Advice from someone who just completed this DIY. (Heads up I didn't read every reply in this forum so some of this might have been addressed already.) I was only able to get one coil off without removing that rubber/plastic seal. My car is AWD, though that shouldn't make a difference in room between the engine and fenders. You do not need to remove the battery tray at the bottom, just the battery. A battery must of leaked once and the bolts on the tray were melted almost. Because my car was AWD the coil under the dip stick was kind hard to undo the bolt because the placement of the dipstick tube.

 

I just started my plug job on my '11 LS today and just removed all the crap. I'll start the plugs tomorrow. Here's a video which might be some help.

 

Sorry to raise up an old thread but I had to Thank the Helpful Folks that contributed to this thread (Especially Road Frog for starting this and Many other Helpful threads)!

I bought the factory plugs from our local Lexus dealership (wanted to avoid fakes and they actually had the best price around after discounting not having to pay for shipping) and did this job in around 2-2.5 hours without taking the battery out. I changed the rubber seals/gaskets/whatever that wrap around the coil too. The old ones were a little brittle and I also figured that I'd probably drop one or two while taking them out (which surprisingly didn't happen) but since I was in there already, it was money well spent.

Thanks again to all the contributors that posted up here. This forum ROCKS!!

 

I have tried for 2 days getting the plugs out anyone the exact measurements of extensions needed?

 

Not to be smart a$$, but this is a very basic job. If you are "2 Days" in and still can't get them, I would highly recommend taking to a shop. Otherwise, just go out and buy some misc extensions and swivels and try again. This took me maybe 2 hours and that was replacing the coil gaskets etc. Very simple job that some seem to want to make a major ordeal.

 

I agree that it wasn't that hard but it depends on your mechanical ability and comfort level to work on cars. I like working on our cars, so it went smoothly. The comfort level varies though. I thought that the rear plug on the passenger side was the toughest but I agree that it wasn't that bad. It took about the same (2-2.5 hours) and I also changed the plug hole gaskets too just because the rubber gets hard and wants to crack/split.

It's nice that the plugs come already gapped but I ran a feeler gauge through them anyway and surprisingly enough, they were all spot on the money.

 

Can we run ruthenium NGK spark plugs with .044 gap?

 

My 2010 has 48,800 miles mostly driven short distances. Would I benefit from changing the plugs or should I wait?

 

It would benefit from flush of coolant and brake fluid.

 

I think most people here would say that you can wait much longer. I changed mine after 150k and the car was still driving fine. I think most people are fine going at least 100k or more.
Congrats on having only 48k!

 

I got new radiator and actuator also new brake fluid.

 

I’m at 60k miles. Car runs fine. I feel like it’s not pushing as it used to when new. Would you guys recommend spark plugs changed this low of mileage. 2014 60k.

 

Did you clean the MAF sensors? They made some difference for me.

 

yes, that and throttle body cleaning always makes a difference.

spark plugs are 10 years old. Doesn’t know if it’s mileage or years criteria to change these.