CIS Help Needed.......loooong reply

[cobram at juno.com]

Kent McLean <kentmclean at mindspring.com> writes:

> the engine in an expensive way.  Hydrolock occurs when a
> liquid is pulled into the cylinder on the downstroke of the
> piston (for example, when you drive into a deep puddle and
> the intake is low enough, or the spray full and high enough,
> for the intake to ingest the water). When the piston tries
> to compress that fluid, it can't and rods bend or blocks
> get holes. Since it is not your job to educate the dealer,
> avoid them.

Well, sometimes.  Most of the hydrolocking I've come across on Audi's has
been gasoline hydrolocking, there are various scenarios which will fill
the cylinder(s) with raw fuel when the engine is off, on startup gasoline
compresses about as well as water.  On the non-CIS Audi's, especially the
V8Q, a defective Fuel Pressure Regulator is usually the culprit for
engine hydrolock, usually no internal damage, just an "Alfred E Neuman"
flywheel. (missing teeth)   
The weakest link will usually be the one to give first, can't say I've
ever seen it blow out a cylinder and cause a hole in the block.
 
BCNU,
http://www.geocities.com/cobramsri/
Health is merely the slowest possible rate at which one can die.