Timing

[Kent McLean]

On 11/24/2010 06:48 PM, Grant Lenahan wrote:
> down on power, wont rev, pistons hitting valves (i guess it didnt jump THAT far).....
>
> the danger of not performing the H20 pump services is the obvious:
>
> 1. its easy now and will be hard later
> 2. a seizing water pump is probably the #1 reason timing belts break - taking your valves with you ( if you have an interference engine - i'm actually not sure)

A broken water pump *will* take out the timing belt, and the valves
*will* hit the pistons, and things *will not* be pretty.

The I-5 turbos are an interference fit. The water pumps do fail. The
list-recommended change interval is every other timing belt. I believe
the wisdom is the timing belt every 60K and the water pump at 120K.
But if you don't know, change the belt, the water pump and idler pulley.
If you want to go whole hog, add the crank and cam seals, too.

-- 
Kent McLean
1999 A4 Avant, V6 Tiptronic
1990 200 Avant mit V8 conversion
gone: 1990 V8 w/5-speed and other mods
gone: 1991 200 TQA #3, with mods
gone: '91 200 TQA x2, '94 100 S Avant, '89 200 TQ "Bad Puppy"