What is an Iridium plug?
What about iridium spark plugs? Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs feature a fine wire center electrode that is designed to conduct electrical energy better and increase firing efficiency.
How many spark plugs does a 2004 Toyota Sienna have?
First Set of Three Spark Plugs.
How much does it cost to change spark plugs on Toyota Sienna?
My local independent shop has priced the job at about $350-400 total. Dealer is about $200 higher last I checked. I’m DIY inclined but this looks like a job for the pros or advanced DIYer. Gen 2 Siennas have a recommended 120k mile change interval for the iridium tipped plugs I believe.
What’s the best way to start a Toyota Sienna?
The driver side plenum bolt took a bit more effort, as there is not enough space to reach it under the throttle body. But at least there is no pipe that blocks it. When putting it all back, it was helpful to start passenger side bolt first, then driver side plenum bolt and only then throttle body bolt.
Can you put a 14mm wrench over a passenger side spark plug?
There is just enough space between passenger side bolt and pipe to put 14mm wrench over it. You cannot remove this bolt and wrench once it is unscrewed, but it is not necessary. Just don’t forget to reverse wrench for screwing it in back while plenum is out of the way.
How do you change the spark plugs in a Toyota Sienna?
If you have trouble getting a bolt to unlock, use pliers on the Allen wrench. First, remove the bolt on the side, unclip the wiring, then gently pull the long tube out of the hole. There is a 5/8th-inch socket specifically designed for spark plugs. This socket has a rubber lining which allows gripping and gentle installation.
How do you change the battery in a Toyota Sienna?
While wearing gloves, use the 10-millimeter wrench to loosen the bolts on the battery. Carefully remove both sides and separate them from the battery, being extra careful not to touch both connections at the same time (otherwise you could get shocked). There should be a slight sizzling sound, which is okay.
What kind of wrench do you use to change spark plugs?
4- and 8-millimeter Allen wrenches 10-, 12- and 14-millimeter sockets (the 10-mm will be used most often) Rubber spark plug socket (5/8 inches) 12- and 14-millimeter ratchet wrenches (makes things easier…) Small ratchet with extensions Standard and needle-nose pliers Hat (your hair will be brushing against the vehicle a lot)
When should I change iridium spark plugs?
Replacement spark plugs should usually be the same type (platinum or iridium) as the original if they are expected to last 100,000 miles. Standard spark plugs are only good for about 40,000 miles. On some applications, a double-platinum or double-iridium spark plug may be recommended.
My local independent shop has priced the job at about $350-400 total. Dealer is about $200 higher last I checked. I’m DIY inclined but this looks like a job for the pros or advanced DIYer. Gen 2 Siennas have a recommended 120k mile change interval for the iridium tipped plugs I believe.
What kind of spark plug does Toyota use?
There are several types of spark plugs available through Toyota for your vehicle. Here’s the breakdown of each: The name explains the design of this plug — it uses a U-shaped groove in the ground electrode.
Why do Toyota spark plugs have an you shaped groove?
The name explains the design of this plug — it uses a U-shaped groove in the ground electrode. This u-groove traps the air/fuel mixture before the spark plug fires, making for a large spark, reducing fouling, and making for more efficient combustion. Available for select models, this design has several benefits:
The driver side plenum bolt took a bit more effort, as there is not enough space to reach it under the throttle body. But at least there is no pipe that blocks it. When putting it all back, it was helpful to start passenger side bolt first, then driver side plenum bolt and only then throttle body bolt.