Ignition Coils?

First of all, Thanks for all the info you share. I've been a peeping Tom on the site for a few years and finally decided to get inside the window.
Doing some PM at 269K on my prerunner 4.0. Along with several other items I'm changing the plugs for the second time. First time around I used the original ignition coils. Should I change them out this time or wait and change them as they falter?

 

Well change them if you get a code for them, if they go bad they will cause a blown head gasket.

 

An ignition coil causing a blown head?

 

Yup causes misfiring happened to me before on my 05, kept driving it.

 

I think the blown head probably caused the misfire. Not a coil causing the blown head.

 

Never have i heard of a bad coil blowing a head gasket

 

The misfire causes hot spots which leads to blowing the head gasket. Thats what my mechanic told me.

 

Sounds like you need a new mechanic

 

Welcome. For $80-$120, it could be peace of mind for another 270k..

Edit: Guess I was off base a bit, looks around $360 for 6 Denso 673-1308 off Amazon. I went 351k miles in my 07 4.0 Tacoma and never needed to change a coil, like others have said, wait til you throw a code to replace.

 

As Bebop said you need a new mechanic. That one is an idiot.

 

How often should the ignition coils be changed? The manual doesn’t speak to them as far as I can tell.

 

You change them when they throw a related code.

 

when they stop working, you replace them

195k miles and running strong with factory original spark plugs and still getting 420 miles per tank

 

I’ll prolly replace them at 200k, right now just under 130k. The Denso ones are about $80 each so I better start saving my pennies, lol

 

I wonder if there are any cross compatible coils. For example, back in the day my Focus required some pricey coils, I found I could use another Ford coil, can't remember the model of car but it was a direct fit.

 

A guy on here went 400k miles with hardly any maintenance done.
I am at 195k miles with not much done.

Go change your coils, plugs, antifreeze, diff fluid, trans oil, blinker relays, starter, water pump, alt, belts, u joints, brakes, hoses, brake fluid, freon, winter air, big boy pants and what ever else you can change at every oil change.


I change nothing until its broken and have money in the bank along with a lot of free time on my hands.

 

Like others said, the coils are not a regular service item. Run them until one fails or you get a related code. If you are concerned about failure, you could buy a new one and keep it in the truck so you have a replacement ready if/when one fails. But then, they all could last another 200k.

 

I learned early in the mil the value of having spares. Totally agree.

 

I've taken all your advice, I carry a spare in the box with my OBDII reader,, THANKS!

 

What is the part # on the Denso ignition coils for the 2012 Taco with 4.0L? My search on toyotapartsdeal.com came up with 2 different part #'s.