glow plug reamer or not?

[GinE39530D]

please advice what reamer to buy preferably with link
or how to remove gunk without special tools
thanks


e39 530d m57

[JimLev]

No E39 diesels on this side of the pond.

[DennisG01]

Are they not working properly? If they're not getting red hot, cleaning isn't going to help. If they're getting gunked up, you may have other issues such as burning oil (engine) in the combustion chamber... although dirty diesel can sometimes do the same thing over a long time. You can gently scrape any large chunks off... brake cleaner works well for soft/gunky stuff... for harder deposits you can try soaking them overnight in something like Yamaha RingFree or Chevron Techron.

I don't know what voltage yours operate on - many cars are 12V, but my Mercedes (for example), is 5V. If it's 12V, that's easier - jump 12V to the plug (after removing) and see how quickly it gets hot. Another good test is a resistance test - you'll need to find out what that is for your plugs, but most are very low... like 1.5-ish Ohms to be good.