Stripped Threads, Alternator Bolt (M112)

Oct 11, 2022 | 08:44 PM

Jerry Easley

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Joined: Sep 2020

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From: Arkansas & California

'00 CLK320, '01 ML320 Designo, '01 ML320 Sport; '04 CLK320 Coupe Avantgar; '04 C230 SportCoupe (HB)

Stripped Threads, Alternator Bolt (M112)

Thinking this is the appropriate forum: I have a stripped thread on the upper alternator screw (bolt) for my M112, which torques at 40Nm.

Stripped threads, damage is visible. There is plenty of room to drill thru and use a longer bolt/nut to secure the alternator.

Is this a good candidate for:

a. A helicoil
b. Drill thru and fasten a longer bolt with a serrated or fiber-insert nut, or
c. Suggestions, please.

Yes, I could replace the timing cover, gaining a 'new' tapped hole - but that is a big time chore.

Oct 13, 2022 | 08:24 AM

machild

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Joined: Jun 2020

Posts: 1,177

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2006 CLS55 AMG, 2005 SLK 350 AMG

Quote:

Originally Posted by Jerry Easley

Thinking this is the appropriate forum: I have a stripped thread on the upper alternator screw (bolt) for my M112, which torques at 40Nm.

Stripped threads, damage is visible. There is plenty of room to drill thru and use a longer bolt/nut to secure the alternator.

Is this a good candidate for:

a. A helicoil
b. Drill thru and fasten a longer bolt with a serrated or fiber-insert nut, or
c. Suggestions, please.

Yes, I could replace the timing cover, gaining a 'new' tapped hole - but that is a big time chore.

Situation that helicoil was made for. Good luck.

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