KLZE PLUGS

jschrauwen · Post by **jschrauwen** » March 10th, 2005, 10:59 pm

OK, done my obligatory search and have not come up with conclusive results. Pulled old plugs from ZE (NGK R ZFR5F-11). Had already purchased 2.5L MX6 plugs (NGK Iridium IX, ZFR5FIX-11). Assuming same plug with the Iridium suffix (IX) added in the numbering. NGK site indicates '95 Xedos9 2.5L KLZE - ZFR5F-11 and '95 MX6 2.5L KL - ZFR5F-11. Both new and removed plugs look identical wrt electode projection length.

What are the rest of the ZE gang using for plugs? Am I in the the right heat range?

DavidOS · Post by **DavidOS** » March 11th, 2005, 1:11 am

Bkr6e11 is another type, NGK

TsiMiata · Post by **TsiMiata** » March 11th, 2005, 7:50 am

I use ones from the 93 Ford probe 4 cylinder. Same as the KLDE plugs but one heat range colder.

mazdubber · Post by **mazdubber** » March 11th, 2005, 5:52 pm

4 cylinder probe plugs are the BKR6E-11. That is also the plug that come in the KLZE from the factory. In japan they are called NGK R's, here we call them V-Grooves. But they are both the same. I've heard bad stories about the ZFR's. They are a longer plug than the BKR and I've heard people talk about the gap closing up from the piston touching it or something.

jschrauwen · Post by **jschrauwen** » March 11th, 2005, 6:26 pm

mazdubber wrote:4 cylinder probe plugs are the BKR6E-11. That is also the plug that come in the KLZE from the factory. In japan they are called NGK R's, here we call them V-Grooves. But they are both the same. I've heard bad stories about the ZFR's. They are a longer plug than the BKR and I've heard people talk about the gap closing up from the piston touching it or something.

I used to know the NGK spark plug charts better years ago. I'm not sure what the ZF or the BK stands for in the BKR6E-11 / ZFR5FIX-11. Like I said before, the IX is just an added designator stipulating that it's an Iridium plug. I realize the #5 or #6 is your designated heat range and the #6 heat range is for the '95 2.0L Xedos6 and the #5 is for the 2.5L KL and KLZE (as per NGK website). I'm also not clear on the letter designation after the #5 or #6 - it's either an E or an F. Some where in the plug designation is the electrode extension length (projection)....I think. Motorcycle plugs included the letter P to reflect that it's a projected tip plug, so I'm assuming that perhaps the #11 covers that???? I think I'm still safe with this plug, but as you have eluded to MAZ, the issue of piston clearance concerns me, cause I vaguely remember a few posts addressing that, but I couldn't find that post. Hoping some of the ZE gang can give me the thumbs up on my plug selection.

johnnyb · Post by **johnnyb** » March 11th, 2005, 6:39 pm

hmm I found an interesting little article about reading the spark plug code.

http://www.ngksparkplugs.com/techinfo/s ... berkey.pdf

is this what you were talking about jschrauwen?

mazdubber · Post by **mazdubber** » March 11th, 2005, 6:57 pm

http://forums.probetalk.com/showthread.php?t=1700998312

jschrauwen · Post by **jschrauwen** » March 11th, 2005, 7:00 pm

Nice find Jb. Using the Euro NGK site didn't have this. That's a keeper, thanks. What say you, ZE gang??

babyblueMX3 · Post by **babyblueMX3** » March 11th, 2005, 7:45 pm

I always used NGK BKR7E-11's

Trevor · Post by **Trevor** » March 11th, 2005, 8:50 pm

Don't have thme in yet but I just bought NGK iridium's for a 93-97 Milennia/626

Gro Harlem · Post by **Gro Harlem** » March 12th, 2005, 2:35 am

do NOT use ZFR's in your engine!!! The pistons can hit those plugs & destroy everything.

U want the BKR6E11 (stock probe 4-cylinder FS motor ones)

Trevor · Post by **Trevor** » March 12th, 2005, 12:55 pm

I just went and exchanged my plugs for the prob ones thanx Gro!

jschrauwen · Post by **jschrauwen** » March 12th, 2005, 1:14 pm

Gro, Trevor and others, many thanks.
Just spent last 2 hours sifting through PT archives and found almost similar posts to the pro's and con's of ZFR's and BKR's. Although there were ZFR's in my ZE originally, showing no signs of contact with piston, I believe I should side in the direction of prudence and go for the BKR's. Having said that, Trevor has Pm'd to say that he had BKR6EIX-11's to install and now he's going to exchange them again (I think).
Gro, I'd like to go the BKR route with BKR6EIX-11 because it has the colder range (6) for one but mostly because it's an Iridium plug (IX) which I believe is a more efficient plug. Can this be confirmed and because it's a BKR, I shouldn't have any clearance issues to be concerned with also - your thoughts? I know the Iridiums (IX) are pricey, but my baby's worth it.

jschrauwen · Post by **jschrauwen** » March 12th, 2005, 7:04 pm

Trevor wrote:I just went and exchanged my plugs for the prob ones thanx Gro!

What plugs did you end up using?

lakersfan1 · Post by **lakersfan1** » March 13th, 2005, 12:07 am

I did a search a couple weeks ago on my own, and found that the KLZE and KFZE in Japan both used Denso K20PR-U11.
http://translate.google.com/translate?

http://translate.google.com/translate?h ... en%26lr%3D

I even checked the clearance of the plug electrodes with the heads off the car. There's no possible way these plugs will hit the pistons. Plenty of room. It makes things easier for me as those are the same plugs I use in my 2000 626, so I only have one kind of plug to use now.