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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 03-02-2008, 11:56 AM   #1 (permalink)
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Valve adjustment how-to for an '81 320i?

Been searching around the forums, but not finding what I'm looking for. Has anyone posted a nice write-up on tips, tricks and pitfalls, or even a step-by-step for checking and adjusting the valves on an e21 320i? How about checking if they need to be adjusted?

Any help greatly appreciated.

Thanks,
/Mike
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Old 03-02-2008, 02:35 PM   #2 (permalink)
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Quote:
Originally Posted by UncleMike
Been searching around the forums, but not finding what I'm looking for. Has anyone posted a nice write-up on tips, tricks and pitfalls, or even a step-by-step for checking and adjusting the valves on an e21 320i? How about checking if they need to be adjusted?

Any help greatly appreciated.

Thanks,
/Mike
1. Disconnect necessary components noting installation position, then remove cylinder head cover.

2. Rotate crankshaft using suitable wrench or remote starter, until No. 1 cylinder is at TDC on compression stroke. Always turn crankshaft in normal direction of rotation.

3. Check clearance of No. 1 cylinder intake and exhaust valves, inserting suitable feeler gauges between tip of valve stem and rocker arm. Valve clearance for intake and exhaust should be:

Cold [1] 0.20mm (0.008in)
Hot [2] 0.25mm (0.010in)
NOTE : BMW provides both hot and cold valve clearance specifications but does NOT recommend hot valve clearance adjustment.

4. If clearance is not as specified, adjust as follows:

a. Loosen adjusting cam locknut on side of rocker arm.
b. Rotate adjusting cam on tip of rocker arm to obtain specified clearance.
c. Hold position of adjusting cam and torque locknut to 6.5 to 8 ft. lbs.
d. Check clearance.

5. Continue rotating crankshaft until each cylinder in firing order is at TDC on compression stroke, checking and adjusting valves for each cylinder as outlined in step 4.
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Old 03-02-2008, 02:39 PM   #3 (permalink)
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Can't really ask for more than that.

Thanks,
/Mike
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Old 03-02-2008, 02:47 PM   #4 (permalink)
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Can't really ask for more than that.

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/Mike
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Old 12-23-2009, 12:00 PM   #5 (permalink)
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Exclamation e21 valve adjustment

I remember seeing that you want to check clearances again after 600 miles:

somewhere (going to find) once saw a great page/site with captioned pics, I'll get back to yooz
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