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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 04-02-2004, 04:02 PM   #1 (permalink)
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I have an e30 325is which has done 110k. I recently serviced the engine and replaced the timing belt tensioner and all the belts. The engine still makes this clicking sound which seems to be coming from the valve/tappet area. My mechanic says that these cars are naturally noisy but the noise wasn't this loud before. Does anybody have any suggestions?
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Old 04-02-2004, 04:38 PM   #2 (permalink)
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how rapid is the clicking?
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Old 04-03-2004, 02:12 AM   #3 (permalink)
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Locating a noise is just a tool away.

You can buy a stethoscope.

Or use a mechanics stethoscope:

A long screw driver and place the handle against your ear.

Remember to stay clear of moving parts and electrical connections.

Use the metal tip to locate the loudest location and then we can suggest the fix.

These BMW engines are a lot of things, but noisey is not one of them.

My WAG, Wild Assumed Guess, is a worn injector.

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Old 04-03-2004, 10:30 AM   #4 (permalink)
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I'm curious to know how a worn injector can cause a clicking noise in the engine. I'm sure there's a logical reason for this, but I cannot think of one at the moment.
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Old 04-03-2004, 05:10 PM   #5 (permalink)
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The clicking speed increases as the revs increase and you can barely hear it when the engine is idling. It sounds embarrassing when you are gearing down and the revs go up and you hear this annoying clicking noise. One thing I should point out is that the previous owner now tells me that he blew the head gasket about 1 year ago and they repaired it by welding the crack in the head. Could it be a dodgy head?
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Old 04-05-2004, 09:54 PM   #6 (permalink)
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Hey,
My car starting doing that today! though u can hear it when its at idle. Actually, the car idles rough too... And I just bought the car friday.

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Old 04-05-2004, 10:11 PM   #7 (permalink)
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My 325 has an extremely slight click to it, which I can't hear over the transmission above like 2500rpm. Probably just a valve or something.
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Old 04-06-2004, 11:17 AM   #8 (permalink)
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probably a valve.
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Old 04-06-2004, 05:13 PM   #9 (permalink)
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I had the very same problem with my 84 325e. Really loud tickng noie from the engine. 2 possible reasons. 1. blown cylinder head then you better think of a new car. 2. lifters are just loose over time. You can get them re tighten by a mechanic.
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Old 04-07-2004, 08:58 AM   #10 (permalink)
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Good news....i had my mechanic reset the valves and the clicking/ticking noise is gone now. It sounds alot better especially with the lambros hi-tech exhaust. But my mechanic now tells me that my exhaust header/extractor has a crack in it which is affecting idle and power. Will need to get that repaired soon and I will have a problem-free 325is.
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Old 04-26-2004, 03:43 PM   #11 (permalink)
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In what way is it affecting idle?

Does the rev member to up and down slightly in idle?
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Old 05-24-2004, 11:38 PM   #12 (permalink)
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the valves probably need to be adjusted, has anyone done this themselves? i plan on undertaking this task while replacing my valve cover gasket, any special tools needed?
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