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-   -   Om617 loop spiral to pencil (http://www.peachparts.com/shopforum/diesel-discussion/396192-om617-loop-spiral-pencil.html)

jsp300D 11-23-2018 01:23 AM

Om617 loop spiral to pencil
 
Hi, I want to convert loop spiral to pencils as today I want to move my 300D and had a hard start (three cycles to start).

I want to keep the time of the original relay and will use a second relay to put more amps through the plugs.

Is this diagram safe to use ?

https://imagizer.imageshack.com/v2/8...923/YdW8gl.png

sixto 11-23-2018 02:17 AM

Not possible to convert to pencil plugs and pencil relay? I think even the glow plug relay is a separate section from the main harness.

Sixto
98 E320s sedan and wagon
02 C320 wagon

Stretch 11-23-2018 02:44 AM

The point of the original Mercedes system is partly to protect the plugs - there's a chance you'll burn them out if you start using them for long than intended.

If you are having a rough time getting the engine started have a look at the condition of the engine oil (fresh oil always helps), the health of the starter (a rebuilt starter spins faster) and if necessary consider fitting a block heater.

I feel compelled to add that In most (weather) situations in the Netherlands I've never had trouble starting my OM617 (or any other vehicle)

jsp300D 11-23-2018 03:40 AM

Quote:

Originally Posted by Stretch (Post 3864199)
The point of the original Mercedes system is partly to protect the plugs - there's a chance you'll burn them out if you start using them for long than intended.

If you are having a rough time getting the engine started have a look at the condition of the engine oil (fresh oil always helps), the health of the starter (a rebuilt starter spins faster) and if necessary consider fitting a block heater.

I feel compelled to add that In most (weather) situations in the Netherlands I've never had trouble starting my OM617 (or any other vehicle)

All done except glow spirals and injectors.

NZScott 11-23-2018 05:00 AM

My '78 uses the stock setup with no problems except the glow timer doesn't shut off until you engage the starter so I wouldn't worry about an extra relay myself.

PS They're a loop not a spiral and these same questions seem to come up every couple weeks so a search would help you out :)

Mxfrank 11-23-2018 08:29 AM

I doubt the pencil relays aren’t going to draw 120a, and your relay coil isn’t going to draw 80a. You need to install an appropriate fuse on the 30/87 run for this to even be safe. It doesn’t seem that your added relay has any purpose.

vwnate1 11-23-2018 09:32 AM

Cold Weather Starting Drill
 
? When was the last time you adjusted the valves ? .

This is the # 1 cause of hard Winter starting .

jsp300D 11-23-2018 09:43 AM

Been measured (only one adjusted)

these pencils draw 15A each instead of 10A so relay cant handle it I guess.

maclaveau 11-23-2018 06:50 PM

If this is for a w115 300D the only issue I see is with the thermo time switch not being in the loop somewhere to tell you when the plugs are hot enough. It acts as the ground for the loop glow plugs in the original system.



Perhaps it could be connected to terminal 85 in your diagram? There are two connections on the switch, one for the original plugs and the other is for the gp light in the dash. I would connect the one for the plugs to 85

jsp300D 11-23-2018 11:43 PM

the original thermoswitch on the block will be used (attached to the old relay)

Mxfrank 11-24-2018 08:20 AM

Quote:

Originally Posted by jsp300D (Post 3864240)
Been measured (only one adjusted)

these pencils draw 15A each instead of 10A so relay cant handle it I guess.

So you need a 100a fusable link in place of the 150. And your 85/86 coil draws maybe 1a, so a small fuse there. Where did you find a 120a relay?

barry12345 11-24-2018 10:07 AM

The standard for years has been to use the old ford starter relay that bolts to the side fender apron. Both cheap and reasonably reliable. Still available easily as well but this may pass with time.

Did I forget to mention cheap and normally deals with the full current in a ford starter? Actually I have never heard of a reasonable alternative to them.

Mxfrank 11-24-2018 11:00 AM

Quote:

Originally Posted by barry12345 (Post 3864396)
The standard for years has been to use the old ford starter relay that bolts to the side fender apron. Both cheap and reasonably reliable. Still available easily as well but this may pass with time.

Did I forget to mention cheap and normally deals with the full current in a ford starter? Actually I have never heard of a reasonable alternative to them.

Ford starter solenoid would have been my choice. But he’s showing something with DIN terminal designations, thus the question.

vwnate1 11-24-2018 11:25 PM

Glow Plug Control
 
Jeeze ;

Don't screw around with barnyard starter relay bodge repairs ~ fix the darn thing properly, there's myriad posts on how to do this using cheap junkyard parts .

jsp300D 11-25-2018 09:01 AM

https://imagizer.imageshack.com/v2/8...923/TDpQlR.jpg

I want to keep the original relay to use it as a timer.

https://imagizer.imageshack.com/v2/8...921/WSHixt.png


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