[s-cars] replace water pump and serp belt

[Paul Heneghan]

I did a water pump back in January. By the time I got to the pump, there
was so little extra work to do to replace the t-belt that I did that as
well even though it had been done a year (10k miles) previously. Providing
you have the locking tool (3256) and a big torque wrench it's really not
that much extra work.

Typing 'AAN timing belt' into google gives 47,000 hits, amongst the first
few are:
www.sjmautotechnik.com/trouble_shooting/S4timing.htm
s2central.net/Timing_Belt_Renewal_Rev1.pdf
12v.org/urs/FredMsTimingBeltR&RDIY.pdf

All are combined procedures (serp belt, water pump, timing belt). Just do
the bits that apply to you. I'm pretty sure you'll have to remove the
bumper and hinge out the radiator no matter what you do.

Watch out for faulty information in Bentley and several Internet sources
about 20 Nm torque on M6 bolts for the timing belt tensioners. You'll feel
the bolt stretching long before you get to 20 Nm. 10 Nm is the correct
torque for these bolts.

Paul
- no longer an S6 driver :(