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3rd Generation (2005-2012) Specific discussion of the third generation Toyota Avalon

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Old 06-09-2008, 11:29 AM   #1 (permalink)
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Spark Plugs for Avalon 2007

Does anyone know where the location of the Spark Plugs for Avalon 2007 is? I am not able to find it in the engine. Also the user manual also does not show it.

The mileage in my car is about 30,000. I tried to do it myself to save $$$ from the dealer. When I check the Dealer coupon for 30K, it does not mention that the Dealer service will replace the spark plugs. Should I just replace it? Sorry, I am not too knowledable with car.

Any feedbacks are greatly appreciated!

Thanks,
Franky
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Old 06-09-2008, 04:32 PM   #2 (permalink)
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Spark plug swap isn't due until 100,000 miles.
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Old 06-10-2008, 03:15 PM   #3 (permalink)
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There's a large silver colored engine cover on top of the motor. Plastic piece. It's affixed in 3places. It pulls off.

Once off, you'll have access to the 3 front plugs and the 3 rear plugs after you remove some hardware at the rear of the motor.

Book calls for changing plugs in this motor at 120K.
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Old 06-22-2008, 02:41 AM   #4 (permalink)
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Yep, manual says 100k miles. My 05 has ~50k miles and is still going strong on the original plugs.
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Old 06-22-2008, 07:31 AM   #5 (permalink)
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i'm sorry to say it, but if you can't find the spark plugs....you probably shouldn't be trying to replace them. like the others said...they are good for 100k or more. this will give you time to go buy a manual and start studying.
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Old 02-03-2009, 10:46 AM   #6 (permalink)
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anybody has a drawing of the manifold removal for replacement of the rear spark plugs. Thank you.
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Old 02-03-2009, 07:51 PM   #7 (permalink)
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Yeah, these iridium plugs are good for 100k miles. I replace them at 60k, they are typically fine, but I enjoy doing preventative maint. I have had no probs at all with the NGK IX plugs.
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Old 02-03-2009, 09:44 PM   #8 (permalink)
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was there any problems to get to the rear plugs and do you have any pictures of removal rear manifold. Thank you.
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Old 02-03-2009, 10:20 PM   #9 (permalink)
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I haven't had to change my Avalon's spark plugs yet, I have 58,000 mi on mine. I have changed the plugs on my Camry and IS300.

With the Avalon, you have to pull off the silver engine cover, then remove the intake air surge tank (upper air intake plenum) and then remove the ignition coils on each cylinder. I would suggest buying a new intake plenum gasket (OEM list price is under $10).

I can post pics of the service manual pages.
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Old 02-03-2009, 10:47 PM   #10 (permalink)
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(1) Remove the silver engine cover.
(2) Remove the intake air surge tank.
(3) Remove the ignition coils
(4) Using a 16 mm plug wrench, remove the spark plugs.
(5) Install the spark plugs to each ignition coil, and connect the ignition coil connectors.
(6) Install the intake air surge tank (torque specs in last pic).
(7) Install engine cover.







intake surge tank torque specs.

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Old 02-03-2009, 10:58 PM   #11 (permalink)
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In the first picture, 11.a. "disconnect water by-pass hoses from throttle body"

When you disconnect the hoses, coolant will come out. You have a few options to deal with this.

-you can drain the engine coolant prior to doing the job.
or
-you can clamp the hoses shut, until you start putting everything together.
or
-you can clamp the appropriate sized bolt inside the hose to plug it off, until you start putting it all back together.

If I feel like changing the coolant, I will drain and refill. Normally I just plug the hoses off with the right sized bolt while I do the job.


Let me know if you need more info. That should get you through the job.
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Old 02-04-2009, 09:39 AM   #12 (permalink)
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thank you very much will definitely order gasket
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