[W126 Coupe] timing chain question

[Attila]

	Thanks for the feedback, Josh.  I think @ 180k
	we will replace both camshaft gears.  However,
	I have never heard of replacing the crankshaft 
	gear.  The dealer here priced it out and it is rather
	expensive and I'm not certain it is necessary.
	Hence my question.

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Josh Allen
Sent: Tuesday, August 11, 2009 2:12 AM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] timing chain question

Attila wrote:

>

> Has anyone replaced the crankshaft gear, when

>

> doing a timing-chain ?? We plan on doing both

>

> camshaft gears, but not sure about the crankshaft.

>

> Is it a good idea as a preventive measure ?? This

>

> is an '89, 420SEL, with around 180k miles. Thanks.

>

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I know I left the sprockets in place on my 500SEC when I replaced the 
guides and chain, but I saw no signs of wear on the cam ones, and they'd 
be the first to show wear due to the smaller size.

I'm not sure just how necessary it is thought to be, though.

-Josh Allen
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Postings remain property of MB Coupes, L.L.C.