there is no adjustmnet due to the fact BMW uses a 4 electrode spark plug and those cannot be adjsted.
.144
1.00-1.10mm
.144
39-41"........thousands of an inch or 1 to 1.1 mm....millimeters
Go to this link and it will explain the whole process. http://www.e46fanatics.com/howto/howtodetail.php?howto_id=44
The correct gap for these spark plugs is 1.1mm. When you buy new plugs they should already be adjusted to the right size. My car book says to look underneath the hood at the engine specifications.
under the hood
In the radiator
your 90 Mazda 323 firing order is 1342, the same as all in line Asian 4 cyl. eng.AnswerTo add to the answer above, Timing should be 6-8 degrees btdc (before top dead centre).Spark plug gap should be 1.1mm.
If it's electronic ignition the plug gap should be 1.1mm you buy spark plugs already sized (NGK BP5ES-11) It depends on what type of spark plugs you are using. For conventional plugs the gap of 1.0 - 1.1 mm (0.039 to 43") is correct. If you are running Platinum plugs, I like to gap at 0.005" extra (0.44 - 0.048"). I get good performance with NGK 7082 Platinum. Cheers Malcolm
The highest watt headlight bulb you can use in a 2000 Mazda 323 is 65 watts. Most vehicles use a 55 watt bulb.
5w 30 synthetic oil