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  #1  
Old 09-08-2012, 03:40 PM
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210 chassis bad glow plug

For the past month or so there has been a slight rough idle for a few seconds when I start the car. Finally yesterday I got around to checking the glow plugs. Turns out #3 is reading bad. All the others were reading about 0.8 ohms. Interesting thing is that I had no check engine or glow plug light on. This is the second time I had one plug go bad and got no warning lights. Once I had two plugs bad and did get both the check engine and glow plug light.

So I will soon see if my theory holds up about how easy the plugs are to remove on a hot engine with anti-seize lathered plugs.

I just checked my records and I have replaced glow plug #3 twice in the past 18 months, but both times with good used glow plugs. It's been a really long time since I replaced them all with new ones. Since I've got new ones on hand, maybe I'll just replace them all and keep the good used ones for spares.
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'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - being parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 212,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 15,000 miles
'14 Smart electric cabriolet 5,000 miles
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  #2  
Old 09-08-2012, 06:35 PM
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I'm sorry your back in familiar territory. Did you use Bosch or Beru glow plugs when you finally got your previous situation under control? Skip the Bosch and go with Beru. They've got so much more material for the wrench flats to grip on to. May God go with you on your gp removal. Your original thread scared the **** out of me. I'm at peace now since I changed all 6 and replaced with Beru and Beru grease.
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1985 300TD Still 225,000
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  #3  
Old 09-08-2012, 07:33 PM
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Quote:
Originally Posted by sokoloff View Post
...hot engine with anti-seize lathered plugs...
That is important when it come time to change them.

I have always used anti-seize and never had a plug that was even close to being stuck in 300k.

Reaming the holes with a proper reamer is important to making them last longer between changes.

I also had one plug hole that was burning out plugs like crazy. I got a reamer and now all the plugs last about the same amount of time.
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2007 ML 320 CDI
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
Previous:
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1984 190D (Deerslayer) on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix to get a make over
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO

2007 ML320 CDI .. / 2005 E320 CDI .../ 1998 SLK 230 .../ 1991 Daihatsu Rocky
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  #4  
Old 09-08-2012, 09:40 PM
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Location: Cambridge, MA
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If you've got a new one on hand, at least put a new one in #3... I had one that was stuck and gave me flashbacks to your mess from many years ago; that one was all carboned up and I really had to spend a fair amount of time reaming it to get it cleaned out. Don't be shy on the reamer.

As for changing them all, I did but I'd have really regretted it if I managed to break a perfectly functioning glowplug in my desire to "do the job 'right'". Almost certainly the right thing, but I'd get the engine HOT first, and might even try to crack them all as quickly as I reasonably could. Number 6 gave me the most hassle, and the engine was really cooled off before I got to that one. Given how much carbon it had, I suspect it was going to be a ***** no matter what, but being hot would have been helpful I think.

If you get one that's really stuck, nothing says you can't leave it in there, reassemble the others, start the engine and heat it BACK up.
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  #5  
Old 09-10-2012, 11:50 AM
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Well, I'm sticking by my story - change your glow plugs on a hot engine and use a generous amount of anti-seize. I got to my bad plug yesterday and just changed them all. Did it on a hot engine and they all broke free rather easily and all came out with no issues. Reamed the holes about three times before the carbon seemed to clear up. Also cleaned out the manifold. It cleaned up very easily with just carb cleaner since I had done it about a year and a half ago and it wasn't very bad this time around. Also replaced a few of the broken plastic injector line clips while I had access to them.
Attached Thumbnails
210 chassis bad glow plug-img_0611.jpg   210 chassis bad glow plug-img_0612.jpg   210 chassis bad glow plug-img_0613.jpg   210 chassis bad glow plug-img_0614.jpg   210 chassis bad glow plug-img_0615.jpg  

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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - being parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 212,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 15,000 miles
'14 Smart electric cabriolet 5,000 miles
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  #6  
Old 09-10-2012, 12:41 PM
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Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
beru

Looks to me like #2 is a Beru.
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2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
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  #7  
Old 09-10-2012, 01:25 PM
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Join Date: Jul 2003
Location: Ocean Isle Beach, NC
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Good eyes and good catch. #2 is a Beru with the Mercedes star on it.
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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - being parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 212,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 15,000 miles
'14 Smart electric cabriolet 5,000 miles
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