Geezabloke Posted June 21, 2005 Share Posted June 21, 2005 Im running Denso Iridium plugs in my BPU+ Supe. From a service perspective, how often should these be changed? Dave Link to comment Share on other sites More sharing options...
Geezabloke Posted June 24, 2005 Author Share Posted June 24, 2005 Come on you lot........ Someone should know? Dave Link to comment Share on other sites More sharing options...
Alex Posted June 24, 2005 Share Posted June 24, 2005 Think the slowness in answering is cause it has been covered before.... Their life expectancy is at least 20,000miles. Assuming all else is well. Link to comment Share on other sites More sharing options...
Geezabloke Posted June 24, 2005 Author Share Posted June 24, 2005 Think the slowness in answering is cause it has been covered before.... Their life expectancy is at least 20,000miles. Assuming all else is well. THANK YOU Link to comment Share on other sites More sharing options...
merckx Posted June 24, 2005 Share Posted June 24, 2005 And the fact knowone really knows. Don't think anyone has any real technical knowledge on the subject to make definite recommendations. I would probably change them every 8k miles to be safe but it depends on how you drive the car really. Link to comment Share on other sites More sharing options...
Alex Posted June 24, 2005 Share Posted June 24, 2005 6k for NGK coppers Iridiums say on the back 60,000KM's I believe...I'd not push it that far but 20kmiles seems possible as I did that Link to comment Share on other sites More sharing options...
Geezabloke Posted June 24, 2005 Author Share Posted June 24, 2005 Was really to get an idea of when? as a routine mainrtenance swap rather than wait till theres a problem. Thanks for the input guys.. Dave Link to comment Share on other sites More sharing options...
normore1 Posted June 24, 2005 Share Posted June 24, 2005 Iridiums are supposed to be good for 100K miles in most new vehicles. The Supra at BPU however is far from typical and harder on plugs. I have pulled my IK22's out after 15K miles and they still look good with no signs of any deterioration. I would use the following criteria for replacing: 1) pull them out about once every 10K miles, do a visual inspection and measure the gap. If there are no obvious signs of wear or deposits build up and the gap is +/- 0.05mm (5%) of the original gap then put them back in and keep running. 2) if the car starts running bad at idle or develops a high speed miss, pull them out check the above and replace them if they look bad. Replace them anyway if you can't solve the rough idle or miss. Link to comment Share on other sites More sharing options...
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