Oil Pump Chain Part Numbers

[2002#3]

I , too, was a victim of a non-BMW, incorrectly packaged, wide OP chain, in this case, Fibi.  

I have a possible source for a "real" BMW OEM (likely narrow) ---140 chain.  I want to improve my chances of receiving a narrow chain.  

What is/are the difference(s) in these oil pump chains, both of which are shown in all the parts diagrams?  Same length?  Application?  Both same width?

• 11 41 0 652 140 
• 11 41 1 716 989 

Thanks.

Larry

Edited December 18, 2022 by 2002#3

[jimk]

The one I'm looking at in the box, IWIS part no 50000082 KFZ, made in Germany and BMW part number labeled 11-41-1-716-989 is the real deal continuous chain (no master link).

[2002#3]

Great help, Jim.  Thank you.

Larry

[MurphinDC]

Did you check Bluntech?

 

BluntTech Industries • M10 Oil Pump Chain

WWW.BLUNTTECH.COM

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Reproduction M10 Oil pump chain. There are a lot of incorrect chains on the market right now, this reproduction from MVP is the correct 5mm width.

 

[tech71]

 I suspect the 140 PN is for the shorter 44 link chain used on early engines equipped with a gear type pump.

MVP is now offering an oil pump chain in the correct configuration

 

Manufacturer of Vintage Car Parts,MVP,BMW2002,BMW,bmwclassiccars,bmwclassic,bmw2002classic,bmw02club,mvpvintageparts,recreate a legacy

WWW.MVPVINTAGEPARTS.COM

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Manufacturer of Vintage Car Parts,MVP,BMW2002,BMW,bmwclassiccars,bmwclassic,bmw2002classic,bmw02club,mvpvintageparts,recreate a legacy

 

Edited December 18, 2022 by tech71

[2002#3]

Thanks, tech and Murphin.  I will check with Blunt and MVP tomorrow.

 

[mvliotta]

Here is the difference visually..

[2002#3]

Thanks, mv.

At the risk of clogging my own original post more, I have attached 3 additional photos which might help someone choose the correct OP chain.  Photos 1 and 2 are both OP chains on an original OP sprocket.

 

 

 

[tech71]

To further muddy the waters, I reused the oil pump chain in my last engine.

It had no discernible wear and as for any possible stretch..thats what shims are for.

I did however install new sprockets top and bottom. Seems thats where most wear occurs.

[jimk]

worn chains (increased link pitch) wear the sprockets by only pulling on the last tooth before lifting off.

[2002#3]

Jim, can you tell if the above sprocket teeth look worn?  They have been working hard for 46 years.

[jimk]

Is that dirt in pic with the ruler scale or is the sprocket gouged?  I decide which from the pic.

If the sprocket is worn badly, the wear can be seen on the teeth where the roller rubs as the chain leaves the sprocket.

[2002#3]

Thanks, Jim.

Yes.  Dirt.  Does not look as if the rollers have caused any wear.  Teeth do not appear to be shorter, or worn in line with the sprocket plane, just beveled in a little from the sides at their tips.  I have seen others worn kinda like this.  Maybe a new chain also is beveled like this, too.  Dunno.  Would a better photo help?

[mvliotta]

Here’s a pic of my worn sprocket for reference:

 

[jimk]

The wear on the sides of the teeth is no big deal, the teeth valleys between the teeth where the work is done looks good.