SNiiP3R

iTrader: (3)

Has anyone replaced theirs yet? How difficult was it to get to them ? Do you have to take anything off, like an intake ?

Thanks in advance

ARISTOh

iTrader: (3)

I waited past 60k to change mine... plug in cylinder 1 exploded and damaged my motor. 1 brand new head & shortblock later I'm here to say... get it done. It's not hard.

jdmshawn11

i did mine 2 weeks ago, i do not need to take off anything if i remember correctly. it took me 30 mins.

praetor

Did they fix it under warranty? Iridium plugs should last at least 90K miles.

bclexus

The Iridium spark plugs will last over 200k miles with no diminish in fuel mileage or performance.

Replacing the spark plugs at 60k miles is 'Required under the terms of the Emission Control Warranty'. Therefore, if you are not concerned with voiding the Emission Control Warranty, then there is no need to replace the spark plugs. I personally would not replace the spark plugs.

dchar

But if there was some kind of premature deterioration, manufacturing defect, or installation issue and it caused engine damage like ARISTOh experienced, then you'd be glad you still have that warranty, right?

praetor

The warranty mentioned above has to do with the emission systems and not power train. So if you fail your emissions test, then Lexus fixes your crap for free.

bclexus

Engine damage caused by a [young or old] spark plug? That would be extremely rare indeed...

I have never heard of a spark plug exploding and damaging the engine as ARISTOh experienced. Have you?

Even dedicated race engines with minimal clearances in the cylinders, very high compression, intense pressures and heat, and extreme rpm do not have physical spark plug failures...

Think about it - billions of miles are driven every single day without a spark plug physically damaging the engine.

dchar

I see...but wouldn't you also void your Powertrain Warranty (72 months/70K miles) too if you don't perform the spark plug replacement at the indicated interval?

It may be rare, but a possibility...definitely wouldn't want to pay for those repairs out of pocket.

bclexus

The answer is - no...

praetor

It is my understanding the two are separate. In this day and age, changing spark plugs at 60K is ridiculous. I've also had a spark plug blow on my old Camry going 55+MPH. Besides running a tad rough, I was able to limp it home and replace the bad plug. But people will always argue the better to be safe than sorry strategy so to each his own.

uncle

This is absolutely a coil problem,

The original dealer proved that, but failed to replace the bad coil, and changed the failed part (plug) that was sympathetic to the coil. In turn the spark plugs are continually damaged. Buy an OBDII Code Reader, and the next time this happens, identify the bad cylinder and replace the coil. Check the plug, it may have been damaged also, but it is the coil. It is not: the injector, not a vacuum leak, not the plug, not the harness or any of the other things identified in these post. It is the coil.

zychek789

I will replace the #1 cylinder coil and spark plug . I finally found a blown DTC fuse under the dashboard that restored the operation of my OBDII Code Reader. The prior record keeping may be in error. You don't know unless you do it yourself. The air intake assembly is not that easy to remove , but I am getting good at it. Thank You "UNCLE" for your reply.

2GR

The worst spark plugs are from Ford. Breaks in half when you remove them!

bclexus

I didn't know Ford made spark plugs - never seen or heard of the brand.