Timing Chain (Was Re: Between a Rock and a Rock: Repair or Replace

[Ti Kan]

The purpose of putting the timing chain in the back on these V8 engines
is to make them shorter, so that the engine would fit in the small
engine bay of the B platform.  By doing away with the timing belt,
and substituting a rear-mounted timing chain, they shortened the engine
by 2 inches.

On the A8, A6 4.2, S6 and RS6, etc., the V8 in there still has the
timing belt up front.  There is no space issue on those cars.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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Bhatti, Mohammed writes:
> Ok, just thinking out aloud here, but why can't you have a timing chain
> in front of the engine.  Why the back where, if it breaks, and I believe
> they do, it would mean removing the engine to replace.
>  
> mohammed
> 97 A4 1.8tqa
>   
> >>>>>>>>>>>>>>>>>>>>>
> Check out the NEWSET brochure for the S4 and V8 4.2 engines:
> S4 catalogue, Page 20:
> "By replacing the belt in the front with a chain that drives the dual
> overhead camshafts from the rear of the engine, we were able to trim off two inches
> off our potent 4.2 liter V8........."
> Let me rewrite that: Chain means less claims and warranty expenditures for
> AOA.
> Cubic inches are cheaper than turbos..................Chains are BETTER than
> belts.
> -Scott by BOSTON
> <<<<<<<<<<<<<<<<<<<<<<<<