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Old 04-16-2011, 09:09 PM   #1
auxmike
 
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Changed my plugs after 38k (PICS)

Car left the factory with NGK, Toyota dealers sell DENSO replacements. Car seems to run a LOT better now. I don't care what they claim, I ain't leaving my plugs in for 100K.
NOTES:
1)The factory plugs I removed are covered with what appears to be sticky cosmoline on the threads, like the stuff they rub down old military rifles with! That's what it smells and looks like.... It's NOT motor oil.
2)There appears to be a "pad" attached to the inside of the hook part of the plug across from the iridium center electrode. Never seen that on any other plug before.
3)The iridium is like a pin tip, hard,brittle and delicate.
$38 shipped Priority mail from Covina Toyota in Cali via Ebay....
The pics are from a Blackberry, so please excuse the quality.
Attached Images
File Type: jpg IMG00263-20110416-1022.jpg (235.8 KB, 1067 views)
File Type: jpg IMG00265-20110416-1032.jpg (135.8 KB, 1068 views)
File Type: jpg IMG00261-20110415-1804.jpg (125.5 KB, 1087 views)
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Old 04-16-2011, 09:14 PM   #2
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Were they easy to change?
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Old 04-16-2011, 09:51 PM   #3
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You need a 10mm socket to remove the engine cover bolts (4) first.
Under there you will see the four coil packs that are held down by another four 10mm bolts. You would need to unplug the connectors first. After that the coil pack pulls out and the hole in the valve cover is exposed, that's where the plug is. A 5/8 spark plug deep socket is needed to get the plug out.
After installing the plugs, a torque wrench is required to properly tighten them.
To answer the question, no it's not hard to do IF you have the right tools and know how/confidence.
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Old 04-16-2011, 10:00 PM   #4
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Agree with 100,000 miles seems too much . I'll usually get the iridiums changed at 70,000 > 80,000 miles . Did so with a 2000 Corolla and the fuel economy got bumped up a bit . Think they were NGK . Let us know if you get any increase in gas mileage . Don't do plugs for aluminum blocks , the old cast iron yes . Thanks for the post .
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Old 04-16-2011, 10:21 PM   #5
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Did my 08 sedan (52k) two weeks ago and the plugs were identical save for the screws which only had black carbon looking build-up on the half closest to the tip.
Same result as you though- Much, much smoother ride and far better acceleration.
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Old 04-17-2011, 12:31 PM   #6
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Quote:
Originally Posted by daddyo View Post
Did my 08 sedan (52k) two weeks ago and the plugs were identical save for the screws which only had black carbon looking build-up on the half closest to the tip.
Same result as you though- Much, much smoother ride and far better acceleration.
Yeah, it DOES really make a difference! Worth doing...
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Old 05-04-2011, 04:02 PM   #7
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Yeah, it DOES really make a difference! Worth doing...
i achieved same results!
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Old 04-16-2011, 10:20 PM   #8
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Did you ever use CHEVRON Techron or SHELL V-Power for F.I. / fuel system cleaner before the change ? How did the plug for the #1 cylinder look ? Any different than the others ? All seem to be in same condition .

Last edited by Hershey; 04-16-2011 at 10:30 PM.
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Old 04-17-2011, 12:30 PM   #9
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Originally Posted by Hershey View Post
Did you ever use CHEVRON Techron or SHELL V-Power for F.I. / fuel system cleaner before the change ? How did the plug for the #1 cylinder look ? Any different than the others ? All seem to be in same condition .
Never used any Techron, etc. all the plugs look as pictured, the same.
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Old 04-16-2011, 10:57 PM   #10
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Make sure u guys check the spark plug gap still

by the way I think denso only last 30k miles vs ngk iridium 120k miles

Last edited by marcus; 04-16-2011 at 11:29 PM.
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Old 04-17-2011, 12:47 PM   #11
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Make sure u guys check the spark plug gap still

by the way I think denso only last 30k miles vs ngk iridium 120k miles
Not true.
DENSO sells two types of iridium plugs;

IK16 is the "regular" Iridium plug you're writing of.

SK16R11 is the "long life" Iridium OEM replacement part they market that the dealer sold me.
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Old 01-02-2019, 09:58 PM   #12
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Quote:
Originally Posted by auxmike View Post
Not true.
DENSO sells two types of iridium plugs;

IK16 is the "regular" Iridium plug you're writing of.

SK16R11 is the "long life" Iridium OEM replacement part they market that the dealer sold me.
Wrong answer. ik16 is the iridium "POWER" plug and the one you want.
The ik16tt is the standard iridium.
The sk16r11 is the iridium long life.







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Old 01-03-2019, 08:17 AM   #13
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Your 7 years late.
It's all in the timing,
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Old 04-17-2011, 03:29 AM   #14
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NGK sparks are way better than the Denso spark plugs, nice write up Aux, I changed mine when she had 25000, and again when she hit 50000, soon to be changed again lol
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Old 04-17-2011, 03:35 AM   #15
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What is the proper gap? I'm 95k miles on the OEM setup and need to start thinking about these things.
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Old 04-17-2011, 10:21 AM   #16
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What is the proper gap? I'm 95k miles on the OEM setup and need to start thinking about these things.
1-1.1 mm or .039-.043 inch
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Old 04-17-2011, 12:40 PM   #17
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Quote:
Originally Posted by big lo View Post
NGK sparks are way better than the Denso spark plugs, nice write up Aux, I changed mine when she had 25000, and again when she hit 50000, soon to be changed again lol
I did'nt choose either brand, I just ordered the dealer parts and a DENSO is what I found in the box.
NGK are all Japan made, DENSO are a mix of Japan/USA parts, see box pic...
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Old 04-18-2011, 04:38 PM   #18
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Quote:
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NGK sparks are way better than the Denso spark plugs,
Since you broached the subject, why is NGK better than Denso? In fact, I've always wondered why people say one company's plugs are better than another? To me, plugs are like rocks; very simple. They just consist of an electrode, insulator, and a gap.

I use standard resistor Densos in my 1988 Toyota Pickup. The truck has 180k miles on it and it is on its third set of plugs. The first set lasted 100k and the second set lasted 70k. SUre the gap was something like 0.125" but otherthan lower gas mileage, the truck ran fine with 100k mile plugs in it...

I usually run just Densos in my Toyotas because that is what usually comes in them (I believe Denso and Toyota are related somehow).
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