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Discussion Starter · #1 ·
I was replacing the plugs in my 2012 LE 2.5L (107k) today and noticed a bit of oil in the #1 plug bore. All of the others were dry. So, new gaskets are probably in order. Anything special required to do the job? Some electrical connectors on top, might be part of the VVT system? I've done them other, but older, DOHC cars.

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Discussion Starter · #3 ·
Quite a few videos on YouTube showing how it's done. Toyota 4 cylinders are some of the easiest to work on.
So far, I've only found the older 2.4L engines.

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The 2AZ and 2AR aren't that different, if you took the engine covers off you would hard pressed to tell the difference. The layout of both engines are pretty similar. What goes for the 2AZ goes for the 2AR.
 

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Discussion Starter · #5 ·
The 2AZ and 2AR aren't that different, if you took the engine covers off you would hard pressed to tell the difference. The layout of both engines are pretty similar. What goes for the 2AZ goes for the 2AR.
True. My question pertains to the 4 electrical connectors, that aren't on the 2.4. Some connect to a solenoid or sensor. Do those need to come out before the cover comes off?

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Discussion Starter · #6 ·
The plug bore seals can be replaced without removing the valve cover. So, I replaced the #1 seal and we'll see what happens. I'm worried that it's leaking where the plug bore tube presses into the head. Which is harder to fix.

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The plug bore seals can be replaced without removing the valve cover. So, I replaced the #1 seal and we'll see what happens. I'm worried that it's leaking where the plug bore tube presses into the head. Which is harder to fix.

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How did that work out? I found the same issue on my 2011 when changing plugs. Just ordered new gaskets.
 

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Discussion Starter · #8 ·
How did that work out? I found the same issue on my 2011 when changing plugs. Just ordered new gaskets.
I looked after about 2 weeks and it was dry. I haven't looked since.

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