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Under the lift arms
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Discussion Starter · #1 ·
So as we all know the m62Tu is pretty prone to that nice diesel sound on start up,

I know ive been dealing with it for over ten years,
before i did my chains, and right after i did my chains

and still on and on

but ive noticed something, at 264,000 miles after my last oil change, Ive got a little "lifter" tap *its definitely new sound and was not there prior to my oil change i did a few weeks back

BUT, what also came with that little new noise, is a much longer start up rap

the start up rap was always, 1-2 seconds *the length of say one to one and a half full rotations of the chain and cams

I did replace the main tension'er a few years back, Im thinking about doing it again,

is that a every 4-5 year part?

Now the start rap last a good 3-5 seconds *it sounds much more unhealthy

I suppose i should investigate my oil filter house,

between the tap, and the rap im thinking the car is telling me to let go
 

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It’s the vanos o-rings. I had the same startup rattle years ago. I changed the guides, replaced the tensioner, and the cam to cam chain pads, etc. What I didn’t do was change the vanos o-rings.
Then I took it apart again a year later and replaced the vanos o-rings, startup knock was gone.
Since then I’ve been doing vanos o-ring replacements.
If your interested in getting a set with new Beisan o-rings shoot me a message, I’m a lot less expensive than the Dr. guy. At the moment I have 5 sets of vanos on my workbench to be fixed.
More info and pics here.
 
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If it is only (or predominantly) during cold start, then yes, a new INA brand main tensioner could reduce or eliminate the start up noise. I replaced my previously updated tensioner and noticed that spring had lost about 1cm or more of length from 70k of use. I new one reduced the frequency and intensity of the start up knock. As Jim suggests Vanos rebuild helps as well. I have done both and that basically eliminated the start up knock
 

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Another vote for vanos. I was going to buy some rebuilt ones from jimlev but I bought all the tools and seals when I got that last socialism check. I plan on doing them in the next few months.
 

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Another vote for vanos. I was going to buy some rebuilt ones from jimlev but I bought all the tools and seals when I got that last socialism check. I plan on doing them in the next few months.
Let us know how it goes. Hope you got a big ass vise.
 

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What vice does he need to cultivate? I hope he has his wife on board!
 
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I have several. Guns and cars being the most expensive.....yeah Im gonna do the torquing at work. I have a big vice but I haven't built a bench to mount it to yet(only been at the new house for 2 years) as for timing tools I got a chinese set, however I have heard the tool to set the cam sensor wheel is junk so I got the tools for that from german auto soloutions. I still need to get the upper timing cover gaskets. I think I have everything else along with new vanos check valves. My tensioner is only a few months old because I tryed that first before accepting it was the vanos.
 

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2001 BMW E39 540i Automatic Sedan, 195 K miles
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So as we all know the m62Tu is pretty prone to that nice diesel sound on start up,
.....
I did replace the main tension'er a few years back, Im thinking about doing it again,
.....
Definitely, first, I'd replace the spring of the tensioner, as a quick fix.
(The only difference between the old and new tensioner is the length and strength of the spring)

So, I'd remove the spring inside the tensioner's., and replace it with a similar but a bit longer and thicker spring that you can get from any hardware store, dip it in oil then insert it in the tensioners. And reinstall the tensioner.

I do this once a year on my car. And it quiets down the engine's cold start up diesel rattle pretty good.
 

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Under the lift arms
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Discussion Starter · #10 ·
new tension'r is in

couple of cold starts and i should know
 

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Under the lift arms
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Discussion Starter · #12 ·
5 years... Im not looking to fix the start up rap...

Im looking to fix the extended startup rap which recently developed
the vano's units where replaced when i did the chains, ten years ago (*im not taking the timing apart again)

Ill sell
 

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the vano's units where replaced when i did the chains, ten years ago (*im not taking the timing apart again)
Come on man, just do it. Your not chicken RU? just kidding
 
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Under the lift arms
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Discussion Starter · #14 ·
naw its ok... your right... Chicken is a good explanation lol

I just dont want to do it again, Im tired of this.. Im tired of my hands always looking like this and I guess i like my n62 more then my m62

Ive been wrenching for 25 years, my body hurts... Im half way to black belt..

@ 265,000 miles I will let go of the car before i take the front apart again,

besides honestly i want to get another 3 series but in a 4 door Xdrive *the 540 deserves better then to be a daily beater

(*and when i say beater, thats better then most peoples new car)

but the 540 is a sport, and the 550 is a Mtech


find out in 20 min when i go outside,

the 540 is sleeping outside now... Isnt that a indication its time?
 

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Under the lift arms
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Discussion Starter · #16 ·
your confusing the n62 with the s85

the s85 had bottem end problems
 

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naw its ok... your right... Chicken is a good explanation lol

I just dont want to do it again, Im tired of this.. Im tired of my hands always looking like this and I guess i like my n62 more then my m62

Ive been wrenching for 25 years, my body hurts...
I hear ya. I’ve been wrenching much longer but not to earn a living.
My thumbs look like they went thru a meat grinder.
Can’t wait until I get the hotrod finished so they can heal.
 

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Under the lift arms
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Discussion Starter · #18 ·
All good.. No start up rap this morning, or after work

I did not expect a tensioner to need to be replaced to soon but I guess Ill add that to the list of things to replace just cause,

Guess the e39 gets another life lol
 

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That’s good to hear, hopefully it will last. What did your old spring look like?
Even after I did the guides and the tensioner I still had the rap. It never went away until I did the vanos o-rings.
 

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Under the lift arms
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Discussion Starter · #20 ·
after i did the guides and and chains, and tensioners i still had the rap.. BUT i had done the vanos units

I just assumed it was normal engine,

I wounder what the shelf life on the vannos units are... Im about ten years out since that job
 
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