DIY Spark Plugs 04 GX 470
#106
Just bought a GX470 from the original owner with 216k miles. He had all the service records from the dealer (90 pages!), and I couldn't find any evidence of the plugs ever having been changed . So, I decided I better do it. I went with the NGK iridium IX which was ~$7 a plug. There are more expensive iridium plugs but who knows what the difference between "laser" and "IX" is. Everything went pretty smoothly. Only tip I have is it would probably be slightly easier with a cool engine...I was playing hot potato with the plugs and plug wrench lol!
#107
Just bought a GX470 from the original owner with 216k miles. He had all the service records from the dealer (90 pages!), and I couldn't find any evidence of the plugs ever having been changed . So, I decided I better do it. I went with the NGK iridium IX which was ~$7 a plug. There are more expensive iridium plugs but who knows what the difference between "laser" and "IX" is. Everything went pretty smoothly. Only tip I have is it would probably be slightly easier with a cool engine...I was playing hot potato with the plugs and plug wrench lol!
#109
Just replaced my plugs last night. Took me about 2.5 hours to complete. I took my time doing it and wasn't in any hurry. I cleaned up all the connectors and added dielectric grease for a nice, secure connection. The original plugs were NGK laser Iridium's. I replaced them withDenso SK20R11. When I first started up the car it started revving up high around 2.5k RPMs and started to fluctuate from low to high. I thought I broke something. Eventually it settled down around 1k. I took it for a little spin and it seemed a little peppier. I also cleaned out the throttle body while I had the intake off. One less task for me to complete.
#110
Nice write up - OEM plugs is the way to go (NGK/Denso)! Definitely do this on a cool engine, if the heads are hot, and the plug threads are softer, you run an increased risk of cross-threading them if inserted wrong.
#112
Spark Plug and Coil On Cyl 5 Looks Nasty
Hello All,
I have used this forum for several years but first time posting. First off thank you to all of the dedicated posters who have written DIY's! I finally got around to doing the spark plugs today and came across this coil pack and spark plug which are severely discolored. It seems like the plug may have been loose for quite a while. Should I change out the coil or try to clean it up and properly torque the new plug. The spark plug hole on #5 is also severely discolored.
Thanks for the input!
I have used this forum for several years but first time posting. First off thank you to all of the dedicated posters who have written DIY's! I finally got around to doing the spark plugs today and came across this coil pack and spark plug which are severely discolored. It seems like the plug may have been loose for quite a while. Should I change out the coil or try to clean it up and properly torque the new plug. The spark plug hole on #5 is also severely discolored.
Thanks for the input!
#113
If the threads are clean, I would go ahead and thread a new plug in there by hand until it bottoms out and is snug. Only then would I whip out the torque wrench.
If you aren't getting misfire codes set, you could keep using that coil pack. But I hate the sight of it and would replace it, personally.
Was the old plug wet with oil? If so, time to replace the spark plug tube seals and valve cover gaskets.
Chip H.
If you aren't getting misfire codes set, you could keep using that coil pack. But I hate the sight of it and would replace it, personally.
Was the old plug wet with oil? If so, time to replace the spark plug tube seals and valve cover gaskets.
Chip H.
#116
I'd maybe put that coilpack on a cylinder that's easy to reach, in the event it does cause misfire codes in the future so it's easy to swap out for a new one. With any luck you'll even notice a performance/economy increase with the sparkplug being tight in the head, lol.
#118
I was able to torque the spark plug to 17.5 Nm and cleaned up the coil pack as best as I could. Seems to run much smoother now. I always heard a slight tick and I'm wondering if that wasn't a tiny amount of compression blowing by the loose plug.
#119
Spark Plugs replaced - Window switches no longer working?
Hey All,
I replaced my spark plugs over the weekend using these instructions: https://www.clublexus.com/forums/gx-...-gx-470-a.html
Everything went smoothly but after putting everything back together and starting the car, the drivers side window switches aren't working. I can open my drivers side window and the sun roof seems to be working (although the auto open/stop isn't) but I cant operate any of the other 3 windows with the drivers side switches. Only the individual door switches for each window.
Anyone have an idea as to why this may have happened? I did leave the drivers side window down when I originally disconnected the battery to work on the car (to reach inside and grab tools etc.).
ALSO secondary note: I'm replacing my rear shocks soon. one of my rear height sensors is malfunctioning and I'm wondering if its worth replacing the sensor or just doing the coil conversion when I do the shocks? Lexus wants $700 to do the sensor. Thoughts?
Thanks.
I replaced my spark plugs over the weekend using these instructions: https://www.clublexus.com/forums/gx-...-gx-470-a.html
Everything went smoothly but after putting everything back together and starting the car, the drivers side window switches aren't working. I can open my drivers side window and the sun roof seems to be working (although the auto open/stop isn't) but I cant operate any of the other 3 windows with the drivers side switches. Only the individual door switches for each window.
Anyone have an idea as to why this may have happened? I did leave the drivers side window down when I originally disconnected the battery to work on the car (to reach inside and grab tools etc.).
ALSO secondary note: I'm replacing my rear shocks soon. one of my rear height sensors is malfunctioning and I'm wondering if its worth replacing the sensor or just doing the coil conversion when I do the shocks? Lexus wants $700 to do the sensor. Thoughts?
Thanks.
#120
Hey All,
I replaced my spark plugs over the weekend using these instructions: https://www.clublexus.com/forums/gx-...-gx-470-a.html
Everything went smoothly but after putting everything back together and starting the car, the drivers side window switches aren't working. I can open my drivers side window and the sun roof seems to be working (although the auto open/stop isn't) but I cant operate any of the other 3 windows with the drivers side switches. Only the individual door switches for each window.
Anyone have an idea as to why this may have happened? I did leave the drivers side window down when I originally disconnected the battery to work on the car (to reach inside and grab tools etc.).
ALSO secondary note: I'm replacing my rear shocks soon. one of my rear height sensors is malfunctioning and I'm wondering if its worth replacing the sensor or just doing the coil conversion when I do the shocks? Lexus wants $700 to do the sensor. Thoughts?
Thanks.
I replaced my spark plugs over the weekend using these instructions: https://www.clublexus.com/forums/gx-...-gx-470-a.html
Everything went smoothly but after putting everything back together and starting the car, the drivers side window switches aren't working. I can open my drivers side window and the sun roof seems to be working (although the auto open/stop isn't) but I cant operate any of the other 3 windows with the drivers side switches. Only the individual door switches for each window.
Anyone have an idea as to why this may have happened? I did leave the drivers side window down when I originally disconnected the battery to work on the car (to reach inside and grab tools etc.).
ALSO secondary note: I'm replacing my rear shocks soon. one of my rear height sensors is malfunctioning and I'm wondering if its worth replacing the sensor or just doing the coil conversion when I do the shocks? Lexus wants $700 to do the sensor. Thoughts?
Thanks.