Plugs Pleaze

[Arnulf]

Aluminium head means “soft threads” – “boppa” means stripped threads

Ah yes, I remember those. Turn with force, until thread strips, then quater a turn back , and hope nobody finds out
That was before I invested in a torque wrench.

[Duck Rogers]

What is the standard gap size, as supplied?

Anything from 0.0mm if they were bumped closed up to 1.5mm which probably wouldn’t spark.

Why grease?

Actually – not any grease – only copper slip or copper grease should be used.

These products are heat resistant, prevent metal migration and will alleviate the torque required to remove plugs.

Isn’t fasten the same as 'boppa', i.e. till the spanner don't turn no more, is a torque wrench essential?

Aluminium head means “soft threads” – “boppa” means stripped threads resulting in heli-coils having to be fitted by an engineering shop – expensive mistake.

27Nm will not strip the threads. However, with experience, 27Nm is not hard to feel – just enough to squash the compression washer.

Regards
John ZU-CIB

Agree on all points with John "who-once-was" Young.

Just a side note....if you don't have a torque wrench, tighten the plugs by hand until they are all the way in and "seated" and then use the plugspanner to tighten it further a little to between ¼ and ½ turn more. Yes, I know, it will feel as if it's not tight enough. Just leave it alone like that. They're tight enough and won't fall out and the threads won't be stripped either. :D

[Smiley]

Manne, you sounding like allot of boilemakers here....

"The spark gap can be anything between 0 and 1 meter.....


The official spark gap is 0.45mm

[John Young]

"The spark gap can be anything between 0 and 1 meter.....

Hi Smiley,

I can assure you that with the voltage and amperage that we are talking about, you will get the same "spark result" at both "0 and 1 metre" meaning ...

No spark at all

Regards
John ZU-CIB

[Smiley]

No spark at all

Switch on your mags.......

[Smiley]

No spark at all

Switch on your mags.......