Good find. Swapping a 83 motor into my 85 3000sd and I belive troubles ahead!

The engine should not have anything to do with it.
Swap the adapter plate off the 85 engine, and bolt it
onto the 83 engine. Then plug in the sensor wire to
the adapter plate.

Iam assuming the SD is the same as the 85 300D, as
far as I know it is the same.


Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Having read this entire thread, I still have a question. (My tach has stopped working, after working intermittently for a year or so.)

A: First post said to splice white (20) to grn/blk (25). (and plug back in??)

B: Later post says to jumper 20&25 as well as 16 &14 (and presumably tape up and leave unplugged)

I have no EGR, A/C doesn't work, 85 Turbo. What is the difference and which is preferable.

Or could this be OVP or it's fuse? I read that fuse is up under passenger dash. Is there a relay there as well. If I jumper the wire to tach, are the fuse and OVP required? (I obviously need to read up on this stuff )

__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5

I did like post 21 by funola. I removed the EGR Box since all the vac parts were suspect and thus removed. My problem was the OVP Relay (not it's fuse atop), which is only used for the EGR Box. Those are expensive to replace, so I just tossed it and the box. For those readers jumping in here, if your tach stops working in a 1985, you will lose AC since the Klima relay requires that signal. It routes thru the EGR Box. I think 1984 is the same re fixing the dash tach, though doesn't have Klima for AC.

__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

Not sure what pin 18 to the “trimmer plug” does. From the two wiring diagrams one lead from the rpm sensor goes to 16 which should logically connect to something…otherwise you have effectively disconnected your magnetic pickup. Doesn’t make sense, but hey if it works on your car, go for it.

The above photos sure look like 14-18.

__________________
79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

That is exactly what I was saying.

The pictures don't match the text of the posts and are likely wrong.

20-25 and 14-16 is what I used. And this worked.

Graham

__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5