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Car Forum / BMW Cars / May 2005

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ticking noise

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Andrew Vevers - 04 May 2005 12:32 GMT
My '96 model 318i automatic has developed a ticking noise which seems to be
from the engine. It's not obvious at cruising speed, but appears when
starting off and accelerating. Oddly though the frequency hardly seems to
change whichever gear it's in. It also does it when revved in neutral at a
standstill.

It's not the exhaust blowing. On an older car it would sound like valve
clearance (tappet) rattle, but this has hydraulics and I'd expect the
frequency to change more obviously.

Anybody?
JimV - 04 May 2005 12:54 GMT
> My '96 model 318i automatic has developed a ticking noise which seems to be
> from the engine. It's not obvious at cruising speed, but appears when
[quoted text clipped - 7 lines]
>
> Anybody?

Likely normal fuel injector noise.
Andrew Vevers - 04 May 2005 14:58 GMT
">
> Likely normal fuel injector noise.

Thing is I've had this car maybe 6 years and it's only just started doing
it, and I'm concerned whether it's about to let me down. I want to get rid
of this car soon and not spend much. Is it an easy fix, if that's what it
is?
Malt_Hound - 04 May 2005 15:18 GMT
> ">
>
[quoted text clipped - 4 lines]
> of this car soon and not spend much. Is it an easy fix, if that's what it
> is?

It is possible to have excess valve noise if there is a sticky or bad
hydraulic lifter.  Have an experienced mechanic give it a listen and see
what they think.

-Fred W
fbloogyudsr - 04 May 2005 16:16 GMT
> Andrew Vevers wrote:
>> My '96 model 318i automatic has developed a ticking noise which seems to
[quoted text clipped - 12 lines]
>
> Likely normal fuel injector noise.

A FI or valve tick would change depending upon engine revs, which
Andrew claims is not the case (note comments about frequency/gear).
I'd put my money on something like the (almost) constant-speed cooling
fan (fan clutch), or perhaps a bad engine mount that is allowing the engine
to contact something in the engine compartment while under heavy load.

Floyd
ps-master - 05 May 2005 09:13 GMT
Dear Andrew,

From that you've described, it sounds like a worn cam shaft

I had a 316 a while ago that had exactly the same problem.  This is a
common problem on 4 cylinder engines (316 and 318).

I had the cam shaft replaced and everything was 100% again.
 
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