plug differences (Bosch)

[MrK]

I remember reading somewhere on this board that Bosch W8LCR and RW8LC are different plugs, even though at the Bosch service center I visited they seemed to think that the latter was just a renaming of the former, both being the same exact plug.

If they ARE different, how are they different?

I ask because I'm running RW8LC's and they're fouling like anything.

[Jand3rson]

I wasn't even aware there was a RW8LC. That's strange, it's just a rearranging of W8LCR. Bosch USA's website doesn't even show that part number.

I searched for 1989 BMW 325i, and W8LCR's come up, but not what you listed.

[MrK]

Oops! My bad...

It's supposed to read WR8LC and W8LCR. You'll find that both of those bosch plugs exist.

[MrK]

Ok I found some info while surfing... WR8LC is the supposed 'updated' version of the W8LCR. BUT, the 8LC has a .8mm gap while the LCR has a .7

Does a bigger gap than OEM make starts harder? And how about cold idle?