Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 09-28-2009, 03:05 PM
Registered User
Join Date: Sep 2009
Posts: 6
Head bolt tools Torx T-55

Pulling the head on a 96 C-220 4-cyl. Have the proper size T-55 tool for the head bolts, (reading earlier posts about the cheap tools I got a good one at craftsman) but since this one is 1/2 inch drive-- large diameter like a socket- it will not fit down inside the head to reach the head bolt. But, the way it is constructed, I can take the "star bit" part out of the tool body by loosening a setscrew. This part fits perfectly in a 6-point 1/2" inch socket, and this combination WILL go into the head to reach the head bolt. After I pulled about 60 ft lbs of torque it felt like something was stripping so I immediately stopped. Question- do these head bolts typically release gently instead of snapping loose with a loud clink like an american car? These bolts are oiled and tightened to "stretch" instead of "torque" so they may have a different "feel" when breaking them loose. ?? Tools came out showing no signs of stripping but I haven't shined a light into the head bolt to inspect it yet. Hate to have to drill one of these out, they are cold hardened steel! Any recommendations for the perfect tool for this? Snap-On or Mac ? 3/8 or 1/2 drive? Thanks!

Reply With Quote
Old 09-28-2009, 03:16 PM
Registered User
Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
MB head bolts are usually 12 point (ie: triple square) bits, not 6 point torx bits. You just learned why you dont use 6 point bits in a 12 point hole.
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
Reply With Quote
Old 09-28-2009, 06:01 PM
Registered User
Join Date: Sep 2009
Posts: 6
Woops! Glad I stopped when I did, with only one bolt. Going home to inspect for damage now. I'm not looking forward to drilling the head off this bolt. Thank you for the lesson TM.
Reply With Quote
Old 09-28-2009, 06:13 PM
babymog's Avatar
Loose Cannon - No Balls
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
They drill easily, ... unless there happens to be a broken bit in it.

Gone to the dark side

- Jeff
Reply With Quote
Old 09-29-2009, 12:58 PM
Registered User
Join Date: Sep 2009
Posts: 6
I need what is known as a ZXN 12-point tool for the head bolts. Trying to figure out if my 1996 4-cyl (believe it is a M111 engine) needs the 10mm or 12mm version. The clue is the T-55 torx fits it perfectly. But it is a 6-point and will strip out. thanks for comments -don
Reply With Quote
Old 09-29-2009, 03:59 PM
Join Date: Jan 2003
Location: Florida
Posts: 1,084
I think there is a tool loan program on this forum, and I saw one there for $5. I think the program also suggests buying it and the returning it less a small charge.
Reply With Quote
Old 10-05-2009, 06:05 PM
Registered User
Join Date: Sep 2009
Posts: 6

Found the correct tool at NAPA here in Indianapolis. 7 dollars. It is a 12-point serrrated wrench of very good quality. My C220 4-cyl needed a 12 mm size. Also see them on eBay. Too busy the last few days to move on the project but should have the head off within a few days....then we shall see why #2 has no compression. Thanks.

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 01:52 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page