Peter. Like you I'm confused. Removed plugs, looked OK but decided to check to confirm right ones so went to NGK partfinder site and I find:-peter freeman wrote:Planning to replace the plugs just before the MOT ( first time I have done it on this engine ). I think the plugs are BCPR7ES but cannot find the info in the Haynes manual nor can I find any info re the gap which I assume is either 25 or 30 thou - can someone please confirm.
V6 EFi / Gasket Seat Plugs 87 –> 91 BCPR6E Gap 0.7mm
V6 EFi / Taper Seat Plugs 89 –> 95 BPR6EF Gap 1.0mm
FORD 2.9 SCORPIO SPARK PLUGS
12V 01/95 –> BPR6EF
24v SEFI (COSWORTH) 01/95 –> 06/98 PFR6B-11
Now, MB50 came to me with with BPR6EF plugs and looking into the plug holes they do seem to have tapered seats at the ends of the threads (albeit very narrow lands) so all OK, I think.
But, can anyone here say why there is such a big difference in the recommended plug gap setting between taper seat and gasket seat. If(?) plugs are identical in every other way but in their sealing method then it doesn't make sense, does it?
In passing, I note plugs for Scorpio (12V) are same as later Granada so that at least is consistent.