MaveriK Posted November 13, 2006 Share Posted November 13, 2006 My sparks are just a little on the wet side (over fueling which is being corrected wednesday by Turbofit) but someone said that they had heard that if the plugs had been wet and then cleaned with a steel brush they lose their ability to clean themselves. Is this true or just hog wash?? Quote Link to comment Share on other sites More sharing options...
Kranz Posted November 13, 2006 Share Posted November 13, 2006 The real problem is that the wire brush leaves metal particles (and possibly pieces of wire) on the plug's ceramic surface and in between the body and the ceramic insulator that can lead to the spark tracking across the insulator to earth. Sand blasting is better, however the sand can get trapped in between the body and the ceramic insulator, releasing when the engine runs! Which ever way you clean them be sure to clean it after with a tiff paint brush and solvent, and blow out with high pressure air (with eye protection of course). Iridiums have a very fine central electrode, and wire brushing or sand blasting may damage it. They should be self cleaning anyway??? Quote Link to comment Share on other sites More sharing options...
Jake Posted November 13, 2006 Share Posted November 13, 2006 Yes they're most likely buggered if somebody has wire-brushed your iridium plugs. I'd just replace them with some good old NGK copper ones (BCPR7ES for example) Quote Link to comment Share on other sites More sharing options...
_Rob_ Posted November 13, 2006 Share Posted November 13, 2006 Yes they're most likely buggered if somebody has wire-brushed your iridium plugs. I'd just replace them with some good old NGK copper ones (BCPR7ES for example) Are stock plugs platinum? therefore coppers wont be best suited? Quote Link to comment Share on other sites More sharing options...
MaveriK Posted November 13, 2006 Author Share Posted November 13, 2006 Arse, they were brand stinking new!! :( Quote Link to comment Share on other sites More sharing options...
Kranz Posted November 13, 2006 Share Posted November 13, 2006 Give them a good scrub with solvent & a thick bristle paint brush & blow dry wih compressed air. Quote Link to comment Share on other sites More sharing options...
Jake Posted November 13, 2006 Share Posted November 13, 2006 Are stock plugs platinum? therefore coppers wont be best suited? Yes, I think the stock were platinum. Copper ones are fine. 90% of us use them. Even in single turbo Supras. Quote Link to comment Share on other sites More sharing options...
supRo Posted November 13, 2006 Share Posted November 13, 2006 Stock plugs are platinum and suppose to last ages. Copper equivalent plugs are fine but need more frequent changes. In my personal opinion I have found Iridiums to be a bit more responsive in performance compared to the copper equivalents. However I feel that the Iridiums do go down in performance after about 11-12 thousand miles (I've had 5 sets in my car). I'm sticking to Iridiums as I'm happy with them but they are expensive compared to the coppers especially of their longevity Quote Link to comment Share on other sites More sharing options...
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