Author Topic: Timing Chain (Read 3176 times)

nicknikolovski · « **on:** March 07, 2008, 06:01:30 PM »

Hi guys, I've got a 93 318is Coupe M42

Just wondering after I replaced my timing chain, cam, crank and idler gears, all guides as well and tensioner, My engine seems to be making a whinning noise when you accelerate and decelerate using engine braking. It is most noticeable from 1500-3000 RPM and at about 20-40km/h. And mainly when the engine is warming up.

Could this noise be the fact the chain just needs to wear in with the components? I am also using Mobil 1 Fully Synthetic 5W30 oil. Next change I'm going back to 10W40 (ran better). Since chain replacement I've only done 1000km. I hardly drive the car only twice a week.

Oh, and also the noise is similar to a timing belt being tensioned slightly too tight. I had a mechanic tell me that the chain just needed wearing in.

Any advice would be great.
Thanks, Nick

318is93 · « **Reply #1 on:** March 07, 2008, 08:45:46 PM »

Did you replace the rails and sprockets too?

nicknikolovski · « **Reply #2 on:** March 07, 2008, 10:06:49 PM »

I replaced the following:
Timing Chain, All 4 Rails, Cam Sprockets, Crank Sprocket, Deflection Wheel, Upper & Lower Gasket, Crank Seal, Cam Sensor O Ring, Tensioner, Crank Bolt, Water Pump, Thermostat, O Ring, & Housing Gasket & All 3 Belts.

The engine itself runs smoothly.

RED IS 91 · « **Reply #3 on:** March 08, 2008, 06:04:20 AM »

Where did you get your parts ,especially your sprockets ??

nicknikolovski · « **Reply #4 on:** March 08, 2008, 06:25:32 PM »

I got my parts from Pelican Parts - the sprockets are all genuine BMW.

It could just be me thinking it sounds different but their might not be anything wrong. It's actually gotten better. I drove it yesterday, and sounds very good.

Thanks for your help and comments. I'll just drive it more and see how we go.

sheepdog · « **Reply #5 on:** March 09, 2008, 11:50:54 AM »

It may just need to settle in.

bmwpower · « **Reply #6 on:** March 10, 2008, 08:55:50 AM »

I just did my M30 and my M42 timing chain. They all make a little whine when new. Just give it some running time and it should be fine.

nicknikolovski · « **Reply #7 on:** March 11, 2008, 02:35:40 AM »

Thanks guys, appreciate all the info and help.