Mercedes Diesel Discovery 1 Build

#1
I'm nearing completion on my dream diesel build, ending a nearly 15yr battle against time, finances, willpower, ect to finish.

The truck started as a super clean 50th anniversary LSE, which I pulled the 4.0 out of, (still not sure what to do with it, maybe an MGB GT?)

The donor engine came from a 1986 300SDL, (om603). For those not familiar, this is the rarer 6cyl, SOHC turbo not the 5. Engine only needed a custom oil pan for land rover duty. It now has 2 sumps and a lengthened pickup tube to draw from the baffled rear sump. I also made an intake to add an intercooler. Injection pump has been set to "full load" setting and turbo wastegate adjusted to build 15psi

The chassis modifications include: modified crossmember to clear the L6. Hood scoop for the intercooler
FJ80 cruiser lift coils
Terrafirma long travel shocks
Cut and shortened shock towers
Custom built rocksliders, rear bumper, and front diff guard.
Snorkel
ARB front bumper with warn m8000 winch
Dual batteries
Mercedes fuel fill neck (diesel pump nozzles are larger)
C.b. radio
Poly/plastic pallet for a roof basket

The engine adapter plate was made by SMT (Scandinavian Marine Technologies) by Gosta Lindgren, top quality parts, but none fit, (made for range rover HP24?) So I had to have a local machinist make my parts to my measurements.

After much stress and headache I am nearing the end of the road, last upgrade will be a steel roof rack system, possibly a tent, with the end goal being a vehicle to travel the Pacific northwest with my family.


Sent from my SM-G960U using Tapatalk
 
#2
Congrats on finishing the build! What a project! Would love to hear how that motor performs in the D1. Maybe I missed it, but what transmission are you using?

Any way to move that intercooler up front to get some fresh, cool air? Maybe look at the 300Tdi intercooler/radiator setup as a starting point if you find you need cooler intake temperatures.

Enjoy the adventures ahead! I’ll be watching for you out and about in the PNW.
 
#3
Congrats on finishing the build! What a project! Would love to hear how that motor performs in the D1. Maybe I missed it, but what transmission are you using?

Any way to move that intercooler up front to get some fresh, cool air? Maybe look at the 300Tdi intercooler/radiator setup as a starting point if you find you need cooler intake temperatures.

Enjoy the adventures ahead! I’ll be watching for you out and about in the PNW.
I'm using the factory HP22 ZF trans. Theres no way to route piping past the radiator due to my dual battery setup, and the size of the radiator. I may use a water to air cooler in the future.

Sent from my SM-G960U using Tapatalk
 
#6
Didn’t realize you had a hood scoop for the intercooler.

Do you have a pyrometer hooked up? What EGTs are you running?
 
#7
Didn’t realize you had a hood scoop for the intercooler.

Do you have a pyrometer hooked up? What EGTs are you running?
I have one, yet to install. I figure any bit to help would be nice, had no intercooler before!

Also been looking at possibly just a small 8" fan on it, for times when I'm at low speeds where the scoop wouldn't help


Sent from my SM-G960U using Tapatalk
 
#8
Here's a startup video when I first got it running, there was no exhaust so it was exiting at the turbo. But I swear I can stand a nickel on edge on this valve cover, it's a very smooth engine


Sent from my SM-G960U using Tapatalk
 
#10
Why the cut in the firewall/vent shroud ?
The OM series engines have a filter housing for the oil filter, the element comes straight out the top, its located at the rear of the engine directly below the shroud/cowl. I now have some of that door edge molding stuff over the cut edge to make it look better

Sent from my SM-G960U using Tapatalk
 

J!m

Active member
#11
I like this swap! This engine in thus truck must be a freight train!

But, as you probably already know, a scoop that low/close to the body will not get much "forced induction". It would need to be raised off the body an inch or two to be in "clean" airflow.

An alternative might be to duct air from the radiator support, under the inter cooler and exit straight up through the hood. You also gain radiative advantage as the heat naturally wants to rise.
 
Top