Spark plug gap

Technical Area Engine, Transmission, Exhaust etc
2

Good day all

 

I have a 2008 MK3 Sport and would like to change the plugs 

 

I have purchased the correct NGK plugs but cannot find any information on how much the spark plug gap should be.

 

Would appreciate any comments on where I could obtain this information.

 

My local Mazda dealer said for me to bring it to them and they would change the plugs for £99.00.Mazda UK head office and technical department simply said contact your local dealer.

 

 

 

 

3

The NGK spark plug website will tell you the gap. But new NGK plugs are pre set correctly ready to install.

4

1.3mm is the setting (OK, the specification section of the handbook says 1.25 to 1.35 mm).  I put a set of NGK Iridiums in my NC recently.  Two were spot on 1.3 but had to adjust a couple as they were not quite right ‘out of the box’.  Interestingly the 40,000 mile plugs I removed were still at 1.3mm but being a bit ‘old school’ I still was happier changing after that mileage.

Take care not to overtighten the new plugs.

JS