13 replies [Last post]
Micha
Micha's picture
 Offline
Joined: 10/12/2007
Posts: 414

Found it at the oil pump area. Bike stood for about 4 years, was a good runner before still standing.
Any one has an idea where this sludge came from?

  • bmw1.jpg
  • bmw2.jpg
  • bmw3.jpg
  • bmw4.jpg
  • bmw5.jpg
  • bmw6.jpg
  • bmw7.jpg
__________________

Michael Steinmann
R51/3 1952
Engine Nr. 529466

Beemer100
Beemer100's picture
 Offline
Germany
Joined: 05/15/2018
Posts: 111
did you try with a magnet to

did you try with a magnet to see if it is magnetic?
I would think that this is what you find in an engine which run with engine oil with no/little detergents. I assume you found the same in the oil pan. The white is interesting. In the old days, when you opened the oil cap of an engine and it was white, there was a good chance that there was water in the oil ... here it could be condensation water ...
How do the slinger look like?

my 2 cents
Klaus

Micha
Micha's picture
 Offline
Joined: 10/12/2007
Posts: 414
Thanks. I will continue with

Thanks.
I will continue with stripping and come back for update.

__________________

Michael Steinmann
R51/3 1952
Engine Nr. 529466

Micha
Micha's picture
 Offline
Joined: 10/12/2007
Posts: 414
BTW, I used SONOL oil (local

BTW, I used SONOL oil (local brand) from the Motorex series, with description:

20W-50
API: SF/CD
MIL-L-46152B

Is it ok for my bike?

__________________

Michael Steinmann
R51/3 1952
Engine Nr. 529466

Micha
Micha's picture
 Offline
Joined: 10/12/2007
Posts: 414
I came back to update: I

I came back to update:
I opened the drain plug and was horrified to see what was coming out of there. It wasn't oil. It was a viscous fluid that could barely get out.
It had a difficult time to drip out, in heavy long sludge drips. Like honey (or snot, forgive my French).
The magnet in the drain plug was free of metal dust.
My question: Is this a normal behavior of used oil that was sitting inside a disabled motor for 4-5 years?
Engine went through a re-bore with new pistons before I stopped riding it, and oil was changed once a year: First I used 40 oil and then, when it was difficult to find, I switched to the 20W-50.
Or is there maybe another problem?

__________________

Michael Steinmann
R51/3 1952
Engine Nr. 529466

schrader7032
schrader7032's picture
 Offline
VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6973
The API rating CD means that

The API rating CD means that the oil is formulated for use in diesel engines. A website also mentions gas engines, too. But as I mentioned somewhere else, diesel engine combustion is different than gas engines and I would not entertain the notion of using a diesel engine oil in any of my gas-only vehicles. This could be one reason for the sludge in my opinion.

__________________

Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

Micha
Micha's picture
 Offline
Joined: 10/12/2007
Posts: 414
Oh no. Now I see what is

Oh no.
Now I see what is written on the oil canister: It is mentioned to be used in passenger cars with petrol and/or diesel motors Sad
Well that explains a lot.
And the fact that the used oil was standing for 5 years has nothing to do with this strange phenomena?

__________________

Michael Steinmann
R51/3 1952
Engine Nr. 529466

schrader7032
schrader7032's picture
 Offline
VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6973
Well, standing for that long

Well, standing for that long can't be good. I'm sure there were other factors. Condensation. The oil had contaminants in it when the bike was put up.

__________________

Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

Micha
Micha's picture
 Offline
Joined: 10/12/2007
Posts: 414
Will 20W-50 oil but with a

Will 20W-50 oil but with a petrol engine rating - be good?

__________________

Michael Steinmann
R51/3 1952
Engine Nr. 529466

schrader7032
schrader7032's picture
 Offline
VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6973
I would think that a gas

I would think that a gas engine only oil with an API rating of SG/SH would be fine.

__________________

Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

miller6997
miller6997's picture
 Offline
VBMWMO #6997
Joined: 10/27/2006
Posts: 1112
20W-50

I used Castrol GTX 20-50 for decades with no ill effects. I only switched to Valvoline 40W very recently because Vech recommended it and because I was bored.

__________________

Jon Miller
'67 R69S
'13 F800GT
Altadena, California

Micha
Micha's picture
 Offline
Joined: 10/12/2007
Posts: 414
Thanks. I also heard horror

Laughing

Thanks.
I also heard horror stories about the damage modern oils have done to our old engines. Do you have any mistakes or information to teach us?

Someone in the engine oil field gave me a tip to go with MOTORBIKE 4T 10W30 oil.
What do you guys think?

__________________

Michael Steinmann
R51/3 1952
Engine Nr. 529466

schrader7032
schrader7032's picture
 Offline
VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6973
Is 10w30 OK for your bike?

Is 10w30 OK for your bike? Seems like it should have a higher multi weight beyond 30...possibly 40.

Amazon shows the specs for this oil to be API; SL; JASO; MA2. The SL rating is troublesome, but I did some testing of a range of oils a number of years ago. I did test Liqui Moly Motorbike 4T 20w50. It had mid level amounts of ZDDP, a total of about 1700. There were handful of oils tested with about those numbers. Only the Spectro product, along with BMW's oil sold at the time and Valvoline VR1 had ZDDP levels over 2000.

I don't know where the 4T 10w30 is in terms of ZDDP.

__________________

Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

mcsherry1328
mcsherry1328's picture
 Offline
VBMWMO #1328
Madison, WI
Joined: 10/27/2006
Posts: 122
Oil

Just use Valvoline VR1 40 weight and you will be totally satisfied with the oil performance . You can buy it at NAPA auto supply stores.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.