2008 Corolla Spark Plugs

2008 Toyota Corolla Spark Plugs:

BOSCH 9600 OE Fine Wire Double Iridium; 0.043" Gap -- Comes pre-gapped.
Available at RockAuto.com

 

The Denso 3324 is the OEM spark plug. Get them, and you won't have to worry about them again for a long time. Production quality is no different between the dealer plugs and the "aftermarket" versions

NGK is also good, but they are a bit more expensive. If you use the NGK's, get the Laser Iridium.

Buy them from Rock Auto for the best price.

 

DENSO OEM dealer here is $18 each for my HiHy. NGK iridium tipped that easily runs 100 000 miles is $7 each parts store. I used NGK for years without any issues.
So my question is - why bother with DENSO?
Also, none of my business of course, but why do you run 91 octane on a car that is made for 87? It's your car, of course.

When it comes to the opposite—using a higher octane fuel than recommended—the risk of danger is lower. The general consensus is that using premium gas when your car can run on regular gas doesn’t deliver any extra benefits when it comes to engine life, fuel economy or reduced emissions. So save your money and fill up with regular gas.

 

I am confused about the octane rating as on the bottom of page 81 of the PDF (or page 289 of the paperback):

https://justgivemethedamnmanual.com/manuals/2008_toyota_corolla.pdf

It states the following:

’08 Corolla_U (L/O 0706)
289
2008 COROLLA from Aug. ’07 Prod. (OM12B28U)

Fuel type:

Unleaded gasoline, Octane Rating 87
(Research Octane Number 91) or higher
Fuel tank capacity, L (gal., Imp. gal.):
50 (13.2, 11.0)



You are in USA maybe NGK spark plugs here in Canada might be more expensive, I don't know as I have not called around. Thank you.

Sidney
E-mail: sidneybek(at)yahoo.com
Dartmouth, Nova Scotia
Canada

2008 Toyota Corolla model: CE with 1.8L and 5 speed manual with 207 700 KM (made in Ontario, Canada in 2007)

 

Then reesearching octane differences is surely beneficial.
But this is what I observe existentially. They surely want to confuse you and doop into spending more money on more expensive but useless petrol.
So unless it CLEARLY states that higher octane is REQUIRED, like it is on GDI engines due to much higher compression ratio - then you are simply making them richer with your money and at no benefit to your vehicle.
I spoke. This debate will surely get heated as opinions on octane use are as profound as on oil, filter and plugs.

 

Ignore the "Research Octane Number".
The octane numbers on the fuel pumps at gas stations are "Motor Octane Numbers", which are the only octane numbers that you are concerned with.
Your car's Owner's Manual calls for 87 Octane fuel. That's the one to use.
Using fuel at 91 Octane (pump number) will provide NO benefit -- and since the higher octane fuel burns slower, your engine's valves will become carbon-fouled much more readily.
Paying premium fuel prices when your vehicle doesn't require premium fuel is a REALLY bad idea.

 

NEVER use Bosch ignition parts in a Toyota.

The correct plug for your car
http://www.globaldenso.com/en/products/aftermarket/plug/topics/2007/05_2.html
SC20HR11
90919-01253

Beware they are many fake plugs out there even at places like Amazon.

 

NEVER use Bosch ignition parts in a Toyota.

What he said! Bosch spark plugs are for Volkswagen vehicles.....

Spark plug inquiries can be confusing. Everyone seems to have a different plug that works well for them....similar to oil threads. To each their own....

The easiest thing to do is to remove 1 of your plugs , see what it is and buy the very same plug. If those are OEM iridium plugs , they are good for 192,000 km's and more. Some only change them at 250,000 km's and the engine still works good. Check your owners manual and it will show you an option for both NGK or Denso. Both very good quality iridium plugs, either will work well. Again, replace what you currently have ....

You don't need to run high octane fuel, it's a money scam. There "are" more cleaners in high octane fuel and that helps with running cleaner ,but use 87 octane and throw in a bottle of seafoam once or twice a year...

