1989 bmw 750il- what spark plugs?

[Mike Sanchez]

What Spark Plugs do i replace the original ones with?......the car has has a 144.5 miles on it....

[shogun]

For the M70 tendency is now to use NGK BKR6EK (2288) , works well, my wrenching buddy also has them installed on his E32 Alpina B12 M70. He has them now installed since some years and he showed me on his car the difference, idle is really smooth now. I also ordered them for my M70 although they are not officially listed for the M70 engine, but for the M60 V8. They fit perfectly and are very close as far as insertion depth in the cylinder, so they are safe. It is the spark plug which all of the 850i guys use when they want to find a close-to-stock Bosch replacement and want to keep the impedance down; that's how I came across using them.

"officially" to be used: 735i (E32)
M30 All Bosch W8LCR / W8LPR (+) .028” - .032” (0.7 – 0.8 mm)
740i (E32) M60 All Bosch F7LDCR Non-adjustable NGK BKR6EK Non-adjustable
750i (E32) M70 All Bosch F8LCR .028” - .032” (0.7 – .08 mm)

Torque specifications for unlubricated spark plugs (i.e., no oil, grease, etc. on threads) Standard Engines: Spark Plug Thread = M14 x 1.25 Motorsport Engines: Spark Plug Thread = M12 x 1.25 31 ± 2Nm (23 ± 1.5 ft/lb) 23 ± 3Nm (17 ± 2.2 ft/lb)

also can be used for M70
Bosch 7959 Spark Plug; Ytrium Enhanced Copper; Standard Electrode, Updated replacement to original factory spark plug, F8LCR and FR8LC. Pregapped for normal usage.
Bosch 7404 OEM - Spark Plug; Yttrium; Standard Electrode OE Plug, Superceded Yttrium enhanced version 7404-FLR8LDCU per Bosch. Updated version of original plugs F8LDCR and FR8LDC. Pregapped for normal usage.
Bosch 9651 Iridium - Spark Plug , Bosch original equipment design with ultra-fine wire iridium center electrode and iridium-platinum tapered ground electrode deliver optimum performance and durability. Do Not Gap, Gap is Preset
Denso Q16PRU
Denso Q16PRTP11
Denso IQ16
Denso PQ16TT
NGK PZFR5F
NGK BKR6EK
http://www.autohausaz.com/search/pro...id=25@Ignition Parts&gid=7212@Spark Plug

[eYeballZ]

Sorry to resurrect a beaten horse... Is this information still relevant for the M70? and is the LC+ any different than the aforementioned?

[shogun]

most recommend still to use the NGK 2288 BKR6EK for fitment on the M70 https://www.ngk.com/ngk-2288-bkr6ek-...und-spark-plug mainly because the Resistor Value is 1K Ohm like the original Bosch

[eYeballZ]

When I posted this question I had already purchased
Bosch F8LCR+ #12 12 9 061 870
So I went ahead and tried them out. I'm not sure regarding cold measurement of spark plugs but I got 1.5 k ohms.
Could the "+" be a newer version that made the difference?
She purrs great! but I did install new wires with them so I added another variable to further complicate the issue. Lol

[shogun]

fits, BMW Spark Plug Bosch F8LCR+ - Genuine BMW 12129061870 for 750iL, 850Ci, 850i, E30 M40, E34 M40, ETK says simply BOSCH F8 LCR

[shogun]

here you have the T*S in Russian language, use google translate https://tis.bmwcats.com/ also covers E32