what glow plug to use , 24v bj42 manual switch

[jim land]

hello , i know about search fonction and read a lot of threads on glow plug and Wilson switch but my brain start to hurt
i need some clarification on what glow plug to use on my 84 bj42 , it is 24v and im going FULL manual
(no timer , no glow light, no factory box at all) , just a momentary switch and a relay

i think i need 10.5v but also read i need 23v or 14.5v

 

[jim land]

i found this , is this good

 

[brownbear]

There is a thread on the top of the forum list specifically saying which plugs to use. It's stickied. Meaning permanently at the top of the page.

 

[jim land]

so i need 23V
can i use the factory relay that is bolt to the radiator support ,for my Wilson set-up ?

 

[lostmarbles]

so i need 23V
can i use the factory relay that is bolt to the radiator support ,for my Wilson set-up ?

I don't know of any factory relay that was ever bolted (by the factory) to the radiator support of a BJ42..

Do you have a photo Jim?



Edit: Whatever you use, it needs to have a 24V operating coil and should be rated at handling 20-25 amperes or better/more

 

[brownbear]

I used the stock relay when I went wilson on mine!

 

[jim land]

Here the pic Tom , i dont know what is the purpose of this one , i really need a service manuel to identify parts , im new to diesel LC

 

[jim land]

 

[lostmarbles]

Here the pic Tom , i dont know what is the purpose of this one , i really need a service manuel to identify parts , im new to diesel LC.....

Thanks Jim

This just goes to show that I'm not as familiar with the BJ42 model as I thought I was.

That is indeed your original main glow relay and it's in the correct/original location too (so it can indeed be used for your planned "Wilson Switch preheat").

Sorry to mistakenly raise doubts..

 

[jim land]

you are a diesel Master , even if you didn't know you still got the answer

 

[jim land]

do you have a 24V 3b ?

I used the stock relay when I went wilson on mine

 

[jim land]

after a lot of reading ,i think my 42 have superglow, so here more question with a picture to make myself clear

1- do i still need the 23v gp ?
2- do i deconnect those wire (red arrow) ?
3- do i remove the flat steel (yellow arrow) ?
4- this part is not going to be use anymore (blue arrow) ?
5- can i keep the edic for now or it has to be deleted when going to Wilson switch

the light green arrow is a wire the PO install as a temporary solution ,house wire to a momentary switch connect to battery .

the switch will be reused for my new set-up , the actual plug are 16v and 3 are burn

 

[jim land]

po set-up

 

[jim land]

ok , all part number list for 23v plugs on the first page of the sticky dont work in all the local parts place in quebec canada
i found new info on the sticky at post 70 and 71 ,but 4wheelauto dont list pt-153 anymore , all i find on there is 20.5v ngk y-178
will it work for my set-up ?

 

[Firewout]

links to service, owner and maintenance manuals (file size between 10 and 131 MB):
1986_maintenance_procedures.pdf
3b-engine.pdf
BJ42LX_OriginalManual.pdf

 

[lostmarbles]

Hi Jim

In your first post you said you were going "full manual" for your preheat:

.... im going FULL manual
(no timer , no glow light, no factory box at all) , just a momentary switch and a relay...

You've made this decision (apparently) and for this you need 23V plugs (to replace the 14V plugs that should be in there now for that original superglow setup).

Yes. All that superglow stuff needs to go (or at least be disconnected) if you intend to go ahead with your "simple full-manual preheat" (aka "Wilson Switch preheat") plan.

With "Wilson Switch preheat", your switch controls the relay and the relay simply sends 24V from your battery to your glow plug busbar. You count 20 seconds in your head, and then turn the key to the cranking position in order to start.

Because you don't want your plugs inadvertently left on, the switch should be "the momentary type" whereby your finger must overcome an internal spring to get the "on" position (and the spring will automatically revert the switch back to it's "open position" as soon as you finger is removed).

So the thick 24V supply cable (from your relay) goes to your busbar (which is connected to your 4 glow plugs) and everything else connected to the busbar gets removed/disconnected. The temperature sender, current sensor, timer, glow sub-relay etc (used to control your old superglow preheat) will then be all superfluous.

If you want, you could put a little light on the dash that glows whenever you have your finger on the momentary switch (as an added touch).

As for what the PO has done with that switch etc, they probably used that for "afterglow" to re-energise the busbar (at will) once the engine is running to get it to run more smoothly after start-up in extremely cold weather.

 

[jim land]

thank , that was the way i understand it but i just want to be sure i make no mistake

i will call 4wheelauto this afternoon for plug

 

[lostmarbles]

BTW- The 20.5V plugs are for use with a "glow controller" (that you don't have).

In your country are you prevented from making purchases ANYWHERE YOU WISH overseas via the Internet? (I'm wondering if perhaps your government puts obstacles in place - like excessive import duties and customs-clearance-paperwork?)

(I would get even more grumpy than I already am if I were to lose the ability to make purchases anywhere in the world. But then this country is tiny so we must experience difficulty sourcing many more things than you would Jim.)

 

[jim land]

maybe you are grumpy but you are generous and patient with diesel ignorant like me , thank

dont go too far , i got alot more question to come

 

[FatalErrorStu]

Just adding my Wilson switch setup here, I hope it will help someone: My Wilson switch setup with anti-clockwise twist to glow on the ignition - https://forum.ih8mud.com/threads/my-wilson-switch-setup-with-anti-clockwise-twist-to-glow-on-the-ignition.1256572/