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Old 07-30-2001, 09:09 PM   #1
FengShui
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Default sparks plugs?

Fellas,

I am planning to change my bosch platinum. Any good suggestions for an 002.5RS?

Peace out,
Mykael
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Old 07-30-2001, 10:17 PM   #2
Keenan
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I have some NGK's.

On my service invoice from Centaru Subaru:

4 SAC500013 SPARK PLUG NGK BKR6E-11

Each one was $3.85.

I have no idea what that means but maybe it means something to someone on here.

Just don't tell me they put in the wrong plugs.

Keenan
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Old 07-30-2001, 10:26 PM   #3
FengShui
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Were they the stock plugs? I am looking better plugs that what I have now. Help anyone!


Peace out,
MLA
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Old 07-30-2001, 11:14 PM   #4
Keenan
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These replaced the Champions in my car. As far as I know, these are the standard NGK's for our engine. I am sure someone else out there knows a bit more than me.

Keenan
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Old 07-30-2001, 11:48 PM   #5
GTBGUY
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'98 QS Legacy L (auto)

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Canadian Tire also has NGK Iridiums available for our cars. May want to take a look into that.
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Old 07-31-2001, 03:49 AM   #6
damianq
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The NGK Iridiums fire too cool for our cars. Found out the hard way. Cough, sputter, surge. They don't idle well but once your above 3G's they do the job just fine but at that point you're running rich anyways. I think they are 1 heat range too cool.
I then tried some NGK platinums, the car ran extremely smooth. Maybe they will be fine, it's just my experience w/ Iridiums. I do believe in NGK's far more than I do Bosch.

Search for someone having a catastophic failure with thier Impreza when the used Bosch Platinum +4s. I think they ended up frying the coils, wires, ECU & everything leading up to there. I'm sure I read it somewhere here.

I personally change plugs every 10,000kms no matter what I am using, platinums or not. I try everything.
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Old 07-31-2001, 10:49 AM   #7
GTBGUY
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Sorry, forgot to mention that the Iridiums were being ran in a turbo'd RS... so hence they require the colder heat range.
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Old 07-31-2001, 01:53 PM   #8
V6
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Yeah,
The NGK BKR6E-11 is good for the 2.5RS
You can find the V-power or platinum from local auto parts store (ie. Canadian Tire, Part Source, etc...)
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Old 08-01-2001, 01:08 PM   #9
inpreza kid
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i'm looking to replace my bosch plugs too. read some stories about burnt plug wires and screwed up coil packs. anyone have the part numbers to the ngk platinum's or the v groove's? don't know if i want to replace them with just regular coppers.
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Old 08-01-2001, 01:48 PM   #10
FengShui
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Impreza kid,

This morning, I bought the NGK BKR6E-11 at part source Less than $14.00 in total. They have them on the shelves. CDN tire has to source them out. ALSO join the membership , free!
K&N cleaner is 15% off & total of $13.00 ...Cleaning my PRM CAI tonite also.

Peace out,
Mykael
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Old 08-01-2001, 05:16 PM   #11
inpreza kid
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FengShui thanks. i'll pick some of thoes up later and change my plugs again. hehe. i love working on my car.
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Old 08-01-2001, 05:46 PM   #12
scooby5
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NGK-R PZFR6F-11 , an upgrade from the BKR6E

About $21ea at Canadian Tire, $16ea at UAP/NAPA
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Old 08-01-2001, 06:03 PM   #13
inpreza kid
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i just picked up the BKR6E-11. i'll be putting them in later. i guess the reason i went with coppers is i'll be changing my plugs every year or so to keep them fresh. plus they aren't that much compared to the bosch ones i had before.
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Old 08-01-2001, 08:16 PM   #14
inpreza kid
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i just changed my plugs. the bosch plugs are junk. they are all burnt out and covered in carbon. a word of advice is never get bosch plugs. and tips are suppose to be self cleaning, self cleaning my @ss. these look worse than the stock champions and keep in mind these plugs have only 3000km's on them. my champions had about 8000km's on them when i changed them. when i get back to beaverlodge i'm going to see if i can get a refund for these stupid things. here are some pics.






Last edited by inpreza kid; 08-01-2001 at 08:22 PM.
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Old 08-02-2001, 12:47 AM   #15
FengShui
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Any difference?
Mine will be in tomorrow morning. Did you gap them?
Also @ SC, My 02 sensor will be replaced & rear sway bar going with 18mm. My engine light did not go on at all.
Better safe than sorry.

Peace out,
Mykael
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Old 08-02-2001, 12:49 AM   #16
FengShui
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scooby 5 are those platinum? NGK-R PZFR6F-11 ?Thks,

Peace out,
Feng Shui
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Old 08-02-2001, 05:49 AM   #17
damianq
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InprezaKid
Your old plugs seem to be fine. That is how they burn, You may be running a li'l lean. You have a CAI installed don't you?

Plugs do not cause discoloration of the plug tip in any way, shape or form. Only combustion. There is a guide in every Chilton's & Hayes manual about how to dignose plug conditions as a result of combustion. It's worth a look next time you're in the store. You don't have to buy it, just take a look. If your plugs were absolytely clean, thenI'd worry.

