Tri-y's for my 420SEL

1979-1991 280SE, 300SE, 300SEL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SEL, 560SEC
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420.SELect
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Tri-y's for my 420SEL

Post by 420.SELect » Fri 16 Feb, 2018 5:48 pm

Hi all,

I have very luckily found a pair of RHD tri-y's and would just like to get confirmation from the group that these are indeed the real deal.
I did obviously go through a number of posts from multiple forums to compare and they do look the goods but I would like to get your opinions before I dump 700+ on them.

Thanks!

Chris
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1988 420SEL - Agnes

hents99
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Re: Tri-y's for my 420SEL

Post by hents99 » Sat 17 Feb, 2018 12:00 am

Check part numbers...I believe they are for M117.
M116 and M117 ports are different.
560SEC, C55, W201 (2.3-16T + 2.5-16)

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420.SELect
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Re: Tri-y's for my 420SEL

Post by 420.SELect » Sat 17 Feb, 2018 6:26 am

Thanks for your reply, Hents.

After I did not receive any replies - especially given the subject of tri-ys - I started doing a bit more research. This led me to believe that tri-ys were only on euro 560s and that the manifolds are not interchangeable. Devostated!

I was so excited to find tri-ys that It didn’t even register that all the stuff I have read has been for 560SEC/SELs.
Guess I just have be thankful that I have found a well maintained W126 and stop trying to make it something it’s not.

Sorry for wasting your time.
1988 420SEL - Agnes

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420.SELect
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Re: Tri-y's for my 420SEL

Post by 420.SELect » Sat 17 Feb, 2018 6:57 am

If anybody is keen to have a look, I have put the link below.

https://www.gumtree.com.au/s-ad/bowral/ ... 1156684086

Hopefully a fellow Ozbenzer can make good use of them!

Chris
1988 420SEL - Agnes

CraigB
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Re: Tri-y's for my 420SEL

Post by CraigB » Sat 17 Feb, 2018 7:23 pm

Just for the record - what is the difference between m116 and M117 manifolds? if bolt pattern the same can ports be modified to fit?
Craig Baulderstone
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Re: Tri-y's for my 420SEL

Post by T-Modell » Sat 17 Feb, 2018 8:04 pm

CraigB wrote:
Sat 17 Feb, 2018 7:23 pm
Just for the record - what is the difference between m116 and M117 manifolds? if bolt pattern the same can ports be modified to fit?
Hi,
afaik the bolt pattern is identical. When I did the manifolds for my M117, the reference block was a M116. Block measurements were different, but the "exits" were the same.

Regards
Thomas
---------------------------------------------------------------
1967 W111 250SE Cabriolet, horizon blue
1973 W115 220D 5.0 Pick-Up Argentina, work in progress 2017/18/19
1986 R107 500SL, arctic white, the midlife crisis viagra replacement
2007 R171 SLK350, calcit white
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hents99
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Re: Tri-y's for my 420SEL

Post by hents99 » Sun 18 Feb, 2018 8:22 pm

M116 and M117 manifolds bolt pattern is same and you can swap them.
I found some pics of drawings...

M116 flange (port and bolt holes has same centerline)
Image

M117 flange
Image
560SEC, C55, W201 (2.3-16T + 2.5-16)

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420.SELect
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Re: Tri-y's for my 420SEL

Post by 420.SELect » Sun 18 Feb, 2018 8:39 pm

So you’re saying that I am able to put these on the 420?
1988 420SEL - Agnes

hents99
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Re: Tri-y's for my 420SEL

Post by hents99 » Mon 19 Feb, 2018 9:11 am

Yes. But ports are not aligned. Difference is about 3-4 millimeters...I must check cad drawings.
Little bit port matching and should be OK.
560SEC, C55, W201 (2.3-16T + 2.5-16)

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420.SELect
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Re: Tri-y's for my 420SEL

Post by 420.SELect » Mon 19 Feb, 2018 3:30 pm

Thanks for the update, Hents.

The guy I bought them off did an engine swap, 500SEL into a 380SL, and reckons that the lengths of the cylinder heads and stud configuration is identical; as he used the M116 manifolds on the M117 without any issue.

Not sure why, I surely wouldn't, but that is what he said.

I don't really feel like performing any port matching.

Chris
1988 420SEL - Agnes

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Re: Tri-y's for my 420SEL

Post by CraigB » Mon 19 Feb, 2018 4:01 pm

In the smaller W107 sl engine area not enough room for the tri-ys - that's why he used them. Port matching you can put your gasket over the manifold lined up as a guide. You would think the manifolds would be bigger diameter if anything though - may not need much.
Craig Baulderstone
Lurch
280s's
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280SL
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420.SELect
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Re: Tri-y's for my 420SEL

Post by 420.SELect » Mon 19 Feb, 2018 5:42 pm

Ahhh, that seems logical.

Yeah, I would assume the same. Not nearly as detrimental if the manifold is larger; just way more of a pain to port the heads than the manifold.

Chris
1988 420SEL - Agnes

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