PS....It's amazing that Rock Auto can ship plugs to Canada for half the price of buying them locally!! Check them out....good luck

 

Spark Plugs

I'm surprised at the lack of knowledge expressed here in regards to spark plugs in general, and BOSCH spark plugs in particular -- some say "Bosch is for Volkswagens!"; some say "Bosch is for European vehicles!"; Some say "Densos only !"; Some say "Pay more and get the NGKs!" -- but nobody mentions the statistics that tell us that neither Denso nor NGK currently produces a DOUBLE IRIDIUM ( Iridium on both electrodes ), as does BOSCH.
Yes DENSO makes a fine spark plug -- I have used them in my Toyotas for hundreds of thousands of miles with no spark plug issues of any kind.
I have used NGKs as well, on one of my Toyotas and several dirt bikes. Likewise, no problems.

Yes there are a ton of opinions, based almost entirely on anecdotal "evidence" -- but where do we see evidence that a spark plug knows what make of engine that it is screwed into !??? HHMMMMM !?? Face it, there is NONE !!

What matters TO ME is the design and construction of the spark plug, which includes the type of center electrode, the type of ground electrode, the material used in the surfaces of the electrodes, the design of the firing tip's so-called "flame travel" (aka "kernel"), Insulator design and materials, the method of "sealing" the insulator to the plug body, and the type of plating (or lack of it) used on the plug's threads to prevent plug "seizure".

Comparing those factors, I find that the BOSCH Double Iridium meets ALL of those requirements, but neither the NGK nor the Denso plugs do so.

HOWEVER, you are all free to believe whatever hype you care to swallow, and run whatever plugs you think are "best".

Personally, I run BOSCH Double Iridiums in our '99 Land Cruiser V-8 and in our Modified 6-cylinder Toyota (Shaved Head, Port-Matched intake & exhaust, Electronic ignition, 6-into-1 Header, Offenhauser Dual-Port intake, Holley 4-bbl., Open Exhaust, 4-Speed with Hone Overdrive) FJ-40 -- as well as in our Mercury 4.6-litre V-8. They perform very well in all 3 vehicles, and have been long-lasting and trouble-free for over 400,000 miles (combined).

 

Are Bosch' excellent Platinum Ir Fusion spark plugs discontinued? Mine are still great with well over 100,000 miles on them now in my super-modded 1ZZ-FE with total of 210,000 miles.

https://www.boschautoparts.com/en/auto/spark-plugs


At $5.34 each, Denso Iridium TT made in Japan is absolutely your best choice. http://densott.com/

http://www.rockauto.com/en/catalog/toyota,2004,corolla,1.8l+l4,1432915,ignition,spark+plug,7212

 

At $5.34 each, Denso Iridium TT made in Japan is absolutely your best choice. http://densott.com/

http://www.rockauto.com/en/catalog/toyota,2004,corolla,1.8l+l4,1432915,ignition,spark+plug,7212

I've run them in my Fj62 for close to 10 years. Still doing fine.:grin:

 

Run the 4701 plugs, you'll probably never have to change them again, they darn well last 150K miles (300,000 KM roughly).
http://www.rav4world.com/forums/99-...32-anyone-want-see-what-v6-spark-plugs-look-like-after-115-000-miles-pic-3.html

 

That Bosch double iridium pin to pin plug looks pretty good on paper. I know the Bosch platinum surface gap style plugs DO NOT play well with most Asian ignition systems for some reason. They misfired in my 7A-FE distributor system, in my mothers Mazda's waste spark, and my friends Mitsubishi waste spark system as well. In my 7A-FE they misfired after about a week, they went a little longer in the other cars but still failed to run properly prematurely.

 

You'd think a company like Bosch could make a reliable plug(given the lack of moving parts). But I too have had a number of bad Bosch plugs. I will never use them again.

 

Yea that Bosch looks attractive if the rest of the plug is built well. I don't know why the old Bosch platinum plugs always ran bad in Asian cars.

