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Removal and replacement of spark plugs

Tiny
GWENDA CHASON
  • MEMBER
  • 2004 LEXUS RX 300
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 65,500 MILES
Hi, you very kindly replied to my original question regarding the above procedure. I followed your instructions&drawing, removed the engine cover & found&removed the front 3 spark plugs. But I was completely stumped as to how&where I could find the rear 3 spark plugs. There was an aluminium tube above the area with a pipline secured by a union on the r/h side of the tube. Do I have to remove these items toi get to the rear spark plugs? Would appreciate your expetise on how to continue. Best wishes, Gwenda.
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Tuesday, March 23rd, 2010 AT 6:13 AM

15 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
I will forward your post to Merlin2021, he is the original moderator you were working with.
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Tuesday, March 23rd, 2010 AT 7:33 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Can you upload a picture for me? On the back side, go to Lexus and buy the tune up kit, you need to remove the surge tank...on American cars it's known as the upper intake...


https://www.2carpros.com/forum/automotive_pictures/62217_1_70.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_2_57.jpg

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Tuesday, March 23rd, 2010 AT 12:45 PM
Tiny
GWENDA CHASON
  • MEMBER
  • 3 POSTS
  • 2004 LEXUS RX 300
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 62,500 MILES
Hi, could you please inform me how to change the spark plugs on my V6 engine. A drawing of how to find them would be very helpful. Many Thanks.
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
This engine has coil on plug ignition, so each cylinder has a coil on top of the sprak plug, the small screw in each COP is removed(loosened) and the COP is lifted, then using a 16mm socket the plug is removed, new plug(gapped to 1.0mm) is the inserted into the cylinder and tightened. COP is then placed on the plug and the screw retighted. Repeat this for all 6 plugs, reinstall engine cover and you are done.


https://www.2carpros.com/forum/automotive_pictures/62217_cover_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_engineplugs_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_specs_7.jpg

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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
DRBETS2004
  • MEMBER
  • 1 POST
  • 2002 LEXUS RX 300
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 93,000 MILES
How often should I change lexus rx300 spark plugs?
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
According to Lexus 120K miles here is a guide that will walk you through changing them and the plug part numbers as well

Recommended Spark Plugs
DENSO .................... SK20R11
NGK .................... IFR6A11

https://www.2carpros.com/articles/how-to-change-spark-plugs

.Please let us know if you need anything else to get the problem fixed
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
MKW
  • MEMBER
  • 1 POST
  • 2000 LEXUS RX 300
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
How much should it cost to replace the spark plugs?
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
It varies with location. It can be $70.00-$130.00 and hour. It usually takes 2 and a half hours.
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
KHUSAINOVRUSLAN
  • MEMBER
  • 3 POSTS
  • 1999 LEXUS RX 300
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 134,000 MILES
What spark plugs should I get for my lexus rx300 1999
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
As far as brand name, I would use only NGK for that vehicle. The parts store will give you the correct application for your vehicle.
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Nippondenso (ND) is the other recommended brand.
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I agree with Nippos but I just don't find them as readily available as the NGK.
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
KHUSAINOVRUSLAN
  • MEMBER
  • 3 POSTS
Thank you for your help. Another thing is like NGK has platinum, iridium and other plugs, manual says use just iridium plugs, does it really matter?
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Yes, use what the manufacturer used when it was built.
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)
Tiny
KHUSAINOVRUSLAN
  • MEMBER
  • 3 POSTS
Thank you.
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Wednesday, January 16th, 2019 AT 6:56 PM (Merged)

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