View Full Version : Installing new glow plugs, got a question

09-28-2013, 12:05 AM
I am needing to replace the glow plugs in my Sprinter and would like to know if all glow plugs are the same. I found a set of 6 on Ebay, 20 miles from home, for $120. They are Mercedes-Benz / Sprinter 6 pcs Glow Plug Set - BOSCH - 0250403008 / 80050 OEM MB
Bosch # 0250403008 / 80050 - OE # 0011595001 0011597101
Just don't want to purchase the wrong ones. I plan to do the work myself.

.... or these..also on Ebay for $18 each MB
BRAND NEW! Sprinter 3.0 Diesel Glow Plugs 07-10

Also, when installing, do I need to put anti-seize on the threads as I would a spark plug?

09-29-2013, 03:05 AM
Also, when installing, do I need to put anti-seize on the threads as I would a spark plug?

Why would you ever put anti-seize on a spark plug?:idunno:

09-29-2013, 03:16 AM
It's the best maintenance step sense sliced bread particularly with aluminum cylinder heads. Race car mechanics have been doing this with cast-iron or aluminum heads for 50 years. The secret is moderation. Brush a very small amount from the first thread back toward the taper or gasket then wipe with a paper shop towel. Don't get any never seize on the porcelain or electrodes.

The reason for the never-seize is to protect the threads in the cylinder head. The spark plugs will never stick if you apply the never-seize correctly. You will have a better "feel" for tightening the plugs also.

The anti-sieze is to keep the threads from siwzing or galling so that the plug can be removed without any damage to the threads. It is not for sealing. It is not a necessity, just adds some extra protection.

It is a must with aluminum heads. Corrosion can occur (electrolisis) between steel and aluminum, anit seize keeps that from occuring......If corrosion occurs bad enough you will pull the threads out of the head when removing the spark plugs.....If that occurs then thats what heilicores are designed for!!!.
Best to use anti-seize compound to be safe.........It has nothing to do with the performance of the engine..

But other than those reasons, cannot think of why anyone would. :laughing:

09-29-2013, 04:59 AM
OK, I understand racing vehicles, but normal street vehicles does not need this. I had many many gas vehicles and never had problem to remove spark plug. As a example, my former cargo van Chevy Express 2005 had original plugs with 160K. When I removed it, was nothing to do, just put it back.

09-29-2013, 12:36 PM
I have done this for over 30 years on many different kinds of engines , for all the reasons given by nctrailseeker .

I used to work on french cars & jap super bikes ( Stop laughing ! ! ! !) fitted with alloy heads and have lost count of the number of times i have removed & helicoil inserted a cylinder head due to a spark plug galling & tearing threads out . Most of these were engines that only got serviced when they died & we recovered them . 70's /80's french alloy was not the greatest product ever & jap "bendy" alloy was much the same for the same time period , but plugs used to feel like they had welded into the head .

Nowadays , i use the Febi ceramic grease as meant for use when fitting injectors . As it does not use copper as its barrier material , it is unlikely to contaminate any high voltage insulators or poison the catalytic converter either . One worth bearing in mind for any cat equipped vehicles

09-29-2013, 01:24 PM
Europarts has the O.E.M. glow plugs and aftermarket glow plugs for very reasonable prices. There is a 4.4 volt and a 7.0 volt glow plug be sure you purchase the 4.4 volt plug. And yes a little anti-seize would be advisable. I ran an automotive machine shop for years and we specialized in Mercedes and Euro engines always used anti-seize!
Best of luck in your repair

11-16-2013, 09:53 PM
AND, well 2 things really, could the drivers side glow plugs be any harder to get at? Also, what's up with the small size? Probably no answer to these, whiney snively statements. Just went looking for mine today and soaked them in some liquid wrench. Put everything back together. Will have more to complain about tomorrow after going for a ride and attempting to replace them.

11-16-2013, 11:17 PM
There are at least two types of anti-seize. I prefer the copper based ones like coppaslip.

