Oil drain crush washer

[NormR]

Hi All,

Looking for the inside & outside diameters for the oil drain Crush Washer on my 1250. I want to order some online 

TIA

Norm

[Boxflyer]

It would be simple to just list the crush washer as aluminum 20x24…but there is so much more to know from this document. 

https://www.realoem.com/bmw/enUS/showparts?id=0J63-USA-11-2019-K52-BMW-R_1250_RT_19_0J61,_0J63_&diagId=02_0103

 

Lots of these are available in bulk quantities from Amazon. 
 

K52 (R 1200 RT, R 1250 RT) R 1250 RT 19 (0J61, 0J63) Engine oil / maintenance service

Select another vehicle > Service and scope of repair work > Engine oil / maintenance service

 

 

No.	Description	Supp.	Qty	From	Up To	Part Number	Price		Notes
01	Oil filter		1			11427721779	$21.84
02	Gasket ring	A20X24-AL	1			07119963340	$0.38
03	Screw plug, magnetic	M20X1,5	1			11118530317			+core
05	Screw with bush		6			11128523552
06	O-ring	27X3,2	1			07119904950	$3.10
07	Gasket ring	A16X20-AL	1			07119963252	$0.57
08	Screw plug	M16X1,5	1			07119902292	$2.83
09	Gasket ring	A12X16-CU	1			07119963132	$0.38
10	Screw plug	M12X1,5-ZNNIV	1			07119904550	$8.15
11	O-ring	11,2X1,8	1			33117695219	$1.67
12	Oil drain plug	M12X1-ZNNIVSI	1			33117705854	$14.84
13	Spark plug	NGK LMAR8D-J	2			12128532942			+core
14	Air filter element		1			13727726799
15	Boot		1			32728532636
	Handbrake lever Handbrake lever
16	Countersunk screw	ISA M4X16 A2-70	4			32727681032	$1.39
17	Boot		1			32728532966
	Clutch lever
18	PT screw	4X22	4			32728534149
19	Boot		1			32727722873
20	Motor oil ADVANTEC 5W-40	1L	X			83212365958
21	Hypoid axle oil G3	0,5L	X			83222460128
21	Hypoid axle oil G3	60L	X			83222471423
22	Transmission oil Hyspin V10	250 ML	X			21522455540
23	Radiator/antifreeze/anti-corrosion agent	1,5L	X			83512445463
24	Brake cleaner 2.0	500ML	X			83192445462
	For vehicles with National version China	Y770A=Yes
24	Brake cleaner 2.0	500ML	X			83192406954
25	Brake fluid DOT4 LV, low viscosity	1L	X			83132445461
25	Brake fluid DOT4 LV, low viscosity	250ML	X			83132467961

Notes

• +core = plus core charge (possibility of a return of the old part)

 

[PeterBaumgart]

6 hours ago, NormR said:

Hi All,

Looking for the inside & outside diameters for the oil drain Crush Washer on my 1250. I want to order some online 

TIA

Norm

 

 

I've been running a "scientific experiment" with all my sealing washers and o-rings by just cleaning them, inspecting for damage, and if none found, happily reusing.

I think my main oil drain washer is now on its 5th cycle. No indication of any leaks! (So far... Staying open minded, will report if findings change. :-)

[NormR]

11 minutes ago, PeterBaumgart said:

On my old 1st Gen FZ1 I only torqued the drain bolt to spec and NEVER used a crush washer actually! I'm trying to be a proper BMW owner now and follow all the correct protocols lol

 

I've been running a "scientific experiment" with all my sealing washers and o-rings by just cleaning them, inspecting for damage, and if none found, happily reusing.

I think my main oil drain washer is now on its 5th cycle. No indication of any leaks! (So far... Staying open minded, will report if findings change. :-)

 

[Rougarou]

People actually replace those

[lkraus]

I maintained cars, trucks, motorcycles, and mowers for hundreds of thousands of miles over 45 years before the internet informed me that crush washers should be replaced after each use.  Many of those vehicles had oil changes every 3000 miles, so some washers were reused 40-50 times. Never had a leak, even the time or two that I inadvertently installed the drain plug without a washer at all.

 

Some of the filters I've bought online came with washers, most of them are hanging on a pegboard hook over my bench.

 

 

 

[NormR]

34 minutes ago, lkraus said:

I maintained cars, trucks, motorcycles, and mowers for hundreds of thousands of miles over 45 years before the internet informed me that crush washers should be replaced after each use.  Many of those vehicles had oil changes every 3000 miles, so some washers were reused 40-50 times. Never had a leak, even the time or two that I inadvertently installed the drain plug without a washer at all.

 

Some of the filters I've bought online came with washers, most of them are hanging on a pegboard hook over my bench.

 

 

 

Damn :p

I just ordered a dozen crush washers for my 1250! I guess I will be "over compensating" and be very vigilant and use one each time I change my oil for the next few years lol

[Skywagon]

3 hours ago, Rougarou said:

People actually replace those

I thought you got a free one with every purchase of Rotella 😁

[Rougarou]

2 minutes ago, Skywagon said:

I thought you got a free one with every purchase of Rotella 😁

 

No, I just flip it over each oil change, you know, re-crush it.......I'm frugal that way.

