Timing Chain Failure

[Benz Dr.]

And that's why you pay me the big bucks. ( well, sort of) I go to great lenghts to make sure I make no mistakes while building engines. Keep me away from your rad cap though..........

Dan Caron's
 SL Barn
benzbarn@ebtech.net
 slbarn.mbz.org
  1 877 661 6061

[Skitzerow]

Well I am getting my engine back together and got my new crankshaft sprocket gear.  I think somewhere along the way my chain may have slipped a link.

But if you look at these pictures you will see how much wear was on the old sprocket gear versus the new one. I have to say all my other idler sprockets and camshaft sprockets look great.  May have not worn much because the others are bigger and would distribute wear over a much larger circumference and number of teeth than the crankshaft sprocket.

I might also note that my smaller original timing chain guide was broken in half at one of the mounting holes.  The one half that fell off was chew up quite a bit.

Here are pictures of a new and old one.  The old one has about 116,000 miles on it.

Well scratch the pictures. This forum is not accepting the jpg format at the moment.  I will have to review how to send pictures here.

SDK

[rwmastel]

SDK,

It's probably the picture size, cut it down to under 80kb.

Rodd
Powell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both  tops
1994 E420

[ja17]

Hey Naj,

How is this project coming along, while we're on the subject?

Joe Alexander
Blacklick, Ohio

[Naj ✝︎]

Hello, Joe,
 

quote: Hey Naj,

How is this project coming along, while we're on the subject?

Joe Alexander

Car is now with Rhodrich, after new chain and sprockets, engine running sweet as a 'nut':

http://index.php?topic=5377

He's been giving it Italian tune ups  :oops:

naj

68 280SL

[Rhodrich]

Indeed- 1700 miles driven in the past 2 weeks without any problems in my tours of the UK! (pic below in the car park at Stone Henge)





1965 230SL