coolc7116 Posted October 17, 2007 Share Posted October 17, 2007 I took my 03 GS with 60k miles to a Toyota dealer to have my plugs changed, because it was more convenient. The service manager says that my car had Iridium plugs and I should wait to have them changed. Were iridium plugs standard on an '03? Or was the dealer afraid because it was a Lexus? They dont want to change the Serpentine belt, because they arent used to I-6 engines, but they did clean the fuel injectors and throttle body. Quote Link to comment Share on other sites More sharing options...
2JZTWIN TURBO Posted October 17, 2007 Share Posted October 17, 2007 Yes. The 2003 GS came with iridium plugs. Some models get them at 120k but for the GS its 60k. I don't know what kind of dealer can't change a belt. If they told me that I would be pretty scared to let them even change my oil. Quote Link to comment Share on other sites More sharing options...
gordonw Posted October 17, 2007 Share Posted October 17, 2007 The GS300 came with Iridium plugs in 2001. I can't remember the last time Toyota had an I6 engine. I can still remember the early Supras and the Cressida. Quote Link to comment Share on other sites More sharing options...
TRD911 Posted October 17, 2007 Share Posted October 17, 2007 Yes. The 2003 GS came with iridium plugs. Some models get them at 120k but for the GS its 60k. I don't know what kind of dealer can't change a belt. If they told me that I would be pretty scared to let them even change my oil. The I6 engine was put in the Supra and Cresida (I think).. Why would they be unfamilar with that. The iridium plugs should be good for 100K or more.. .. I would not let those monkeys work on my car. Same goes for the V8. That motor is basicly the same as the V8s they put in the FourRunners and Tundras.... B Quote Link to comment Share on other sites More sharing options...
2JZTWIN TURBO Posted October 17, 2007 Share Posted October 17, 2007 Lexus says to change the Iridium plugs on the GS and IS at 60,000 miles. They would probably be ok long after thet but I'm just tellin ya what they recommend. Quote Link to comment Share on other sites More sharing options...
dcfish Posted October 17, 2007 Share Posted October 17, 2007 Platinum plugs in the GS300 Quote Link to comment Share on other sites More sharing options...
dcfish Posted October 17, 2007 Share Posted October 17, 2007 Platinum plugs in the GS300 and Iridium in the 400.............. Quote Link to comment Share on other sites More sharing options...
gordonw Posted October 17, 2007 Share Posted October 17, 2007 Heres the page from a 2003 GS owners manual. GS_P267.pdf Quote Link to comment Share on other sites More sharing options...
2JZTWIN TURBO Posted October 17, 2007 Share Posted October 17, 2007 Yeah it says SK16R-P11 which is a #90919-01219 Iridium plug. Quote Link to comment Share on other sites More sharing options...
coolc7116 Posted October 18, 2007 Author Share Posted October 18, 2007 The manual also says the plugs need to be changed (even though they are iridium) to maintain the emissions control warranty. Does anybody have any idea why this requirement is only on the GS and IS? The emissions warranty only goes to 80k, right? Also, is it normal for a serpentine belt to need changing at 60-70k? It does look kinda worn. I used to have an ES and I didnt touch the serpentine until I changed the timing belt at 90k Quote Link to comment Share on other sites More sharing options...
Kevs98gs4 Posted October 18, 2007 Share Posted October 18, 2007 why don't you just upgrade to Tourque Master plugs and get more power. I gained 5 hp and 12tq on the dyno from just these plugs. I have a copy of the dyno if anyone wants to see it Quote Link to comment Share on other sites More sharing options...
z.Solo Posted November 1, 2007 Share Posted November 1, 2007 Heres the page from a 2003 GS owners manual. Hi gordonw, I wonder would it be possible to have access to your digital owners manual - my 03 GS300 I just bought was coming from Italy, and I don't understand Italian. Regards, z.Solo Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.