New Spark Plugs
![Image](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2-V_nC4vb-iW4i5ElbX99PhqYKpLtWAvfWNYkAgj-BasHNFOQRf_r4ivY60HYtRJcWUQiAiBF3n7ogexDhSEdp3ACz-Ww0d9cNDNSA9z6jpx9Hd8Kqk0eyft_hG4u5wagRCDZuLWrouGHqCDC9cTJXzf_hctC1dZ799934PbrA7lI__k1v5WrJtwI-g/w400-h354/Newplugs.jpg)
As I've now done nearly 4,000 miles I'm taking the precaution of changing the spark plugs. The service schedule says every 2 years, but I want to upgrade from the standard plugs. Caterham do a set of NGK Iridium plugs that are used in the race engines. I picked them up direct from the Dartford factory. Probably my last time there before they move to the new place down the road ! To change the plugs you first need to remove the cover plate. On mine this is held in place with 4 x 10mm nuts. Removing it reveals the ignition leads. I replaced one at a time, just to be sure, but each cable is a specific length for the cylinder. The lead simply pulls off the head of the plug, and then you need a 16mm spark plug socket on an extension to get down to the plugs themselves. The new plugs need to be torqued very low, between 10 ~ 15 lbft according to the NGK spec. I didn't change the gap spacing. Looking at the old spark plugs they seem to have a very healthy brown-tan colour on the