is there a away to test your glow plugs

[arkamelis]

can glow plugs be tested while in the car ?

 

[momomo]

What sort of problem is the car experiencing?

 

[momomo]

Have a read of this thread - easiest way to diagnose glow plug system - video - PeachParts Mercedes ShopForum

 

[NISFAN]

Simple answer, yes you measure the resistance across it.

 

[arkamelis]

one of my plugs was not connected, so i looked into it and turns out its a damaged one, common problem with glow plugs, sometimes the bolt head snaps and then your buggerd, it has to be drilled out, or head off. i know someone who will do the job for me "drill it out " but he asked me to check the other ones aswell, false economy not to. so i need to check the rest of the plugs to see if thay are working ok

 

[nick.ged]

if ones gone, chances are the rest aint far behind, swap them as a set.

 

[arkamelis]

makes sense. thanks

 

[rizlar]

I just had my Glow Plugs changed as a set. One of the them broke off while they were trying to remove it and they had get a get a specialist in to drill it out and re-thread the hole. The glow plug change was £240 plus £120 on top for the re-threading. I wasn't happy but better than a new head, I suppose.

 

[NISFAN]

Ouch, I am feeling especially lucky now that mine only cost me £30 to replace all four.