12-18-2018, 08:56 PM | #45 |
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Do you guys use any dielectric grease when installing spark plugs?
Seems like anti-seize is generally no longer recommended, but couldn't find as much information regarding dielectric grease. |
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12-20-2018, 07:51 AM | #46 |
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I do not and neither does the dealer
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02-05-2019, 05:53 PM | #47 |
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I bought the ebay spark plugs and received them today. The boxes say made in Germany and also the actual plug says Germany. It took about three weeks to get them. I feel confident that they are safe to install. We will see.
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02-06-2019, 04:37 AM | #48 |
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Here's my personal experience with NGK97506 & NGK95770 on a F32
I ran NGK97506s for about 4 months, F32 hated me for it . It was just not right, gapped at .022 and idle felt kinda rough but ran fine through the gears and no misfires. Increased gap and it fixed idle but on WOT felt small hesitations, again no misfires or codes. Decided to ditch them and try NGK95770s, @ gap .022 and idle immediately felt smooth, going though gears and wots felt fine also, one week with them and no issues so far. I'll probably save the 97506s since they still look fine, and try them again with PS2 if I go that route. But my car as it is now, did not like them. |
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02-06-2019, 10:09 AM | #49 |
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My mechanic recently installed a PS2 on my N55, I had 97506's on hand and he installed them with a gap of .018, mostly for altitude. Haven't tuned yet, but feels smooth all over.
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02-06-2019, 12:59 PM | #50 | ||
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02-08-2019, 12:57 PM | #51 |
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Thanks for the info. Very helpful, just a couple of questions.
I have BMS Stage 1 tune. BMS offers Plug change kit with NGK 5992 1-Step Colder Spark Plug. Based on the above, those are same temp as OEM. Being that I am only running stage 1 with no intention of going further, would these be fine, gapped to .020? Should I leave at the stock .03 gap? Also, do the coil packs need to be changed at the same time as the plugs? Thanks |
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04-05-2019, 12:07 PM | #52 | ||||||
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I don't recall seeing your post a month ago. It's weird that a notification just popped up to tell me about it today. To answer your questions: 1) I didn't order the rear 2-piston Brembo brake calipers by part number. (They are blue.) Bought them used from a guy on the forum. However I did do a lot of research because I was afraid to get stuck with the wrong part. I found out from Brembo themselves that casting numbers on the calipers are meaningless in that they are NOT BMW part numbers. I know that BMW sells M Sport brake packages on many cars so just because I found a set painted blue didn't necessarily mean that they would fit my 2015 335i. 2) They answer to my dilemma turned out to be the used rotors that matched and were being sold with the used blue calipers. The calipers that I was looking for for my car use larger rotors- 345mm x 24mm (1-piston stock rear calipers use smaller rotors- 330x20) So as soon as I verified the rotor size I knew the caliper was correct. Stock rotors wear great. The used rotors had 15k miles on them and measured less than 5% wear of the available wear material. Harbor Freight sells an inexpensive measuring caliper that works great for this. If u need rotors go with zinc coated Zimmerman's. They are a good German OEM manufacturer and the coated rotor hats won't rust like BMW rotors. 3) I just don't recall on the coding. I don't think new coding was necessary but just don't remember. Larger such as 6-piston front/ 4-piston rear would need coding. Hope this helps! |
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04-05-2019, 12:12 PM | #53 | |||||
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I'm no expert but I haven't seen anyone recommend changing coil packs EVERY time plugs are changed. With a bunch of performance mods going on my car now, I'm planning to change to NGKs with 0.020" gap right away. And investigate changing coils with my next plug change in 15-20k miles or so Hope this helps! |
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04-18-2019, 06:28 PM | #54 |
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I have a guess as to where this occasional comment originates concerning replacing the coils at the same time that the spark plugs are changed. I believe the stock Bosch plugs on a normal N55 are supposed to be changed every 60k miles. I've also heard to change the stock coils about every 60k miles. On a tuned car, such as BootMod3 Stage1, I've heard to cut that spark plug recommendation in half and change the Bosch spark plugs at 30k miles.
However, on more aggressive tunes, such as BootMod3 Stage2, BM3 recommends a switch from the Bosch plugs to the colder Laser Iridium NGK 97506 (SILZKBR8D8S), and to gap them down to 0.022". The gap on the Laser Iridium plugs can be changed easily, but you need a special smaller gapping tool typically used for motorcycles, etc. Snap-On has one for about $12 shipped. The Bosch plugs are more fragile and often break when attempting to re-gap them. The NGK's are recommended to be changed every 15k-20k miles. So the rule of thumb that I've heard is to change coils every other time that you change the NGK spark plugs which would be every 30k-40k miles, instead of every 60k with an untuned car on stock Bosch plugs. Hope this helps! |
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04-18-2019, 07:23 PM | #55 |
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04-18-2019, 07:46 PM | #56 |
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11-25-2019, 10:54 PM | #57 |
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Wanted to add to this endless debate/confusion. Hopefully it adds more data points to people looking for help.
I just changed out my spark plugs today @ 58k mi. I believe this was the first time they were done. Pulled them out and they were 0.031-0.032mm. I've been running BM3 Stage 2 for the past 5k or so miles. I upgraded to NGK 97506 gapped to 0.026mm. I wanted to try out 0.026mm and gap down as necessary. Car runs fine so far and burbles sound much more pronounced (running catless + stock OEM exhaust), so I'm sticking to this for now. I think 0.024 mm or even 0.022 mm will be fine. Next time around, I'll probably play around w/ 0.024 mm. |
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11-26-2019, 12:12 AM | #58 | |
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Did you have any indication of a misfire running stage 2 with those stock ones? And/or notice any improvement once changing them? I imagine the gap had increased a bit from wear. I am at 42k miles, original plugs, and was considering doing them at 45k with my next service. I am about to order a DP and was going to go to MHD 2+ but was concerned about doing so on 45k mi plugs. I am stage 1 with stock DP right now, no issues. |
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11-26-2019, 12:36 AM | #59 | |
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11-26-2019, 11:20 PM | #60 | |
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11-27-2019, 06:16 AM | #61 | ||
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Lately I've read that there are fake NGK's being sold on the market. Mine came from Burger. I'd trust that they are selling the real deal. |
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11-27-2019, 08:09 AM | #62 | |
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Where/what vendor did you get the bad plugs from? Did they accept the returns and reimburse you? I typically get my parts/fluids from FCPEUR and have not experienced any issues. |
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11-28-2019, 11:10 AM | #63 | |
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11-28-2019, 12:41 PM | #64 | ||
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11-28-2019, 12:42 PM | #65 | ||
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I've been on FCPEUR before, initially $20 per plug seemed steep but that's what I ended up paying when ordering from my local Indy shop. I spoke with the Indy mechanic some more regarding the plugs, he reassured me they will run perfectly fine. He told me he has the exact same car and runs those plugs. Then he took me around to a side garage and showed me his collection of cars. It could be an elaborate sales tactic, own 1 of every common body style since the 80's so he can say he knows what hes doing. haha It worked, the plugs come in tomorrow. I paid $130 after tax. I appreciate your input guys! Last edited by delorean175; 11-28-2019 at 12:54 PM.. |
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11-30-2019, 08:34 PM | #66 |
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I put the plugs in, I'm impressed so far. It drives way better. The old plugs looked really old. I have no idea when the PO had them replaced last. I'll be sticking with these from now on.
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