 

 

Beats me how ANY spark plug knows what country the engine came from.
I'm thinking that the person installing the plugs selected the wrong plug for his/her particular engine.
Experienced mechanics know that there is ALWAYS some monkey that wants to experiment with different heat ranges and/or plug reaches, thinking that they will improve performance -- then when it all goes to hell, they blame the plug manufacturer.

A couple of years ago, I was travelling in Idaho (speed limit=80) and got a "Check Engine" light.
My Actron OBD II scanner showed a misfire in #7 cylinder.
Pulled the plugs (Bosch), and they looked "bad" after only 40,000 miles. I had expected 100,000 miles, so I was pretty jacked at the plug failure !!
The mechanic was a young fellow, who said he had a lot of trouble with Bosch plugs in the same 4.6 liter FOMOCO engine.
He installed a set of Densos (at $7.60 each), which got me another 1,200 miles to get back home.
After arriving back home and investigating the situation, I discovered that I had ordered the WRONG part number for my application !!
Stupid mistake on MY part -- not a reflection on the Bosch plugs at all !
I yanked the Densos, and replaced 'em with Bosch plugs of the correct type and part number (Bosch 9605, Double Iridium). No more problems !!
Kept the Densos for spares -- ya never know !:>)
I don't have anything against Densos or NGKs, but I run a lot of Bosch parts on my '95 Mercury Grand Marquis Restoration -- Fuel Pump, In-Tank-Screen, Fuel Injectors, Plugs, Ignition Wires, Alternator, and Starter.
I use the Bosch fuel and ignition parts on the FOMOCO engine because FOMOCO uses an ignition/fuel-management system that was designed by Bosch -- similar to that used on Porche and Audi, and shared with a couple of million Ford Crown Vics, Mercury Grand Marquis, and Lincoln Town Cars.
The Bosch Fuel/Ignition system has proven to be extremely reliable over the decades, for domestic cars and Ford trucks used in fleet and police vehicles.
I don't tell others what they should buy or do -- I just tell 'em WHAT I DO, and WHY.

 

I've found Bosch to be hit or miss. I had a Bosch water pump go bad in less than a year(about 4 years back). I had Bosch plugs foul multiple times in my Rx7. Installed NGK without issues for years. And they were the correct type plug in both cases.

Truth is, in all my years of being a mechanic, I've had plenty of Bosch failures and Zero Denso/NGK failures. I think the Bosch OEM stuff is very good, but find their aftermarket stuff falls short. As for Denso, I find little to no difference between their OEM and aftermarket lines, as they're both top tier.

:smile:

 

Lots of very cool and extremely beautiful sights in Japan -- was there (courtesy of USNavy) back in 1956.
Mount Fuji is beautiful all year 'round -- as are the Japanese women !!
I wasn't paying much attention to their spark plugs :>)

 

The Iridium TT has a Platinum ground pin, not titanium. The TT Platinum has a titanium ground protrusion.

 

I wonder what Sydney decided to buy?.... Hopefully not Bosch!

 

I did not get a chance to remove a spark plug to examine condition and make & model of spark plug. From all of the reading I used to do for over 10 years on Toyota 4-Runner/pickup dedicated discussion sites (Toyota Nation and about 4 others) I learned that for a Toyota vehicle Denso and NGK were the best tune up parts specially spark plugs. So if or when I need spark plugs I will buy Denso and probably the Iridium TT which as people have stated here they are the exact ones in my car (1ZZFE engine).

Toyota # 90080-91184 (Denso SK16R11 Iridium)) is $14.95+tax at my local dealership and most dealerships in Canada

but I will buy Denso Iridium as it seems to be the best quality according to Rock Auto's info chart:

http://www.rockauto.com/en/moreinfo.php?pk=222818&cc=1432915&jsn=36

Just not sure which grade of Iridium I should buy?:

Denso # 3324=Iridium Long Life= Gap 0.044=CarQuest (local auto parts store)=Cannot get it
Denso # 4701=Iridium TT= Gap 0.040=CarQuest=$12.25+tax (15% HST local tax)
Denso # 5303=Iridium Power= Gap 0.044=CarQuest=$12.25+tax

To buy from Rock Auto there is a 25% or so exchange rate on USD to CDN Dollar as well Credit Cards charge 1.5% or so on top then $8.50 handling fee (used to be $5 ) and US Mail about $8-9 from Rock Auto. Again I have to see if my spark plugs are bad.

