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Old Jul 20, 2015 | 11:09 PM
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JEFASOLD
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Default Re: When to replace spark plugs?

Originally Posted by GraphiteGhost
Dave, great expectation! I would suggest they do not put anything on the plugs, as they slap them together day and night on an assembly line. If involves an added cost in time/manpower/materials, they will most likely nix it. Another consideration, they make monies repairing the heads when the plugs 'rip out' and break/strip during repairs (back end costs customers incur). And, come on, we do all own a benz/Chrysler red-headed stepchild... I especially like your idea of getting In there and taking them out and putting something on the threads as a preventive measure.


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If it is an SRT6 engine from AMG, they are assembled by a single technician and may well have something on them. I went to colder plugs after all the engine mods at about 40K and had no difficulty with removal.
 
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