Technical Correct glow plugs?

[Jayw1984]

After many issue I finally managed to solve issue and was apparent x 2 glow plugs are shot, anyway managed to remove old glow plugs no issue really.
however I came to fit new glow plugs (said was correct ones when ordered from euro car parts) Old ones were the orginal bosh and new ones are bosh replacements.
According to manuals etc they should be 9mm hex (spanner size) however ones I took out had 10mm heads, and new ones I brought were 8mm heads.
On the new ones the threads looked noticeably smaller tried fit one and went in but definitely the wrong threads as still movement so removed and put old ones back in for time being.

Has anyone got the correct oem part number for 2015 (new shape) 1.3 90 multijet? All ones I've found on line come up with 8mm heads or 9mm heads not the 10mm

 

[bugsymike]

After many issue I finally managed to solve issue and was apparent x 2 glow plugs are shot, anyway managed to remove old glow plugs no issue really.
however I came to fit new glow plugs (said was correct ones when ordered from euro car parts) Old ones were the orginal bosh and new ones are bosh replacements.
According to manuals etc they should be 9mm hex (spanner size) however ones I took out had 10mm heads, and new ones I brought were 8mm heads.
On the new ones the threads looked noticeably smaller tried fit one and went in but definitely the wrong threads as still movement so removed and put old ones back in for time being.

Has anyone got the correct oem part number for 2015 (new shape) 1.3 90 multijet? All ones I've found on line come up with 8mm heads or 9mm heads not the 10mm

Any chance engine has been changed in the past, older style engines tended to have larger heater plug spanner size.
I would also check the voltage written on them as I fitted a set to my 2010 1.6 Doblo which had the small heads (8mm) and they were actually 4.4 volts, some older stuff often ran at 11.volts approx.
I did try to look at my 2014 Vauxhall Combo1.3MJ, but the rain is pi**ing down so sod it.

 

[Jayw1984]

Don't think engine has been changed to my knowledge but guess but if has without paper work I'd never know i guess, model year is at point of change over tho new shape / newer engine with new engine suppose to be 2016 onwards cut in i think i read so could be just mine has the older style engine in perhaps? Unless it's had the a new head at some point but again nothing on paper work and have most receipts for work carried out, No idea I'll have to take out the glow plug again next weekend and see if part number is on it and voltage

 

[Abarthmultijet]

The correct glow plugs at the cars i've worked on (2010-2014) are: Bosch 0 250 403 014

4.4V and 9mm spanner

 

[Jayw1984]

The correct glow plugs at the cars i've worked on (2010-2014) are: Bosch 0 250 403 014

4.4V and 9mm spanner

Ok I'll have take the old one back out and double check tried get it out with a 9mm and couldnt got a 10mm and came straight out so weird as I was under impression was 9mm too defo wrong ones I've been supplied anyway as they are 8mm and a different thread

 

[bugsymike]

Ok I'll have take the old one back out and double check tried get it out with a 9mm and couldnt got a 10mm and came straight out so weird as I was under impression was 9mm too defo wrong ones I've been supplied anyway as they are 8mm and a different thread

@Abarthmultijet has probably the correct details for your model.
My only concern is if someone has changed the engine for an older version, so I would take an original duff heater plug for a pattern when buying new, also I would double check what voltage is written on the old heater plugs and also what supply voltage you are getting to the new ones from the relay.
Even if the new ones fit in the engine, if the wrong voltage they will be destroyed.

 

[Jayw1984]

@Abarthmultijet has probably the correct details for your model.
My only concern is if someone has changed the engine for an older version, so I would take an original duff heater plug for a pattern when buying new, also I would double check what voltage is written on the old heater plugs and also what supply voltage you are getting to the new ones from the relay.
Even if the new ones fit in the engine, if the wrong voltage they will be destroyed.

Ah ya makes sense, I've checked engine number etc and is defo correct and original engine obvs doesn't mean hasn't had head changed or anything in past but I've found all old receipts and paper work and cant see any major work being done I'll shall remove glow plug again at weekend to get correct one maybe it's had them changed in past and they've fitted the wrong ones perhaps

 

[bugsymike]

Ah ya makes sense, I've checked engine number etc and is defo correct and original engine obvs doesn't mean hasn't had head changed or anything in past but I've found all old receipts and paper work and cant see any major work being done I'll shall remove glow plug again at weekend to get correct one maybe it's had them changed in past and they've fitted the wrong ones perhaps

Do check voltage as I got caught out years ago with a customers Bedford Midi with the Isuzu diesel engine, they all lit up red when I put voltage to them, refitted and it wouldn't start as I had blown the full set. Which I had to replace.
In my defense up until then I had only come across 12 volt ones, so standard practice was to test across a battery.
Since then I have seen many modern heater plugs with a variety of voltages.
It is usually written on the metal bit below where the spanner fits on.

 

[Jayw1984]

Ah well explains the ones I received are wrong the ones I received are 11 volt 8mm so they defo wrong just need check ones are in is saying online should he 4.4v 9mm so maybe if been changed in past they'd jusy put wrong ones in

 

[bugsymike]

Ah well explains the ones I received are wrong the ones I received are 11 volt 8mm so they defo wrong just need check ones are in is saying online should he 4.4v 9mm so maybe if been changed in past they'd jusy put wrong ones in

Usually the smaller spanner size ones are the lower voltage type , but I would check with a meter what is coming from the relay as you could destroy the new ones.
Often the difference is different thread size , but also internal measurements , so if you screwed the wrong ones in and turned the starter it could snap them off causing even more trouble!!!

 

[Jayw1984]

Usually the smaller spanner size ones are the lower voltage type , but I would check with a meter what is coming from the relay as you could destroy the new ones.
Often the difference is different thread size , but also internal measurements , so if you screwed the wrong ones in and turned the starter it could snap them off causing even more trouble!!!

Ya thays why not replaced as thread size was completely wrong anyway ill test what voltage is getting to them before ordering a new set

 

[Abarthmultijet]

I'm almost certain that even when it says 4.4v on the glow plug that the voltage they recieve is still 12v

 

[varesecrazy]

Ah ya makes sense, I've checked engine number etc and is defo correct and original engine obvs doesn't mean hasn't had head changed or anything in past but I've found all old receipts and paper work and cant see any major work being done I'll shall remove glow plug again at weekend to get correct one maybe it's had them changed in past and they've fitted the wrong ones perhaps

Shop4parts will list what you require

 

[bugsymike]

I'm almost certain that even when it says 4.4v on the glow plug that the voltage they recieve is still 12v

Sorry disagree, recently changed a set on my 1.6 Doblo Multijet and first I used a voltmeter at the relay so 4.4 volts.
Try putting 12 volts across one, I have done it in the past accidentally, the result was I had to buy my customer a new set.

 

[Abarthmultijet]

Sorry disagree, recently changed a set on my 1.6 Doblo Multijet and first I used a voltmeter at the relay so 4.4 volts.
Try putting 12 volts across one, I have done it in the past accidentally, the result was I had to buy my customer a new set.

Hmm no need to say sorry, I always test with 12v, but will test one if I have one in workshop.