Oh NOOOOO! Stripped ignition coil screws
Thread Starter
Member
Joined: May 2015
Posts: 132
Likes: 1
2000 C230 Kompressor
Oh NOOOOO! Stripped ignition coil screws
Was working to replace the spark plugs on my 2008 C300 Sport this morning. The screws on the ignition coil were very difficult to remove (don't think the previous owner ever bother to replace the spark plugs) and they are made of somewhat soft metal which is very prone to stripping. Anyway, long story short, I've stripped one of them and another one is not looking good either. Could someone please advise on a plausible solution to remove the stripped screw(s)?
A supposed easy job is now turning into a mess.
But even with just two out of 6 replaced, I can feel the engine feels peppier....which is encouraging.
A supposed easy job is now turning into a mess.
But even with just two out of 6 replaced, I can feel the engine feels peppier....which is encouraging.
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,012
From: Miami, FL
2003 CL 600
You rounded the head of the screw off? Use a socket for stripped bolts, they have a twisted design inside that cuts in deeper as you try to loosen the bolt so they grip. Will not be able to re-use those bolts but they will come out that way.
You are using the proper size tool on the coil bolts right?
You are using the proper size tool on the coil bolts right?
Thread Starter
Member
Joined: May 2015
Posts: 132
Likes: 1
2000 C230 Kompressor
Thanks. I got it resolved. What I did is that I bought better T30 driver and applied tons of downward force and quick, impact turn to loosen up the screw. No way I am putting the same screws back in so I am letting two of ignition coils held down by one screw only currently.
Anyone know the correct size for the screw? The width and length? I look up a couple of parts site they don't list it out.
Anyone know the correct size for the screw? The width and length? I look up a couple of parts site they don't list it out.
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,966
Likes: 1,315
From: Republic of Texas
'99 and '05 E55 AMG
Part number for the single bolt used to attach the coils on the E-class is A 001-990-72-12. You phrased it in such a way that it sounds as though you have two bolts per coil.
eeuroparts carries the bolts for $1.49 each.
Ebay has them for 99 cents each.
Do a search on Mercedes coil pack screw size.
eeuroparts carries the bolts for $1.49 each.
Ebay has them for 99 cents each.
Do a search on Mercedes coil pack screw size.
Last edited by bbirdwell; Oct 29, 2018 at 02:41 PM.
Trending Topics
Thread Starter
Member
Joined: May 2015
Posts: 132
Likes: 1
2000 C230 Kompressor
This?
https://www.ebay.com/itm/1998-2003-M...S!-1:rk:3:pf:1
Hmmm, doesn't look like it. The thread itself may be a fit but the head looks different. Mine is wider and flatter.
https://www.ebay.com/itm/1998-2003-M...S!-1:rk:3:pf:1
Hmmm, doesn't look like it. The thread itself may be a fit but the head looks different. Mine is wider and flatter.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Oct 2008
Posts: 2,601
Likes: 28
From: Atlanta, GA
2008 C300 Sport 6 Speed Manual, 1953 Chevy Bel-Air, 2015 Audi allroad, 1963 Chevy Apache
Thread Starter
Member
Joined: May 2015
Posts: 132
Likes: 1
2000 C230 Kompressor
What bothers me is how soft the metal is. Since I don’t expect to ever replace them again so no anti-seize applied. I know one day i may have to eat my own words.
