Now that I've lured you in... I pulled the engine out of my 79 240D and plan to pull the 617 out of my 83 to replace it. The glow plug system is completely different ( as well as a few other things). My question, based on the photos is this. Can I just connect the glow plug wire in the 79 to the relay in the 83? I'm assuming that would be just too good to be true.

Thanks in advance for feedback.

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Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

No you can not just hook the old wire to the newer relay. The old plugs from you 79 are wired in series, while the newer ones in the 83 are in parallel. The old plugs also don't actually use 12v. Then each get something less than 12. If you give them 12v you'll fry them. The best way to deal with this would be to get the newer pencil style plugs and put them into your 79 engine. The older series plugs have a bigger body, so you have to get the large bodied pencil style plugs. Then you can use your harness from the 83 sans one wire, and wire the GP up just like they were in the 83.

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I'm not going to use the 79 engine. I'm putting my 83 (617) engine in the 79 240 chassis. So, you're saying I need to pull the GP wiring from the 83? Other than this relay, is there other components in the 83 I'd need to transfer over to the 79?

thanks

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Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

basically yes. you can. but you don't have to.
the harness for the new plugs will connect to a bolt on the firewall, and you're golden. assuming your 79 relay worked.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

So, you're saying the easiest way to go is to install old style glow plugs into my 617 engine so that I can just use the existing system that's in the 79?
There's 10 wires coming and going from the 83 relay, and only one on the 79 (seems nice and simple to me), what will I be eliminating by going to the system in the 79.

__________________
Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

No you can not put the 79 plugs into the 83. What you should be able to do is use the 83's plugs but the old wire off the firewall in the 79, wire it to the #5 GP, then put jumper wires to each of the following GPs, and don't ground the last plug like it is on the 79.
Firewall Strip Fues<---->5<--->4<--->3<--->2<--->1

Do a search for Loop to Pencil glow plugs conversions, and look at how folks have them wired, That is basically what you are doing.

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simple thing to do is leave the harness on the 83 GP's and clip the socket off the end, then attach it to the fuse connection on the firewall of the 79. however, if you do that, and your relay is bad, you will need to put the socket back on the end and get the new relay wired in.
so, I'd just remove the wiring from the 79 relay, attach the control wires to the new relay from the 83, and connect everything as if it's an 83.
but just running a wire from the firewall, and jumpering all the 83 GP's together will work IF your existing relay is good.
it will put out 12V to the plugs, but it's fused at 50 apms, so change the fuse to an 80 amp strip!
check this page!
http://dieselgiant.com/mercedesdieselloopglowplugrepair.htm

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

This looks pretty straight forward for an electrical dummy. Thanks guys this is very helpful.

I have one other question. These two vacuum lines (photo below), one is to the EGR (which I intend to look up info to eliminate), the other goes to the turbo and both go to the switch on the fender well. Do I need to transfer these over with the engine, or can I eliminate both?

Attached Thumbnails

   

__________________
Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

are you sure the motor came from an 83? that looks like an ARV from an 85 motor. not sure what the switch on the firewall is... sorry.

ARV?
This engine could be anything. It was pulled out of something in the PNP and put in the 83 240d chassis a few years ago. I was told it was an 83, I think. For some reason I was thinking it was out of a 300SD. I'll go out and see if I can find a date on it, or see the ID#

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Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

Has 84 on the front of the head.
Also, the plate on the back of the oil filter housing where the oil pressure line plugs in on 617 engines, at least the ones I'm familiar with, is different on this engine, there is no plug. I remember looking it up and finding the SD had an electric sending unit rather than a mechanical. So, it could be an 84 out of an SD.?

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Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

The switch that your vac lines go to are the overboost protection solenoid(or something like that). You don't need it since you don't have turbo.

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The engine I am going to use is a turbo. It's going into the 240D chassis. I noticed the vacuum line from the solenoid runs back to the firewall and is not connected to anything. I guess that means I don't need it, since I've been driving it for years that way.

__________________
Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

You can eliminate the vacuum lines just plug up the dead vacuum lines. The switchover valve in you pic is for ARV and EGR functions in a 1984 California model. It too can be eliminated also.

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1983 123.133 California
- GreaseCar Veg System

Thanks!

__________________
Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/