Quote:
Originally Posted by Rsnail
I bought 6 spark plugs from Champion, platinum ones and they have a 0.8mm electrode gap. Is that fine for a KV6? Haynes says 1mm but I've read some shortened the gap to 0.5mm and it supposedly cured their slight misfiring issues, and not only for one of them, read a lot of cases, what do you guys think?
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1.0 mm is the correct gap for the KV6. Reducing it has been done on the 4 cylinder engine but not, to my knowledge, on the KV6. After all, it's not an easy job extracting the plugs from the RH bank. I have never had any trouble with sparking plug gaps in fifteen years of ownership.
As for it doing no harm, I recently had trouble starting my SD1 V8 from cold with terrible misfiring. I found the cause to be an incorrect plug gap on no.8. It was too small!
Once enlarged to the specified size the engine started beautifully. So on that basis I'd say that your plug gaps definitely need to be 1.0 mm and no smaller.
Simon