Oh yeah, I work on (race) cars for a living, although I am not yet a certified technician.
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Old 08-02-2001, 10:51 AM   #18
inpreza kid
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on other cars that i've see the plugs have a light coat of black/grey carbon. when you look at the plugs i pulled they are brown and the center electrode on one one of them seems out of place compared to the other 3. can this be caused by worng hear range? i read there was a error in their database. so you figure that my engine is running lean? i just have intake and exaust on my car. the champions looked 2x better than this and they had arounk 8k km's on them so something must not be right.
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Old 08-02-2001, 12:56 PM   #19
FengShui
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Fellas,

Just got back from SC, Plugs changed, 02 sensor replaced, replace also #4 spark plugs wire since it has started to burn, still under warranty, have the 18mm sway bar in, what a difference.
Car running smoothly. Like someone mentioned every 10,000 kms, i'll be changing. SC(Subaru city) got 14 WRX yesterday & 13 are bought already except for a black WRX wagon. It won't be there for long. Gone cruising now since the weather is nice. Any meet happening soon?Red Deer?

Peace out,
Feng SHui
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Old 08-03-2001, 02:28 AM   #20
damianq
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All your plugs should look the same. A little carbon on the end is normal. Actually, if it isn't there, be worried.

But if you have just one plug w/ the electrode burnt of craked or broken, it is a good possibility that is is burning too hot for the amt of fuel its getting. Probably just a bad plug. I wouldn't worry about it unless it happens again to the same cylinder. If it does take it to Subaru or your favorite service shop.

I've also seen this happen when a plug boot is not plugged on correctly. It touches enough to carry current but at a lower potential. Make sure your plugs boots make a decided click when putting them on. This latter circumstance can be catastrophic to tubo engines.

PM me if you are still concerned. I wouldn't be.
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Old 08-05-2001, 06:44 AM   #21
ZERO-R
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Question NGK's Heat Range of "6" too cold for RS???

I used the NGK's Iridiums from Can-tire since early May, and I found no problem at all in all rpm ranges.
I used NGK G-Power before(BKR6E-11, actually same parts# with Iridiums but Iridium plugs got extra "IX" or somthing on the parts# eg. BKR6EIX-11) for last 1-1/2 yr and found no major negative problem. I switch to Iridiums because 1.It last longer than G-Power 2.It was on sale 3.I want Iridiums for a long time already but they were not available in N.A. and too expensive in Asia ~$20CDN a plug (NGK's IX).
NGK's OE plugs parts# for 2.5L is BKR6E-11(actually Subaru's plugs are pretty much interchangeable, DOHC and SOHC. Well, maybe except SVX or Justy and other "special"(strange) models...)
Since the Iridiums and G-Powers for our cars are both in heat range of 6<NGK's heat range>, I don't think there should be a problem to used Iridiums if the car can run fine in G-Power. Iridium is (very)little better because it's harder stuff so they can cut the electrode tip... they last longer because better material(coating) is used for the shell to against the "rust"(corrosion)
If I have a choice of brand, I prefer Denso's plugs... base on previous experience on customers' cars. (I used to worked in performance shops in both Hong Kong and Calgary) On the other hands, I dislike the Bosch very much, especially the +4s... Seems like they don't do any good in Japanese motors... can't really perform well in high temp. maybe...
Why PZFR6F-11? These rip-off original platinum plugs can last 2~3x longer than G-power, but for almost 8x the money... they came standard on my 98 DOHC 2.5L, they claim their lives can reach 60,000 km, but I throw them away @35,000 km because these stuff are not great after they reach "mid-age"(~30,000km).
These OE plugs maybe good for those who don't change their own plugs so they don't have to pay labour every 20k or so...
For those who change their own plugs(NOT HARD AT ALL, especially on SOHC, No "special" tools needed on both DOHC and SOHC) I think G-Power is a good choice. For those who are lazy like me, get Iridiums so don't need to change the plugs "that" often...
One more thing, Most NGK plugs I seen so far are NGK-Rs, even the ones in lawn mowers... so what so special? I don't think the "R" stand for something means like "Race" in this case... I feel it stand for "Rice" if we care...

Just a "few" comments...
Good Luck

AL
98 RS

Last edited by ZERO-R; 08-05-2001 at 07:02 AM.
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Old 08-05-2001, 01:07 PM   #22
damianq
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Like I said, "I" have just not had a good experience w/ the Iridiums in "my" car. See, they work perfectly fine in another memeber's car. Anyone who wants to try them should. They are suppoed to be very, very good.

FYI: ALL N/A Subaru Motors over 2L use the same plug. ALL N/A motors 2L & under use the same plug. The Turbos use a cooler plug but all the same nonetheless.

IN RACING, all the newer (94up)import racers use the NGK G-power, simply b/c they use the plug condition to visually verify how the engine is running. Most 70's import & lower displacement domestic racers are using Bosch Silbers. That's Silber, not Silver the color. That's for above 1000 feet above sea level. Lower than that you must use a hotter plug.
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Old 08-05-2001, 01:16 PM   #23
scooby5
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Fengshui,

The PZFR6F-11 are double platinum tipped. Both Anode and Cathode have platinum on 'em.
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