RE: Bosch Spark Plugs

[Todd Phenneger <phen9461@uidaho.edu>]

------------------------------

It seems to me that once the three metal things are no longer curved at
the end to follow curve of electrode, and once the electrode is more of a
triangle shape then round, it is time to replace them. Seems to happen
around 40,000 miles or so depending on the motor.  Once electrode is
triangulated the gap will be different anyways hence they run worse.  OR
at least thats my opinion on the matter. 
	I replaced mine a few weeks ago due to a hesitation under full
throttle going up hills, esp in hotter weather.  I replaced the plugs and
it runs great now.  Changed Cap and Rotor at this time too.  They are not
too expensive and Cap contacts are usually pretty well grooved by this
time.  
	Hope this helps
Todd Phenneger

Hairy green toads from Mars made River6822@aol.com say:
> Thank You for the info but, how do I tell when these plugs need to be
> replaced. I just got the car and the plugs and wires appear to be fairly
new.
> I would normally just check the gap, if good I would use them until they
went
> out of spec or appeared really dirty.

Just use them until 50K or so, or when they look no longer usable.
They pretty much run until they don't any more :-)

- --                                                                           

	Todd Phenneger
	1984 4000s quattro / modified/ awaiting Turbo Transplant.
	1985 4000 quattro / Silver / Fixing it Up.
	1987 4000cs quattro / Saphire Metallic Blue/ Girlfriend's
	1996 A6q / Volcano / Dads Car
   *****1985 5kt / PARTING OUT!