Spark Plug Replacement

[andy b]

the MPS6 plugs are only replaced at 100,000kms. I assume this to be the real gen but would like confirmation.

I thought it was every 70,000km as per service schedule?

[rd415]

MPS6 Manual has tightening Torque of 10 to 24 nm

Tightening torque 10-14 N·m - this spec was cut and pasted straight out of MPS3 manual

Conclusion - THEY AIN'T TIGHT

I used to demo to students in 3rd year the effects of even slightly overtightening spark plugs on an oscilloscope, (part of training to read oscilloscopes) quite amazing the variation in spark line with different students tightening carefully gapped spark plugs. Around 5kv difference in the spark lines is normal overtightened plugs only slightly it's much higher.

For the layman the spark line is a series of lines (one for each cylinder) on the oscilloscope that shows the voltage required to jump the plug gap. It is almost impossible to get exactly the same KV on each plug

[bd581]

Can somebody explain whe the post describing the incorrect way to tighten spark plugs was deleted making a lot of the comments made make very little sence for people using this information it the future?