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E31 850 CSi and E24 M635 CSi M635 CSi (E24) 1983-89 and 850 CSi (E31) 1992-96. The Ultimate Grand Turismo by BMW M.

 
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post #1 of 4 Old 11th June 2013, 03:35 PM Thread Starter
Feld1128
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Spark Plugs

Seems like a simple question but does anyone know which spark plugs I should run in my M88 engine, 1985 M635CSI? I am finding conflicting information. Thanks.
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post #2 of 4 Old 12th June 2013, 11:40 PM
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There is no conflicting information at all regarding the correct spark plug for the M88/3 engine:
It uses the Bosch X5DC plug.........end of story.

For those who like to use an NGK plug, the D7EA will be the closest equivalent, but I do not recommend using this plug in the M88 engine, as it has a slightly different hex configuration to the Bosch item, with the result that the BMW-supplied plug wrench will not engage it properly during installation/removal.

So just stick with the Bosch plug and you can't go wrong.

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1986 E23 745i/M88 (6928) Arctic-metallic/Oyster Nappa
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post #3 of 4 Old 13th June 2013, 03:02 PM Thread Starter
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Thanks, this is what I came up with also. In the US the gray market cars do not come up in any of the common auto part databases, only the 87-88 E24 when officially imported by BMW. I have found some good sources of information and parts sources since I have acquired this car. I appreciate your response.
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post #4 of 4 Old 13th June 2013, 11:28 PM
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No problem, glad to be of assistance.

Do you use RealOEM.com?

All you have to do is enter the last 7 digits of your VIN and up comes the parts listing for your car - whether gray market or otherwise.

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1987 E28 M5 (DC98) Delphin-metallic/Midsilver Nappa
1986 E23 745i/M88 (6928) Arctic-metallic/Oyster Nappa
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