itsmike177

iTrader: (3)

Hello All,

Approaching 60k miles and was wondering if anyone has changed out their spark plugs on an ISF? And any difficulties with the bird nest of wires in the engine bay?

Thanks for anyone's input

IS350atWOT

iTrader: (1)

I too am wondering this. I did a search and this thread came up. Anyone?

staman

iTrader: (1)

I had my plugs swapped out and it's not easy. My mechanic took about 1.5 hours to get them changed and he wasn't ******* it either. Its quite a bit more involved than i originally thought....

Rash

iTrader: (1)

Can't help on that, but there are DIYs for both IS350 and IS250. I'm posting this just to get you the idea.

darbs242

iTrader: (5)

It's a pain, took me two hours

lobuxracer

iTrader: (2)

I'll be posting this with the valve lash inspection. Plugs and valve lash come due at the same time...

Parts are on order so I won't be without a car waiting for some o-ring to show up.

Joe Z

iTrader: (10)

^ Thanks Lance!!!!

OEM Spark Plug Part number is: 90919-01249
Seems to be widely used in the Lexus line up.. and a bit pricey!!

Denso listed Part Number is: FK20HBR11

How do you feel about the coil packs life cycle?

I'm still about 6-8 months away before I need to change the plugs...


~ Joe Z

Fapout

iTrader: (6)

I'm approaching 60k and need to do this soon as well.

MRxSLAYx

Ive changed my plugs about 5 times, and its not really that difficult. I have noticed a positive difference in idle and WOT performance with new plugs, so I would definitely recommend changing if its time.

anxiouz

iTrader: (9)

" not really that difficult" and 1.5+ hour job don't equate in my opinion. Gapping and swapping plugs in most cars takes like 15 minutes.

lobuxracer

iTrader: (2)

Nobody gaps plugs for a street car anymore. They come gapped at the factory, and the electrodes are way too fine to gap yourself without special tools. Just don't drop them on the electrode end or you're hosed.

anxiouz

iTrader: (9)

What?! Not at all in my experience. They may come gapped from the factory but we always rechecked/set our own on my Evos. They may be close but we always preferred to recheck and confirm our exact measurements ourselves. On at least 3/4 of the time we had to adjust.

lobuxracer

iTrader: (2)

You're not going to gap a plug with two 0.4mm electrodes and a feeler gauge (or wire). You'll bend it well before you even get a chance to check it. I've also checked a lot of ND and NGK plugs - it's extremely rare they are even slightly off unless they've been mishandled or the thread sleeve is missing from the box.

Mitch08ISF

iTrader: (8)

I just had mine done last month a the Lexus dealer they only charged 170 and stuck with the quote, but they said it would be more next time. I think to get a loaner car and have it on record is worth anything under 250 for it.

itsmike177

iTrader: (3)

Original poster here, glad to see that someone found this thread and reopened it.
I have been putting off the spark plug replacement since August as I am just about to reach 60k miles in February 2012. Reading the spark plug replacements DIY's for the IS250/350 and looking in the ISF engine bay, the procedure looks about the same.

Will take pictures and post if others haven't already by then.