2005 Toyota Sienna Spark Plug Wiring Diagram

George likes to do his have maintenance on his vans and trucks. Occasionally, he makes gormandise out of wood.

It's Gotta Be Done

Toyota recommends the replacement of spark plugs, typically when your vehicle reaches 120,000 miles. This routine upkee can be very costly. The dealer I talked with proposed $900 for the job, which seemed unreasonable for a set of cheap spark plugs. Let's look through the work that is compulsory, and you dismiss arrive at the decision yourself whether to do information technology yourself.

Since I have done this already myself, this article should serve as a helpful guide for those of you in the same predicament. There really isn't any need to disassemble a banging part of what's under the hood. I adjudicate to show how to get the spark plugs replaced with the least total of make required. I estimate it bequeath take deuce to four hours, but you need a long strive and strong, nimble fingers.

What Do I Need?

• 4- and 8-millimetre Allen wrenches
• 10-, 12- and 14-millimeter sockets (the 10-mm will be used most often)
• Rubber spark cud socket (5/8 inches)
• 10-millimeter wrench
• 12- and 14-millimeter rachet wrenches (makes things easier...)
• Dinky ratchet with extensions
• Flexible ratchet
• Gloves
• Standard and needle-nuzzle pliers

Optional

• Paper towels
• Flathead screwdriver
• Duster
• Electric tape
• Hat (your pilus wish comprise brushing against the vehicle a lot)
• Towel (to cover the parts that you will be lying on)

First Disconnect the Shelling

While wearing gloves, use the 10-mm wring out to loosen the bolts on the battery. Carefully bump off both sides and separate them from the battery, beingness extra conscientious non to touch both connections at the same time (otherwise you could get shocked). In that location should be a slight sizzling sound, which is okay.

Place a towel over the assault and battery area, operating room otherwise, make sure the area is safe for working. There wish be slews of metre spent leaning over this area, soh make sure it's set up in a way that is safe.

First Set of Three Spark Plugs

The spark plugs are stock split into two sections, three in the front and three in the back. The frontal tercet plugs can be replaced in about 15 transactions, but be prepared to set aside an additional two to quaternary hours for the rear three plugs.

Remove the Cover

Catch the smaller Allen wrick and unlock the three bolts along the front of the frame. Once you unlock them, IT should be fairly quick. If you accept trouble acquiring a bolt to unlock, use pliers along the Allen wrench.

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Change the Plug

First, remove the bolt along the side, unclip the wiring, then lightly pull the endless electron tube out of the hole.

There is a 5/8th-inch socket specifically studied for spark plugs. This socket has a rubber lining which allows gripping and gentle facility. Join this to a ratchet with a durable extension, on with the socket, and unscrew the sparking plug from the hole. Once it is pulled out, lay out the late spark connect the socket and gently screw the new one into its place.

Supplant the Other Two Frontmost Electric discharge Plugs

Repeat these steps to replace the remaining two front spark plugs. Connected the three rear plugs, the method will be the same, merely with less room. Happening the rear plugs, atomic number 102 detaching of the wire assembly should be necessary (as they made the cables long enough to draw in the spark plug tube out without detaching the wiring).

Remove the First of Three Items

To bother the rear touch of plugs, you will have to come away three items. The first and simplest is the pose of cables above the exhaust manifold, simply above the new spark off plugs. IT's in the way and will need to be moved. Only three 10-millimeter bolts, a cable, and a a couple of pipes need to be detached and moved. Disassemble so that this part can be touched over the front spark plugs, kayoed of the right smart, but on that point is no need to learn anything out of the hood nonetheless.

Begin Removing the Exhaust Multiple

Antitrust to continue in this incision, remove the four bolts that require an 8-millimeter Allen wrench. Nary need for any extravagant tools here. Once the dash is unlatched, it can atomic number 4 removed by hand. After removing the quatern bolts, bump off the two 12-millimeter bolts on from each one side, and then remove the metal framing. Take this piece of framework retired of the hood and set it down for reassembly by and by. Unfortunately, this is only the beginning of getting that exhaust manifold off.

Remove Token 2 of 3: The Air Separate out Unit

Move by removing just the tubes and bolts so you can pull out the air filter unit. It's fairly uncomplicated. There are two runty 10-mm bolts and several tubes to disconnect. Pulling the large subway off the exhaust manifold on the right should take a trifle force, only you can easily reassemble it later. Place this piece outside the exhaust hood, next to the railway locomotive traverse and exhaust manifold bracket taken unstylish earlier. This is the last piece that will be pulled exterior completely.

Remove Particular 3 of 3

The challenge with removing the exhaust manifold is that IT is bolted on with trey brackets in the back that you bequeath need to gravel. See the depiction below. The first bracket is not at all flexible and has a 14-millimeter bolt. The other deuce are 12 millimeters and can personify removed using special tools. The short 12- and 14-millimetre ratchet wrenches are perfect for squeezing in and getting those come out where on that point is little room to go by. A great deal of force is needed, indeed it mightiness pee-pee sense to assumed long sleeves before reaching into the back.

Remove the Manifold

Proceed in removing the manifold. On that point are two pipes engaged to the aluminum part on the right which will spit out a pocketable antifreeze. Not much will come forward, but be aware when removing those pipes. Attempt to pull out the big piece as one and disconnection any lines that are attached. It may help to use colored tape to identify which pipe goes to which, merely mine were, fortunately, color-coded already. You whitethorn need to use needle-wind pliers to gently move out the older pipes that are sealed.

Commute the Spark Plugs! (Finally)

The method is the same, simply this time the cables are longer (as antecedently mentioned), and the wiring doesn't have to be disordered. Unbolt the spark plug tubes and proceed to replace the spark plugs. The stretched ratchet dow will be same helpful in this case. I found that separating the ratchet from the reference helped me fit it in; then I would Re-attach IT when unscrewing the spark plug.

Reassemble

Now that the spark plugs are replaced, reassemble everything. Getting those three bolts back on may very well be as difficult as taking them off, and took me about the same amount of time. Once they are back on, the rest should go off somewhat promptly.

IMPORTANT: Make a point that every tobacco pipe and wire connection is double-chequered, and that all air is connected thoroughly and routed to the correct place. These connections are critically important and could mean serious damage to the vehicle if not correctly assembled.

Clean IT

There is an option to clean the pieces as you reassemble. Might as well, as these pieces are vacant and easy to access.

Turn back Your Work

As with any service maintenance, commencement up the car and let it sit idle for a bit. Some would propose taking it for a breakable drive to make a point the "fit engine" light doesn't draw close (which would suggest a pipe Oregon conducting wire assembly was non replace in the right place). Subsequently a little of testing, the car should be ready for use.

I did notice that the front line spark plugs appeared to personify under more stress than the rears (arsenic shown), which may excuse why some suggest changing the fronts periodically. This would certainly be easier than changing altogether the plugs.

Hope this helps in your project. I bid you the best!

This article is accurate and true to the best of the source's knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or vocation advice in business, financial, licit, or technical matters.

Source: https://axleaddict.com/auto-repair/How-to-change-the-spark-plugs-in-your-2004-2005-2006-2007-2008-Toyota-Sienna-step-by-step

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