Pain in the rear spark plug change

[NuclearN8]

Are these the same size on 2004 (4th Gen) 4.7L V8?

Ironically, I just asked this question before finding this thread

I have two V6's so I can't confirm but I have no idea why they wouldn't be...
side note: lowes and home depot didn't have these near me. I got my 10.9's in the above size from the local Ace hardware for $.65/ea.

 

[DiskDoctr]

I have two V6's so I can't confirm but I have no idea why they wouldn't be...
side note: lowes and home depot didn't have these near me. I got my 10.9's in the above size from the local Ace hardware for $.65/ea.

Maybe I can confirm that by removing one if I find one that has a decent head (read: can be reinstalled and removed again without much risk).

Thanks.

 

[NuclearN8]

Maybe I can confirm that by removing one if I find one that has a decent head (read: can be reinstalled and removed again without much risk).

Thanks.

If the ignition coil p/n's are the same, then the odds are in your favor the bolts are the same which hold them to the engine... good luck.

 

[toyo]

I have never removed an ignition coil on a Toyota engine that uses different size bolts for this. The 1.6, 1.8, 2.4, 3.0, 3.4, 4.0, 4.3, 4.7 and the 5.7 all use this size.

 

[DiskDoctr]

Excellent! Thanks guys!

 

[AJColorado]

where are you getting the part #'s from
id like to order some new bolts as well for other things


ty

Internet searches and cross references. Let me find the sites again and I'll post them.

Here's where I found them.

http://www.toyotapartszone.com/Page...1=1GRFE;4=SR5)&sectionID=1&componentsID=19-01

 

[JimKW]

I just did the plugs on my V8 today and had the same rust problem. Not as bad as OP, but getting those little bolts out was the hardest part of the job. I used a 6 point socket and had to tap the socket on with a hammer on all but the #8 plug. No way to get the socket on that one and tap it. Somehow I managed to get them all out and reused the after cleaning them up.

Loosening the wires on the coils was also a pain. Was really worried I was going to ruin one of the wiring sockets. Job took me just about 4 hours for what should have been 1-2 hours at most. Mine has 139k and not sure if they were original plugs or not. They really didn't look bad at all.

 

[toyo]

I just did the plugs on my V8 today and had the same rust problem. Not as bad as OP, but getting those little bolts out was the hardest part of the job. I used a 6 point socket and had to tap the socket on with a hammer on all but the #8 plug. No way to get the socket on that one and tap it. Somehow I managed to get them all out and reused the after cleaning them up.

Loosening the wires on the coils was also a pain. Was really worried I was going to ruin one of the wiring sockets. Job took me just about 4 hours for what should have been 1-2 hours at most. Mine has 139k and not sure if they were original plugs or not. They really didn't look bad at all.

I am always in fear of breaking the plastic clip on the connector going to the coil. I have learned a great way of getting them to release. Fords are notorious for breaking.
If you look at the tips of plugs you just removed and see the letters P and D on them they are original. Passenger side will have P, Drivers will have D. However.....I just replaced mine that had the original and both sides had P stamped on them. I do know they were original.

 

[JimKW]

Every one of mine had a 'P' also. I thought I saw on the Maint schedule for an 03 that it called for them being changed at 60k. So not sure if they had been changed before or not. Like I said they didn't look bad at all, so I doubt they had close to 140K on them.

 

[toyo]

Only the plugs from the factory will have any markings on them.

 

[2014 Warthog]

You guys are lucky to even be able to get at your plugs :/

Was looking at my 2014 the other day with it's Ca smog stuff on it. I can only get to 2 plugs without what looks like some major top end disassembly.

 

[cgv69]

M6-1.00 x 25mm flange bolts

Is it safe to replace these with SS bolts?

 

[NuclearN8]

I see no reason why not... class 10.9 flange bolts.. I used a dab of anti-seize on the threads and then wiped some silicone lubricant on the exposed head once it was installed. done.

 

[nasdamus]

Sorry to bump an old thread, but i was looking for the bolts and couldn't find the part number anywhere. In case anyone else comes across this wondering, the toyota part number is 90105-A0103.

 

[KaseyMcc]

My 183,900 mile spark plug change...

Hey guys, I saw this thread and thought I'd add my experience yesterday when changing my spark plugs for the first time since I've owned it (just under 10,000 miles since I bought it 8 months ago). I'm running a 2004 SR5 with the 2UZ-FE.
About half of my coil pack bolts were heavily corroded just like some of the other posters in this thread, so I wondered if the plugs had ever been replaced. Well, the Denso Iridium Long Life plugs that I pulled out all had the letter "P" on the tip--from what I've read on this forum that is an indication that these were the original plugs from the factory! That's nearly 184,000 miles! I'm definitely impressed by the quality and durability of Denso spark plugs. The plugs really didn't look too bad, but had a bit of oil on a few.
I was expecting the coil pack bolts to break off, but had doused them in penetrating lube earlier in the day so they came out just fine. A few of the plugs weren't very tight either, definitely not what I was expecting--I expected they would be pretty hard to get out and worried about breaking them too, but they worked out alright.
I replaced all the coil pack bolts, and the new plugs are Denso Iridium TT 4702. Torqued plugs and coil pack bolts to 13 ft/lbs, no anti-seize.
I can say with certainty that it starts faster, idles smoother, has better throttle response and acceleration and will probably result in better mileage too but I've only driven it about 10 miles since I changed them last night so I'll post back on any mileage increase. I tend to drive pretty conservatively to get better gas mileage, so I was already managing around 18-19mpg (on paper) ((yes, you would be pissed if you got behind me at a stop light)), but I'm hoping there will be an appreciable increase in my mileage...maybe I can drive like I'm 28, rather than 68.
Overall, I took my sweet time on this job, probably around 6 hours total. I'd never done a spark plug change on a newer vehicle so I wanted to be extra careful...especially considering the appearance of my coil pack bolts--did NOT want anything snapping off because my T4R is my daily driver. I cleaned the coil packs up with MAF sensor cleaner, then put a light coat of lithium grease around the inside lip of the connectors to help seal out moisture and make them easier to pull off next time. Also made sure to put each coil pack back into the same cylinder it came out of...didn't know if that was necessary but I didn't want to take any chances, just in case. I considered ohm testing each coil pack but couldn't find what range they should be operating in so I will put that on hold--but haven't had any codes or misfires so I assume my coil packs are just fine for now.

Sorry for the long post, I'll get my pictures up now!