I have a number of spare manifolds but most important would be checking if those heated flaps are working correctly or maybe you can swap in from yours? What's wrong with yours?
Craig Baulderstone
Lurch
280s's
280SE3.5
280SL
350SL
500SEC's
560SEL's

JakeH
B Class
Posts: 15
Joined: Sun 13 Mar, 2016 1:33 pm
Model you own: w108

Re: 280s exhaust manifold

Post by JakeH » Fri 28 Apr, 2017 6:07 pm

Mines cracked mate. On the flange
Image


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JakeH
B Class
Posts: 15
Joined: Sun 13 Mar, 2016 1:33 pm
Model you own: w108

Re: 280s exhaust manifold

Post by JakeH » Fri 28 Apr, 2017 6:08 pm

In vic


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CraigB
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Posts: 5006
Joined: Thu 23 Jun, 2005 1:18 pm
Model you own: I own multiple different models
Location: Hawthorndene (Adelaide)

Re: 280s exhaust manifold

Post by CraigB » Fri 28 Apr, 2017 6:17 pm

That doesn't look good. I definitely have spares. If you were local i would say come around and choose etc. Its really just the time to pull apart or maybe its easier to send the whole think including inlet for you to play with, but then postage is a factor. If you want to leave it a day or so and see if you have any just around the corner and then i will have a look - need to go to my parts shed at a different location to home.
Craig Baulderstone
Lurch
280s's
280SE3.5
280SL
350SL
500SEC's
560SEL's

JakeH
B Class
Posts: 15
Joined: Sun 13 Mar, 2016 1:33 pm
Model you own: w108

Re: 280s exhaust manifold

Post by JakeH » Fri 28 Apr, 2017 6:21 pm

I will try around here first and if no luck send you a message. How do the heated flaps work?


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CraigB
OZBENZ Admin
Posts: 5006
Joined: Thu 23 Jun, 2005 1:18 pm
Model you own: I own multiple different models
Location: Hawthorndene (Adelaide)

Re: 280s exhaust manifold

Post by CraigB » Fri 28 Apr, 2017 6:38 pm

They have like a weight and circular spring (bi-metallic i guess) you can see on the outside of the manifold and a flap inside that starts off by letting the exhaust gas get up to the inlet manifold to warm it up quicker and then close off as it warms up. They are often seized up and i guess that is most likely in the open position, with the impact on performance that we all know about cold air intake meaning more gas/ denser air going in to go bang and better performance. In our warm climate i imagine if they give grief jamming them closed somehow would be a fair option.
Craig Baulderstone
Lurch
280s's
280SE3.5
280SL
350SL
500SEC's
560SEL's

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Bartman4800
300 SLR
Posts: 1937
Joined: Fri 10 Oct, 2008 12:10 am
Model you own: w111
Location: Perth WA

Re: 280s exhaust manifold

Post by Bartman4800 » Fri 28 Apr, 2017 7:11 pm

It's really a pig of a job to get the exhaust connectors out of the manifold.

Start soaking them with your best penetrating oil. Make sure you order some new gaskets (MBspares will have them)
I spent more than a week every night squirting banging and heating.

In the end I cut one of the pipe, then they came off...

And ow, it's also a bit of a job to line up intake and exhaust manifold, after you replaced one. They are bolted together where the exhaust heats the intake.
If Craig has one, it's easier to replace both at once, if they have not been parted before...

Funnily enough, my Australian delivered finny does not have the counterweights...


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

CraigB
OZBENZ Admin
Posts: 5006
Joined: Thu 23 Jun, 2005 1:18 pm
Model you own: I own multiple different models
Location: Hawthorndene (Adelaide)

Re: 280s exhaust manifold

Post by CraigB » Fri 28 Apr, 2017 7:26 pm

That's interesting about the Oz finnie - maybe they worked out our climate didn't need it and just keep the air away from getting to the inlet.

Yes i was thinking a bit of extra freight could save hours of work! See how you go with a local source first.
Craig Baulderstone
Lurch
280s's
280SE3.5
280SL
350SL
500SEC's
560SEL's

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