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Is this with the new chain tensioner installed?
 

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I would change the tensioner, drive the car until it's warm, then leave it overnight and take another cold start video the next day. It's not making any noise at idle or any time besides cold start, right?
 

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Discussion Starter #24
I would change the tensioner, drive the car until it's warm, then leave it overnight and take another cold start video the next day. It's not making any noise at idle or any time besides cold start, right?
Yes that’s correct only happens on cold starts after sitting overnight usually. The noise lasts for about the first 2 seconds of cold start up, then goes away during idle. I can’t duplicate the sound unless she’s been sitting for a long period of time. For example if I tried to shut the car off and repeat the start up the noise won’t happen. I’ll change the tensioner and report back
 

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Ok here it is guys. Any exprertise on what the noise Is?

Always hard to tell on the internet.

If you are referring to the sound for the first second or two, the "dieseling" sound, I would suggest VANOS. The newer cars had accumulators (2001 forward in NA?) that essentially prevented the oil from draining back, which is one of the things that can cause that sound.

It takes a lot of pressure to run the VANOS, so that first second or two is the oil building pressure to properly operate the VANOS which than operate the timing on the camshafts.

At least, that is my best guess from the 3 second video/audio.

Regards,
Jerry
 

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Discussion Starter #29 (Edited)
Always hard to tell on the internet.

If you are referring to the sound for the first second or two, the "dieseling" sound, I would suggest VANOS. The newer cars had accumulators (2001 forward in NA?) that essentially prevented the oil from draining back, which is one of the things that can cause that sound.

It takes a lot of pressure to run the VANOS, so that first second or two is the oil building pressure to properly operate the VANOS which than operate the timing on the camshafts.

At least, that is my best guess from the 3 second video/audio.

Regards,
Jerry
Yes I’m talking about the first second or two almost like a lifter tick sound? I agree with your reply. I took the car to an independent BMW specialist who knows our cars very well and always has some nice gems outside the shop! He replaced the tensioner this past Saturday I didn’t want to do a DIY. I asked him how the old tensioner looked and he said it looked fine. Idk if you can tell visually by looking at the tensioner when it’s out of the car. How ever he didn’t elaborate and did say the guides failing is a matter of when and told me to keep an eye out when I change the oil and inspect the oil filter, let the oil filter drain, open the fins ect. I really love my car despite the miles and small things it needs. I want to overhaul it little by little as a project car but I’m unsure because of the guides and carbon build up, I’d hate to refresh all my rubber bushings, suspension, clutch along with other miscellaneous things and then lose the guides idk what to do
 

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The guides is a matter of when? That's BS. Chain guide failure threads on here on not very common. Change the tensioner every 50K miles and change the oil every 5K or so and you will likely be fine.
Carbon build-up issue is even less important. You could get someone to reroute the air flow a la Sailor24 method or do what 99.99% of people do , code it out and never think about it again.
 

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The guides is a matter of when? That's BS. Chain guide failure threads on here on not very common. Change the tensioner every 50K miles and change the oil every 5K or so and you will likely be fine.
Carbon build-up issue is even less important. You could get someone to reroute the air flow a la Sailor24 method or do what 99.99% of people do , code it out and never think about it again.
Thanks for the positive reply. I just changed my oil an hour ago. I didn’t see any plastic bits in the oil and nothing in my filter either, maybe I’m just being paranoid. I do change my oil every 5k. The SAI is on my to do list. I just have to do some more research. For 212k on the original guides and current overall performance of the engine I am impressed.
 

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The plastic bits might not show up until you take things apart such as dropping the oil pan.

From your video, I cannot tell what the sounds is from.

However, from my own personal experience, my car used to make a loud rattling sound on cold startups. I ended up having my usual shop do the chain guide overhaul. They also put in all the various S62 VANOS improvements/modifications as well. The rattling sound no longer occurs.

In my case, the plastic guides were definitely broken. Some were in the bottom of the oil pan. Other bits were found around the chain guides. There was scoring due to metal on metal contact. It was a few millimetres deep. Was it in danger of imminent failure? Who knows. The car undergoes regular preventative maintenance and nothing shows up in the reports. Was it worth the money? Unclear. However, the engine is rock solid now and probably good for a long time barring anything unusual.

I agree with the recommendations others provided. If you plan to keep the car, you'll need to decide if such a major maintenance is worth it to you. I don't see any problem with putting in new parts like the tensioners and seeing if the sound goes away.
 
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