Some correction/clarification is in order here.

First of all, the part numbers for the correct tri-electrode Bosch plugs for
a Vanagon are W7DTC or WR7DTC - not W7TDC as erroneously mentioned in the
below post. (Note letter reversal.)  The only difference between the W7 and
the WR7 is that the latter adds a resistor to prevent radio interference
from your engine electrical system.  That is the one that we stock, for
$3.75 each.  (If purchased as part of a $50+ order, you get an additional 5%
listmember discount on request.)  Incidentally, Joel is correct that these
are for all watercooled Vanagons (except diesel of course) - not just '85.

If you want the stock, single-electrode Bosch plugs (basically equivalent to
the W7CC0 that came factory-installed), that's the W7CC, and they run $1.25
each. These are the plugs that we include with our tune-up kits, and are
what the vast majority of Vanagon owners buy.

There is also a Platinum Plug, the 4233, for $2.49 each, but for my money if
I were going to upgrade over  the stock plugs I'd jump right to the
tri-electrode WR7DTC's.

- Ron Salmon
  The Bus Depot, Inc.
  www.busdepot.com
  (215) 234-VWVW

> the Bosch W7CC0 and Beru 14L-7CU/14L-7C are
> the recommended ones in the owners manuals.  However
> the W7 is the ticket ... that's the Bosch heat range, so
> you're ok with those triple-prong plugs. i've been running them
> for about five years and love 'em.
>
> > After speaking with Bus Boys, I was informed that the 3-prongers
> > are for '85 only? Is this right?
> Bullshit. W7 are for any bus that needs that heat range, and that's
> any watercooled bus.  i KNOW the 86-91's require the W7 range, and i
> think the 83-85 watercools do as well.
>
> my advice: replace it with more Bosch W7TDC. that's the only plug i
> buy nowadays. i can't prove it, but my overall mpg has gone up 1.0 mpg
> since i put them in.