Tom H Posted May 28, 2021 Share Posted May 28, 2021 Hi folks,I have recently acquired a new set of NGK B8ECS spark splugs as per the Caterham manual for this engine configuration. I have the spark plug gap of 0.025". My question is what torque to tighten the plugs to and should I use Copper Slip anti-seize in the installation? This will be first time I change them and would appreciate the feedback for a novice mechanic. Thx. Link to comment Share on other sites More sharing options...
Tazio Posted May 28, 2021 Share Posted May 28, 2021 Welcome, and remember we were all novice mechanics when we started. The Haynes Manual states that the torque wrench setting for the spark plugs is 22 - 28 lb ft. As for coppaslip, i've never bothered.Alan Link to comment Share on other sites More sharing options...
AnkerB-S Posted May 28, 2021 Share Posted May 28, 2021 22-29 ft lbs or 30-39 Nm. I have never applied any coating to spark plug threads. Link to comment Share on other sites More sharing options...
Tom H Posted May 28, 2021 Author Share Posted May 28, 2021 Many thanks! Link to comment Share on other sites More sharing options...
HendrixsWhiteStratReturns Posted May 28, 2021 Share Posted May 28, 2021 Hi TomWelcome - I have a 1990 1700 SS.On the recommendation of James Whiting (7 guru) I run NGK BPR6EIX's on my Xflow Supersprint. They're pre-gapped and superb, don't get the fouling issues that are common used with B8ECs Link to comment Share on other sites More sharing options...
7 wonders of the world Posted May 28, 2021 Share Posted May 28, 2021 For a full fat Crossflow NGK B8EV is a good choice of plug. Link to comment Share on other sites More sharing options...
timb2117 Posted May 29, 2021 Share Posted May 29, 2021 Sorry to be the naysayer, a friend who knows people who work on v8 supercars advises "anything with a torque setting needs lubricant or the setting wont be accurate" I do use copperslip on wheel nuts sparingly on spark plugs too. Link to comment Share on other sites More sharing options...
OldAndrewE Posted May 29, 2021 Share Posted May 29, 2021 In that case the torque needs to be specified with a lubricant (as ARP fasteners do). Most torques are specified dry as I recall. Link to comment Share on other sites More sharing options...
John Vine Posted May 29, 2021 Share Posted May 29, 2021 General torque chart here.Re the use of a lubricant or anti-seize compound, NGK say it's not necessary.JV Link to comment Share on other sites More sharing options...
ScottR400D Posted May 29, 2021 Share Posted May 29, 2021 Anything with a critical torque requirement would be specified as dry or with a recommended lubrication. Far more problems caused by lubricating, then over tightening because of that, than the other way around. Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted May 29, 2021 Share Posted May 29, 2021 Unless a specific lubricant is specified by the fastener manufacturer, always a clean dry thread for specified torque settings (rust or contamination mechanically removed, then thread cleaned with brake cleaner or a degreaser). Different lubricants vary massively in the friction coefficient applied at the fastener, so you can go anywhere from close to the same to double the strain in the bolt (and likely failure) depending on the lubricant, compared with torquing dry threads. Link to comment Share on other sites More sharing options...
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