Keep the opinions coming, thank you.

Sidney
E-mail: sidneybek(at)yahoo.com
Dartmouth, Nova Scotia
Canada

2008 Toyota Corolla model: CE with 1.8L and 5 speed manual with 207 700 KM (made in Ontario, Canada in 2007)

 

See if you can find the 4701 locally at a retail parts store. I found them for the same price+shipping as Rock Auto at a retail chain autoparts store near me.

 

I'd stick with the OEM plug - Denso 3324. It's what Toyota's engineers call for. You can save a few bucks at Amazon Canada: https://www.amazon.ca/Denso-SK16R11...=UTF8&n=6948389011&newVehicle=1&s=automotive&vehicleId=1&vehicleType=automotive

 

The 4701 is a better plug for barely any more money.

 

The gap's too small. It'll detonate early.

 

No it won't, spark fires at the same time regardless and the difference in gap is 1/10th of a milimeter. A slightly smaller gap is fine since the spark is better exposed. The lower firing voltage needed to cross that gap is good since it'll stress the ignition system less. Detonation would maybe be a heat range issue, and the 4701 is the correct heat range for a 1ZZ-FE. Gap distance difference so small won't make a lick of difference, if anything they might wear out to .044 inch gap at the end of life in 150,000 miles. Anyway, the spec for gap is.....drumroll please....

Gap 1.0 - 1.3 mm (0.039 - 0.051 in)

So the 4701 is in spec, at the smaller end, which means as they wear away they'll still be in tolerance. I bet you could leave them in for 200,000 miles and when they come out they'd be in spec under 0.051 gap but pretty worn out looking. I know on my 2ZZ I noted a HUGE difference from 30K mile Iridium IX plugs and the Denso Iridium TT plugs, the idle was incredibly smooth with the new plugs and the engine felt a good deal smoother over all when driving.

 

All of your Iridium plug options are already discussed in the maintenance thread:

http://www.toyotanation.com/forum/1...official-ultimate-2003-2008-corolla-matrix-pontiac-vibe-maintenance-thread.html

The OEM installed 3324/SK20R11 Iridium Life are rated at 120K miles and shown to go much longer on a 1ZZFE with minimum gap increases. Also OEM are the NGK Laser Iridium 4996/IFR5A11/IFR5T11 which also show minimum gap increase at the OEM interval and are OEM on many 2000's era + Honda models.

The Iridium TT (4701) is the OEM plug on most newer Toyotas, especially those with Direct Injection. It has a slightly reduced interval (100K) but it's smaller starting gap likely means you will be able to go much similar mileage as the above listed plugs with similar results.

Personally, I use the Iridium TT in everything I service now. It's well priced, widely available, has all good reviews, and lasts 100K miles.

 

DI engines are tougher on spark plugs, so 100K in a DI is like 150-200K in a gentle PFI 1ZZ.

 

You're ok with either one... I usually do NGK on all my cars, and wait for the 20% off sale at either Canadian Tire or Parts Source (CT owned).

I just did the required Iridium plugs on my XRS... found out whoever did them last used Platinums instead, I mean they still work but are not what the 2ZZGE motors call for.

For the 1ZZFE motors you're ok with Platinums, But you can get Iridium at CT as well . The NGK site is usually pretty good for reference, will tell you which one to use... I think NGK only makes one grade of Iridium, the motor calls for one but the NGK site will point you to the next grade... maybe one is now discontinued.

Just wait until CT has their sale and pickup all 4, takes about 30minutes to change them.

 

Those IR TT plugs make my 2ZZ scream even better man. Amazed how much better it idled with them!

 

15% off Bosch or NGK Iridium spark plugs starting this Friday September 8th at Canadian tire... how do I know? I get the flyer preview 4days in advance.