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1987 420 SEL
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37 Posts
Discussion Starter #1
When my 420 v8 bites the dust, I am thinking of a wild project... Ford V10 transplant! Dimensionally, it looks like it will fit. Yes, some fabrication will have to be done, but I am thinking entire power train... engine and trans, computer, in tank fuel pump, etc.

I have access to a V10 from a 3/4 ton Ford pickup and have been salivating at the possibilities. Very strong and reliable engine... this one has 183,000 miles on it and is not tired AT ALL. The low end torque is amazing! And it has long, long legs... just keeps winding up until you let off the gas.

Anyone?
 

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Premium Member
2012 CL550 4MATIC Coupe
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9,992 Posts
Sounds like an ambitious project, good luck with it. Keep us posted on your progress too.

There have been some pretty wild conversions, so I'm sure it can be done, if like you say, it will fit.

Yes, you will have to do a complete transplant as you say. And then patch into the cluster. Let me know if you need help on the electrical side of things.
 

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Registered
1997 SL500 40th Aniversary 1998 C230 2002 E430 sport 1987 420SEL sold 1989 300E sold
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573 Posts
Sounds like it will be a lot of work and time, but I think it be pretty wild to have a V10 in a 126 I`m sure some of the purists are going to give you some negative comments, but I say go for it, i would defiantly do something with the rear end though, at least go with a limited slip diff. from a 560.
 

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Registered
1985 500sel and 500sec 2012 E63 1989 Porsche 911
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5,336 Posts
ill put a ford gt blown engine in mine
 

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R.I.P. Never Forgotten
1983-2007 MB's
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8,023 Posts
The V10 is a truck motor at best. Asphyxiation at higher rpm's which will make your 126 more of a low rpm chariot riding on torque. There's a difference.
 

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'95 993 / 2011 F150 Raptor SC / Land Cruiser D4D V8 / 500 SEC
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439 Posts
The V10 is one of the modulars, isn't it ? Isn't that a cast iron block ? The weight in the 126 engine bay will really upset it.
 

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Registered
1985 300SD 1988 560SEC 822 1976 450SEL 1981 300SD
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1,075 Posts
...or a 560SEC HV motor, 300HP, 112K kilometers, complete ready to bolt in, for about half of what it will cost to launch that sad tired blue oval POS in there. Debadge that trunk lid (or find a 300SD lid in aluminium, and lose some pork),.

Better yet, get off the bong :/
 

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1990 300SE
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275 Posts
I think when it comes to these engine swaps, the scariest part is always the wiring. I'm not an electrician, and I don't know anyone that knows how to do wiring harness conversions. If you do, that will probably simplify things tenfold.
 

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1973 W107 350SL, 1985 W123 280TE, 1983 W123 230E, 1996 W202 C280
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457 Posts
I have a complete crashed v10 tdi twin turbo Vw toureg, but just because I have it doesn't mean Im going to put in one of my 126's because that would be retarded and the headache of a life time.


I think if you want power bore is to 6L and bolt on a turbo, would be cheaper and easier.

Just my 2 cents.
 

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SuperModerator
1986/1990 W126
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14,102 Posts
Thats a whole lot of torque, if you could manage getting it in. Thats weight could be an issue though. Do you know the weight?
 

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W124 400E, W126 500SE
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971 Posts
This sounds pretty crazy. You'd need to replace the whole drivetrain, manufacture transmission controls, electronics (you'll loose a lot of features as well), I guess steering gear will have to be replaced as well (it will have wildly different pressures). In the end I think it's easier to swap body panels to a Ford than to fit a Ford engine into Merc...
 

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1991 420 SEL
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145 Posts
Ditto what RubberDucky said. The Ford V10 is one of their modular engines. And they're all crap. And this from a friend of my son who is a Ford Mechanic. I can recommend the Viper engine. I'm on my second Viper and have never had an issue with the engine, or drive train. It's a beast. The rest of the car eeeeeeeehhhh. Not so much. At least you'll be shed of that Rube Goldberg clap trap fuel injection setup.
 

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2004 Acura TL, 1999 GMC Yukon
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1,658 Posts
That's a funny idea. I love my troubled car too much to add 300lbs to the nose. N2O!
 
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