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Made it through 4 pages without a torque spec for plugs mentioned.
Could Someone please lmk, thanks.
Per the factory service manual spark plug torque is 13 ft/lbs (18 N.m) and the coil to cylinder head is 69 in/lbs (8 N.m). As mentioned, good luck getting a torque wrench on the back bank.
I've got a 2003 Highlander Ltd gas-only 3.0L V6 (engine# 1MZ-FE), 174k miles; and a 2009 Highlander Hybrid 3.3L V6 (eng# 3MZ-FE), 160k miles. i recently did plugs on each vehicle for the first time. thank you all for advice, pics, etc. i posted both my projects in the ToyotaNation.com forums. i found i had to remove the intake manifold on both vehicles (and the wiper/cowl box on the '09). there are many posts on people's experience doing the rear-bank on the toyota V6's in their various generations (3.0L - 3.3L - 3.5L - etc) and vehicles (Highlander, Sienna, Tacoma, etc). it seems the ability to reach the rear-bank without manifold removal really depends on the specific vehicle model and engine generation. my local dealer quoted ~&550 for each vehicle, so i saved ~$1,000 by DIY after buying 12 Denso Iridiums.
please reference my posts on ToyotaNation forum:
"DIY 1MZ-FE V6 3.0 '03 Highlander Spark Plug Replacement"
"DIY 3MZ-FE '09 Highlander Hybrid Spark Plug Replacement"
both of these also include links/references to other very helpful write-ups/tips on this tiresome job.
front bank plugs @13ft/lbs translated into hand-tight then 1/3 turn w wrench - that's how i torqued the rear plugs.
and those blind-removal backside bolts? - what a PITA! not to mention how many different sizes people seem to find. would've been nice and easy if they were hex-socket heads.
Great post, and very thorough. Just purchased my first Lexus. Funny thing is even though it's a 2002 RX300 and 23 years old, it's the nicest vehicle I have ever owned. LOL. Anyways, I'll be retiring soon and plan to make this vehicle my daily driver/overlander and project vehicle. You know mid-life type thing. So I'm thinking about purchasing a HAYNES service manual to handle the small maintainence stuff. But aside from the usual Youtube videos, forums, etc.., are there any other means you can think of that can assist me on my Lexus journey?
Use the "search this forum" page at the top of the RX300 home page and you'll be able to find just about anything you want to know. Congrats on your new ride.
02-05-18, 12:06 AM
