Oil Pump Chain Part Numbers

[2002#3]

Jim, I assume you're referring to my photos and not the double row sprocket above.

Here are closer views of my OP sprocket.  Thanks for examining it.

 

[jimk]

The oil pump sprocket looks to have enough wear down in between the teeth to replace.

[2002#3]

Jim, I agree.  Certainly appropriate for a rebuild with upgrades.

[tech71]

Ended up ordering one from MVP Ebay (cheapest option found) on 18 Dec, it arrived this morning 21 Dec. Thats pretty good coming from Taiwan😳

Yep its a chain, looks correct, gonna run it😁

Edited December 21, 2022 by tech71

[2002#3]

Thanks, tech. 

The two options suggested by murphinDC (thanks, murphinDC) on the previous page were good ones.  You went with MVP; I went with BluntTech.  You got yours; mine's on the way.

Larry

[tech71]

Just wondering... Has  anyone had an actual negative experience regarding the fatter S14 chain?

Any empirical evidence to back the bad press?

You know, in terms of wear, failure, noise ect?

Edited December 21, 2022 by tech71

[2002iii]

1 hour ago, tech71 said:

Just wondering... Has  anyone had an actual negative experience regarding the fatter S14 chain?

Any empirical evidence to back the bad press?

You know, in terms of wear, failure, noise ect?

I'm pretty sure the s14 chain would rattle like crazy being so loose and most likely do damage.

[tech71]

2 hours ago, 2002iii said:

I'm pretty sure the s14 chain would rattle like crazy being so loose and most likely do damage.

Sorry, thats speculation, ok conjecture then.

Not a verified observation. Thanks for playing😁

Anyone?

Edited December 22, 2022 by tech71

[2002iii]

1 hour ago, tech71 said:

 

Sorry, thats speculation, ok conjecture then.

Not a verified observation. Thanks for playing😁

Anyone?

Ok, then you should try it!

[tech71]

3 hours ago, 2002iii said:

Ok, then you should try it!

Well, I do have a couple here that I would prefer not to go to waste, thats why the request for info on actual negative results from using one.

Search so far seems to not yield much info on that .

I did however locate this thread easy enough though.

Two Faq members indicate here that long term use of these chains resulted in no ill effects

Not advocating their use, but I am saying that properly installed, it seems your engine wont explode, possible there are no adverse effects at all.

Thats why I would love to hear anyones actual negative experiences.

Dont break out the pitchforks and torches please.

Just trying to separate hype and hearsay from fact.😉

Edited December 22, 2022 by tech71

[jimk]

The wider pump chain may run to one side of the sprockets and touch the pump especially if the shafts are not perfectly parallel.  More info is needed to confirm by someone with a wide chain installed.

[bmw_e30]

maxmillion has factory correct chains in stock ready to go

 

CORRECT Oil Pump Timing Chain for all BMW M10 4cyl engines | MIC

WWW.MAX2002STORE.COM

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This oil pump timing chain is no longer available from BMW and unlike all the aftermarket brands, that do NOT fit properly, This is the CORRECT techincal design. Fits every BMW M10 4 cyl engine produced from 1960s (think 2000CS, 2002, etc) to the 1980s 318i. In stock at our SoCal...

 

[tech71]

8 hours ago, jimk said:

More info is needed to confirm by someone with a wide chain installed.

"Ive logged 3K+ miles on that engine, and have done 100s of dyno runs at WOT with it. Ive bore scoped the front case down to the oil pump drive and I see no evidence of lateral interference issues.  While I am not endorsing using the S14 chain, it appears (anecdotally), that it is not the end of the world if you use it." 

Edited September 28, 2017 by 1974_Verona

 

"I've installed the wider (S14) chain in my own engine. I noticed it came close to the Nr 1 main bearing cap, but does not interfere. I've got well over 10,000 miles on the engine now.... so far no problems... but I'd like to know what harm does this cause, and should I be replacing it RIGHT NOW, or not! 

 

Jeff? Andrew? What have you found? (and yes, I see that the crank sprocket and oil pump sprockets are different on E30 M3s.

 

Silently terrified right now." 

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Paul Wegweiser

Owner: Zenwrench

Classic BMW Specialist

[jimk]

Good to know, thanks.