Another S65 engine ticking noise

DrFerry wrote

Good info, but how about oil consumption? My own experience with Mobil 1 5W50 was that when hot the oil sheared down and got thin enough to increase oil consumption (creep past the rings) using up to about 1qt every 1500miles! But that's Mobil 1 5W50 FS. Castrol 5W50 maybe different. Please let us know your experience with oil consumption using the Castrol 5W50. BE Bearings recommends 10W60 after using their increased clearance bearing shells.

omgzirra_exe wrote

My first track day at Auto Club Speedway (RIP), I was running Liqui Moly 10W-60 and the car just didn't feel happy. It ran hotter, felt lazy, and was noticeably down on power.

At lunch, I drained it and filled it with Motul 300V 5W-50. It was a winter event, so ambient temps were still favorable. As soon as I got back out on track the car felt much more responsive, especially in the upper RPM range. Ever since that day, I've stuck with 5W-50 or 15W-50, regardless of brand, just not Liqui Moly.

Assimilator1 wrote

The other day when I started my engine after being laid up a week, as well as the 'normal' rattle on start up, it was then followed by a heavy clunk which I actually felt! (shock through the car & it felt like the car jolted slightly too!). Now this has happened once before, but it was so long ago I forgot about it.

Has anyone else had this clunk & got it fixed?
That clunk is very worrying!

omgzirra_exe wrote

My first track day at Auto Club Speedway (RIP), I was running Liqui Moly 10W-60 and the car just didn't feel happy. It ran hotter, felt lazy, and was noticeably down on power.

At lunch, I drained it and filled it with Motul 300V 5W-50. It was a winter event, so ambient temps were still favorable. As soon as I got back out on track the car felt much more responsive, especially in the upper RPM range. Ever since that day, I've stuck with 5W-50 or 15W-50, regardless of brand, just not Liqui Moly.

These days I mainly run Red Line. Oil consumption has been pretty reasonable, around 1 quart every 3K - 4K miles, and that includes a little bit of oil weeping.

My oil change interval is only about 2.5K to 3K miles anyway, so consumption has never really been a concern.

FWIW, I also run E85, so I'm changing the oil more frequently regardless because of fuel dilution. I also prefer oils with a higher ZDDP content for the added wear protection due to running E85. I am also on BE Bearings.

Currently debating a RB refresh with ACL mix/match sets from Mporium.

///M Power-Belgium wrote

My S65 has the "COLD" start up clunk and rattle noises too (always had it) just like many S65 owners ..
As far as I know , DD drivers (daily driven cars) don't get the terrible clunk noise.
Sometimes it sounds bad , really bad . I mean like a "Kalashnikov" (no kidding)!
Back in time , a good friend of mine was in my garage and I started my car up (Cold)
He was frightened by the rattle and clunk noise and said : Man WTF was that ?!?!
In the beginning I was thinking , honestly this can't be healthy for my S65.
But so far so good...It didn't hurt my engine.

How to fix it ?
Just daily drive the car , and you won't get the S65 clunk and rattle noises anymore (!) My car is a garage queen , that's why I always got it .
If I drive my car 2-3 times/week , the clunk noise is completely gone ..
Just test it out , and you will see..


After all those years, I saw for once that the clunk noise is been fixed by replacing the S65 Vanos Gears .
It was a BMW PUMA case and it was posted on this forum , as you can see and read ...

Assimilator1 wrote

Interesting stuff.
One point though, I wouldn't run 15w50 if I were you, that oil will be thicker when the engine's cold & will take longer to circulate.



I remember that one now that you mentioned it, good to know they seem to keep going on fine despite the heavy clank/clunk! lol.
My M3's always been a garage queen, I couldn't really afford to daily it, hence having a 330d too. Also, I tend to not to drive at all from Monday to Thursday night .
It's weird how the clunk doesn't always happen though, I only drove it just the week before!

omgzirra_exe wrote

been at it for 7 years on between 5W50 and 15w50. i live in socal, my garage is warm at 6am. It's also my daily. every. day.

BPMSport wrote

FYI, took off AC belt, noise gone.

Assimilator1 wrote

Socal? Southern california? You have to remember that not everyone is from the US here .
What sort of temps do you get at 6am?

omgzirra_exe wrote

that was the entire point of me saying im from socal lol. you started with "I wouldn't run 15w50 if I were you"

so you assumed something did you not?

it's a heated garaged, it's pretty much room temp.

Assimilator1 wrote

PS I guess I was right about what socal stands for? You didn't answer

Assimilator1 wrote

Even if your garage was at 30C, that's still cold in terms of engine temp, and running 15w will still take longer to circulate than 10w or 5w. I don't see why you're taking that chance when you have 5w50 available.

PS I guess I was right about what socal stands for? You didn't answer

jvictormp wrote

If you want to try something new about the start up clunk, give it a start without fuel pump fuse first. Maybe the oil will have extra time to fill up the vanos gallery.