I have an XF Sportbrake 30t (X260) with the 2.0 turbo charged Ingenium engine. I was doing a routine spark plug change and noted two things;
1) The workshop manual says the spark plug gap should be 0.7mm - 0.8mm but the gap on the ones I took out and the brand new NGK replacements was set at 0.6mm. I stuck with the NGK factory setting as that matched the original factory fitted item but is this correct. Any advice?
2) The factory fit NGKs have T on the top of the connector that is supposed to be in line with the injector +/- 45 deg when torqued, Internet research indicates that manufacturing tolerances meant not all plugs would match all cylinder head threads to get the exact fit so the factory had a large set of plugs and if plug A didn't comply when torqued then they tried plug B and so on. Sounds a very expensive, very time consuming and very unlikely manufacturing process to me. How critical is this and if so how do you do get the plug in with the correct torque at the correct angle without a large stock of alternative plugs and a neck like a giraffe so you can see down to plug No 4?

BTW you need a .magnetic14mm spark plug tool with a swivel connector on top to reach No. 4 plug,

Thanks, Chris