![]() | Home > Technical (L322) > Failing spark plugs |
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 596 ![]() ![]() ![]() |
Last May I did the rocker covers and their gaskets. Changed all 8 spark plugs with NGK but only changed two ignition coils that were soaked in oil.
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 596 ![]() ![]() ![]() |
By way of update
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dingg1 Member Since: 29 Jun 2013 Location: PORTUGAL Posts: 1358 ![]() ![]() |
Is it a 4.2sc or the BMW engine?
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 596 ![]() ![]() ![]() |
It's the BMW 4.4
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 596 ![]() ![]() ![]() |
Wrapping this up for the collective benefit: Leaky cylinder #5 due to HGF or cracked head. First spark plug change lasted for 3 months as per above. Second change lasted for several months without misfires and all in all for a year (27k km) until the eventual spark plug failure.
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vs322 Member Since: 08 Apr 2020 Location: Athens Posts: 596 ![]() ![]() ![]() |
And now this is getting interesting. I was there when my mechanic was undoing #5 cylinder spark plug. I swear it gave with zero effort and I therefore suspect it was loose.
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