In a message dated 98-05-26 11:55:40 EDT, raven@halcyon.com writes:

<<
 I've used W7DTC (not suppressed) plugs on my 87 for the last 30,000 miles.
 Maybe something fell into the combustion chamber when you were changing
plugs.

 Mark McCulley

 At 02:02 AM 5/26/98 EDT, you wrote:
 >In a message dated 98-05-24 03:34:34 EDT, pleolkes@arcom.com.au writes:
 >
 ><< I have just purchased some 3 pronged supressed Bosch plugs (part no.
 > W7RDTC) and put them in my '89 VAnagon engine. On turning the engine on
 > I heard a loud mettalic sound and became immediately concerned that the
 > the extra few millimetres that the plug protrudes into the combustion
 > chamber was too much and the electrode was coming in contact with the
 > piston. I turned the engine off and put my old plugs back in. I am not
 > sure what to do at this point.
 > I guess I am looking for some reassurance that the extra reach will not
 > make any difference. I realize that the thread length is the same and
 > the extra reach into the chamber is due to the larger size of the
 > electrode compared to the single pronged plug.
 > Could you please reply to my address and confirm that you have used
 > these plugs with no problems.
 > Thanks
 > Peter Leolkes
 > Adelaide
 > South Australia
 >
 > Modl6971 wrote:
 > >  >>
 >Peter, I have been putting the BOSCH W7DTC ( three prong) plugs in Vanagons
 >for 10 years now without ever experiencing what you have just mentioned. Do
 >your spark plugs show any signs of damage, such as a piston coming in
contact
 >with the spark plug?  Let me know.
 > Michael M. 87 syncro.  ( Running on three prong plugs, the only plugs I
would
 >use)
 > Also, the part number that you are including says W7RDTC, it should be
W7DTC.
 >
  >>