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Noisy Valve Train E46
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#1
06-20-2017, 04:48 PM
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Noisy Valve Train E46
I took my long suffering high mileage BMW out to get the inspection done today. There was a noticeable sound like a knock coming from the front of the engine. It was quite audible when cold (in the driveway) less so once the car was driven a bit. I thought it might be a bad pulley. The inspector said it sounded like it was more from the valve area. Other than replace the breather apparatus (which doesn't move) and the Valve Cover Gasket, I haven't really done any work on this since new. I haven't had any real time to diagnose or "internet diagnose". Anyone with experience have a starting point?
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1983 911 SC Targa - 1990 944 S2 
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#2
06-20-2017, 06:08 PM
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The VANOS on the E36 can start sounding like a rock tumbler when it goes. Given that it is in the front of the engine, that might be something.
BB.
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Some say "My car is a Porsche!" I say "My Porsche is a car!" and I drive the hell out of it.  '87 Porsche 944; '10 BMW 328i xDrive (her's); '98 BMW 323is (ours)
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#4
06-20-2017, 06:25 PM
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Yup, vanos was going to be my diagnosis as well
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Turning good track cars into other people's headaches since 1990 Denis Jenkins (PCA'86) 95 318ti S54 97 318ti S52 95 M3 S54 vin 00067 87 RX7 ITS 02 330i 98 328i 71 911T 70 Karmann Ghia, 96 f350 7.3 available Gone 4 356's,1 996, 4 911's, 1 912, 2 Boxster S, 5 914's, 3 944's, 3 951, 1 924S, 3 95 m3, 03 M3,95 Ti/CS. 97M345, 84 rx7chump car, ITB gti 21, ITB GTI 48, 89 325is s52,07 Z4 coupe, 69 Charger General Lee, 2 66 Cadillac verts, 1 68 cadillac vert, and many many others
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#5
06-20-2017, 07:05 PM
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Deflated, failed, or stuck lifter. The valve train in these cars are not very quite in the first place. Not a difficult job to replace the VANOS on these cars. I did this with an exchange unit works great.
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#6
06-20-2017, 11:59 PM
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Old school trick is to put the tip of a long screw driver on the suspect area and handle against your temple to locate noise. OR use the $4 HF stethoscope.....
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David I hope to arrive to my death, late, in love, and a little drunk! Just because I don't care doesn't mean I don't understand... Homer Simpson "That's what's keeping me out of F1.... Too much mental maturity...." N0tt0n Some cause happiness wherever they go; others whenever they go. CHAOS, PANIC, AND DISORDER my work here is done... Live without pretending, Love without depending, Listen without defending, Speak without offending
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#7
06-21-2017, 11:32 AM
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Sounds like VANOS to me. http://www.drvanos.com/
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95 993 16 GTI 02 BMW Spec E46 #27 01 Boxster 86 944- AER/Chump #33 20 F250 Tremor
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