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Replacing crankshaft sensor

BMW forum 3 series car: E21, E30, E36, E46, E90, E91, E92, E93, F30, F31, F34, F35

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Replacing crankshaft sensor

Postby Phatjap » Fri, 26 Oct 2007 20:36:03 UTC

Ok, I'm going to look at replacing the crankshaft sensor tommorow as today on the way home I had no end of trouble,stalling, running badly etc needing me to stop, turn the ignition off a ns restart on the hard shoulder today a couple of times. I woud be grateful for any tips from anyone whose done this or who can point me to a tutorial etc?

Secondly, can the cam sensor produce the same symptoms as the crank sensor?

Regads.
1997 black 323i SE auto gas guzzling power plant.
Yamaha XZ550 1984 vision-only 2 more years and no tax!

www.goldplating.org.uk
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Postby Digidick » Fri, 26 Oct 2007 20:54:03 UTC

Who says its the crank sensor?? Sounds like a cam sensor to me.

Here's how you change it

http://forum.e46fanatics.com/showthread ... t=camshaft
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Postby Phatjap » Fri, 26 Oct 2007 21:16:49 UTC

Hi
This is where I got the idea for the crank sensor...

http://www.bmwland.co.uk/talker/viewtop ... ght=sensor

Any second opinions? Crank or cam?
1997 black 323i SE auto gas guzzling power plant.
Yamaha XZ550 1984 vision-only 2 more years and no tax!

www.goldplating.org.uk
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Postby cwc2128 » Fri, 26 Oct 2007 22:56:32 UTC

Yes its worth a scan

Cam sensor usually gives performance probs bad idle

Crank sensor usually cuts engine out and hard starts
etc
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Postby Phatjap » Sat, 27 Oct 2007 07:28:04 UTC

Damn,
The trouble is that I had a diagnostic done and no faults showed. The garage also drove the car around for an hour but could not produce any symtoms whatso ever....and that cost me £65, plus petrol,so thr dilema now is that if I get another diagnostic done and it doesnt show, it costs me £65 and I'm none the wiser.

I'll have a think today.
1997 black 323i SE auto gas guzzling power plant.
Yamaha XZ550 1984 vision-only 2 more years and no tax!

www.goldplating.org.uk
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Postby Digidick » Sat, 27 Oct 2007 08:07:41 UTC

cwc2128 wrote:Yes its worth a scan

Cam sensor usually gives performance probs bad idle

Crank sensor usually cuts engine out and hard starts
etc


Cam sensor does all of the above. Ive had to change mine because of it :evil:
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Postby Phatjap » Sat, 27 Oct 2007 08:50:11 UTC

Ok thanks digi, I might start with the cam. Did you do it yourself? if so, difficulty rating?

Cheers
1997 black 323i SE auto gas guzzling power plant.
Yamaha XZ550 1984 vision-only 2 more years and no tax!

www.goldplating.org.uk
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Postby Digidick » Sat, 27 Oct 2007 17:41:38 UTC

Phatjap wrote:Ok thanks digi, I might start with the cam. Did you do it yourself? if so, difficulty rating?

Cheers


Yeah I did it myself. Out of 5 its about a 2. Just follow the link in my first post it helped loads.

Part should be about £50'ish from BMW.
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Postby Phatjap » Mon, 29 Oct 2007 08:16:51 UTC

Thanks digi,
well, i did not get round to doing it, after 20 phone calls to find the part, only one could get it in Swindon, and it would not be here till next Tuesday!! And then it would be £74!

So I have a dilema, would this part fit, from a 2002 model engine?

http://cgi.ebay.co.uk/BMW-2-5-twin-vano ... dZViewItem

This will cost me £20, which I don't mind losing, but not £74,just incase its not that, if it fits of course.

Any ideas?
1997 black 323i SE auto gas guzzling power plant.
Yamaha XZ550 1984 vision-only 2 more years and no tax!

www.goldplating.org.uk
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Postby m330d » Mon, 29 Oct 2007 10:52:17 UTC

compare part numbers on www.realoem.com but as the later 323 is a different engine id say it probally wont fit.Actually there was no 323 in 2002 stopped in 2000?????????
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Postby Phatjap » Wed, 14 Nov 2007 08:26:29 UTC

Just an update....

Replaced the sensor at the weekend, first drive the other day and got the same sudden engine cut out for a split second and then the timimng was out (pinking, lack of power ) so I pulled over on the hard shoulder and stopped the engine and restarted and it was ok again.

Any ideas? I think I might have to look at replacing the crankshaft sensor now...could that cause these same problems?

anyone doe this? Easy? Hard?

Regards,
Phatjap.
1997 black 323i SE auto gas guzzling power plant.
Yamaha XZ550 1984 vision-only 2 more years and no tax!

www.goldplating.org.uk
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Postby sg_frost » Mon, 19 Nov 2007 21:59:01 UTC

Sorry I missed this post earlier. 110% crank sensor fault.
Car will run with a lack of power if the cam sensor is faulty, but cuts out if the carnk is faulty. let me explain....
The ecu looks for a signal from the cranksensor to see that the engine is turning. When it sees the engine turning it fires off the spark plugs and injectors etc. When it sees no signal from the crank sensor, it assumes that the engine has stopped, theerfore cuts the ignition etc. So when the sensor is faulty, it tells the ecu that the engine has stopped, the ecu accepts this and no fault is stored.

Do a search in the tech forum for how to but heres a quick rundown.
Pull bottom radiator hose forward and use 5mm allen key to undo bolt.
Wiggle crank sensor or gently lever from underneath against crank pulley.
Unclip wiring from front of head with 2 E clips
Remove engine lift eye, oil filter top(easier access).
Follow wire to under inlet manifold and unclip
If it is the original sensor it will be cable tied to the cam sensor
Re-fit

Feel free to PM me if you need assisstance
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Postby sg_frost » Mon, 19 Nov 2007 22:02:02 UTC

Assuming you have a 6 pot engine with single vanos, later cars have the plug down below the air filter an the front of the inlet manifold.

BMW obviously realised how many were faulty and made changing them easier :lol:
Full time BMW nut
E46 320d Touring, silver Written off
E46 320d Touring, blue sold
Running a E91 325d M sport touring, silver
Rally a E36 318ti compact in Dakar yellow, M42 engine, 320d crank, M3 pistons, 2.1Litre of fun,now sold :(
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Postby Phatjap » Wed, 21 Nov 2007 21:08:51 UTC

Hi there

Yes shes 6 pot ok!!

Thanks for the tips, I'm going to look for the sensor next weekend if its not too cold(Im going to visit inlaws in Cornwall this weekend) Does anyone know a inxepensive online shop that I might be able to purchase one from?

Regards.
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Postby m330d » Wed, 21 Nov 2007 23:10:48 UTC

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