11-17-2013, 02:06 AM
Copper based anti-seize on a steel glow plug shank being screwed into an ALUMINUM cylinder head casting?????
Probably far worse than no anti-seize at all.
I've heard that new Beru glow plugs do not require anti-seize as they are nickel plated.
I like Never Seize brand which has a small amount of copper but mostly graphite/zinc/aluminum and works works far better around aluminum.
Here the composition of Never-Seize:
Ingredients Name CAS Proportion
Grease 60-100 %
Synthetic graphite 7782-42-5 10-30 %
Copper Powder 7440-50-8 1-10 %
Zinc oxide 1314-13-2 1-10 %
Aluminum flake 7429-90-5 1-10 %
I've also heard that a little dab of white ceramic grease on the threads only is recommended for the unplated Bosch glow plugs.
Hope this helps,
P.S. To grease or not to grease/use anti-seize is really a hot topic.
Beru does nickel plate their glow plugs and that would seem to be a permanent way to prevent stuck glow plugs,
but Beru also sells kits with glow plug removal and installation tools and the kit includes their special
"Glow Plug Installation Grease"
Here's a .PDF from Beru with everything you might ever want to know about their glow plugs/grease/tools.

11-17-2013, 12:41 PM
Copper based anti-seize on a steel glow plug shank being screwed into an ALUMINUM cylinder head casting????? Great emotional response! Copper is less susceptible to heat than aluminum/zinc preparations. Copper was the choice for most mechanics I knew who had to deal with aluminum heads. I was glad to see them discontinue lead which was common 30 years ago.

11-17-2013, 02:36 PM
Copper might be less susceptible to heat, but increases the galvanic corrosion potential significantly.
It's not an emotional response....it's based on ~50 years of experience working on Navy ships (diesel and steam powered), marine large and small gas and diesel engines and outdrives, race cars, well pumps, you name it, I've probably worked on it.
I got that education as an apprentice when I was 19 years old, and the master mechanics that taught me had as much or more experience than I have.

11-17-2013, 05:16 PM
Great, then you know that the galvanic action you refer to requires the vessel to be immersed in an ocean. Some of our Sprinters might resemble land yachts, but they aren't exposed to the same corrosive environment as that found on a marine vessel.

What we do have is heat. Oodles and oodles of heat. If the anti-seize components melt easily (lead, tin and zinc) then it's possible for them to braze components together. We already have that problem with the aluminum alloy head, so why would we want to go even lower?

Tin: 450F
Lead: 621F
Zinc: 787F
Aluminum: 1220F
Copper: 1983F

11-17-2013, 05:51 PM
I'm done with this!
If you lack the understanding that galvanic corrosion is present in all atmospheres on land, at sea, in the air, I'm certainly not going try to educate you about dissimilar metals and the galvanic series.

11-17-2013, 06:48 PM
If you lack the understanding that galvanic corrosion is present in all atmospheres on land, at sea, in the air, I'm certainly not going try to educate you about dissimilar metals and the galvanic series. More emotion. It's not working for you.

Galvanic reactions require immersion in an electrolyte. So, where's the electrolyte in the engine compartment? I've worked in the automotive field since 1969. I've also apprenticed in the Chemistry machine shop and most recently have worked on a number of boats here in Key Largo. Granted that for the past 10 years, I have made my living on the interwebs, but you can be sure that I have not been far from my roots.

While there can be some galvanic like corrosion around the battery terminals in the engine compartment, and obvious leaching in cooling systems, I have yet to see galvanism around any head including spark or glow plugs on a land based vehicle.

11-17-2013, 08:36 PM
Didn't even try the plugs today. The biggest lesson I learnt yesterday was: the farther I try to stick my head under the Sprinter hood, my buttocks was still out in the rain. And it's still raining...

12-09-2013, 03:19 AM
So any update on your success. My light just went on, engines stumbles bad starting cold. I assume glow plugs are shot, more than one based on the way it started.