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Posted

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.

Posted

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.

Posted

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.

Posted
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

Posted

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

Posted

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

  • 2 weeks later...
Posted
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

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