[TEWKS]

10 hours ago, Rougarou said:

 

No, I just flip it over each oil change, you know, re-crush it.......I'm frugal that way.

Yeah, kinda just like toilet paper.   

[Hosstage]

Can the washer be annealed to return the crush function?

[Rougarou]

29 minutes ago, TEWKS said:

Yeah, kinda just like toilet paper.   

 

Not exactly, but close

 

 

[Scotto336]

Oh no, a crush washer thread!  Well, here's my 2 cents:

The objective in achieving a seal is to apply a sufficient clamping force such that the contact compressive stress (force divided by surface area) at the seal joint is higher than the pressure trying to push fluid past the seal.  Unfortunately, tightening torque can’t be directly translated into contact compressive stress due to the large, and variable contributions of friction at the washer/fastener head interface and on the threads.  Recommended torques are specifically designed to achieve sufficient clamping force without risking stripped threads.  The one potential value of using a fresh, malleable washer is that it might help address surface imperfections by forming around or into them.  So… with perfectly smooth surfaces, and equal washer dimensions, an old washer should seal just as good as a new one with equal clamping force.  Those who have reused washers forever can attest to that.  If the washer has crushed into larger surface dimensions, then the clamping contact stress be a bit less due to the larger surface area, but this area would likely be the same when first used and re-used, so no real difference.   If the casting surface is not smooth (rare these days) then a new, malleable washer would be a better choice.  So…what do I do?  My standard practice is to accidently drop the hot drain plug into the hot oil pan where the washer has a chance to join up with all the other washers at the bottom of the pan.  Then I retrieve it with a magnet and put on a new washer.

[Bernie]

I have several used, ahem experienced Crush Washers for sale for the different RT's I owned over the years. No corrosion and stored above sea level.

Plus shipping.

[wbw6cos]

What kind of warranty do you offer with those, Bernie?  (asking for a friend)

[JCtx]

Last time I changed the oil, just sanded the crush washer with grit-400 sandpaper, since I couldn't find my spare crush washers. That's an option, if caught without a new one. And yes, ordered more for future times.

 

By the way, was surprised to see the spark plug LMAR8D-J also called out for 1250s on the chart above. My '20 bike came with LMAR8AI-10s, which I just dumped for the D-Js, so I don't have to worry about the AI tips falling inside my engine. So maybe that was just in the US market? Just curious. By the way, that realoem site only goes to 2019 and 2020. Just a little behind the times. Ha ha.

[NormR]

Never thought my thread would generate so many responses :p

Absolutely a hoot to read.  

[Rougarou]

31 minutes ago, NormR said:

Never thought my thread would generate so many responses :p

Absolutely a hoot to read.  

 

That's cause many here are over thinkers and paranoid concerning maintenance. 

[TEWKS]

18 minutes ago, Rougarou said:

 

That's cause many here are over thinkers and paranoid concerning maintenance. 

If you hadn’t flipped that crush washer so many times you may of seen 200K on your RT.  

[Rougarou]

9 minutes ago, TEWKS said:

If you hadn’t flipped that crush washer so many times you may of seen 200K on your RT.  

 

I think it has more to do with not checking the air pressure in the tires regularly.

[Bernie]

13 hours ago, wbw6cos said:

What kind of warranty do you offer with those, Bernie?  (asking for a friend)

Standard BMW warranty, if they leak it must be operator error or you used the wrong oil. 

[TEWKS]

1 hour ago, NormR said:

Never thought my thread would generate so many responses :p

Absolutely a hoot to read.  

Well, it’s not an oil thread but close. What’d ya expect?  

[wbw6cos]

Maybe used crush washers are sealed well with the use of Rotella.  

[Dave_in_TX]

14 hours ago, JCtx said:

By the way, was surprised to see the spark plug LMAR8D-J also called out for 1250s on the chart above.

Interesting. However, the parts fiche at Max BMW shows the the plug to be an LMAR8-AI10.

[Rougarou]

3 hours ago, wbw6cos said:

Maybe used crush washers are sealed well with the use of Rotella.  

[JCtx]

Oh, okay; thanks. But I think that proves what you said: That they're interchangeable. And I already put them on my bike, so if it explodes, it'd be your fault. Take care.

[AviP]

On 11/22/2024 at 4:34 PM, PeterBaumgart said:

 

 

I've been running a "scientific experiment" with all my sealing washers and o-rings by just cleaning them, inspecting for damage, and if none found, happily reusing.

I think my main oil drain washer is now on its 5th cycle. No indication of any leaks! (So far... Staying open minded, will report if findings change. :-)

My Subaru has had an oil change every 6000 miles with the original crush washer. It has never leaked. I am at 221,000 miles now.

[Dave_in_TX]

On 11/24/2024 at 10:31 AM, Dave_in_TX said:

Interesting. However, the parts fiche at Max BMW shows the the plug to be an LMAR8-AI10.

I've been running LMAR8D-Js in my 2023 GS for over 30k miles without problems.

[Bernie]

6 hours ago, Dave_in_TX said:

I've been running LMAR8D-Js in my 2023 GS for over 30k miles without problems.

Well once you have done over a 100k miles in testing, let us know. 

[Scotto336]

So in conclusion,  BMW drain plug washers can last significantly longer than BMW driveshafts,  but you will have to bear the cost if they ever need replacing.