Timing Chain Seal Size

[BL92]

Is BMW supplying the wrong seal?

check the pics and if someone else can measure theres for me would be great

I have replaced the whole unit with another new seal and still leaks

i am up from 70nm to now 85nm on the torque wrench

still leaking

my next option is a bonded washer

[sapote]

I have replaced the whole unit with another new seal and still leaks

i am up from 70nm to now 85nm on the torque wrench

make sure the sealing surface of hole on the timing cover is cleaned. Add a thin coat of seal on both side of the crush washer can help.

[chris719]

make sure the sealing surface of hole on the timing cover is cleaned. Add a thin coat of seal on both side of the crush washer can help.

Drei bond ok?

[BL92]

Thanks for helping i am committed to see if this will fix it

Found a 10 pack at the moment in the high temp Viton, keep searching in Australia before i pull the trigger on that ebay item attached

[maupineda]

Does it have the size you need?

[BL92]

The seller advised me the bonded washed OD is too big ( wont fit )

What about a copper crush washer ?

Sapote, Trying to avoid sealant due to mess / clean up etc

[ATB88]

I'm confused -- is the washer you're talking about here the washer that sits between the timing chain tensioner and the block? And are you saying that the BMW washer is not right? My understanding is that while it's finicky, it will seal properly, it just might take a few to get it right. Mine was replaced recently and it's not leaking.

That said if you're seeking a solution that is more reliable to install correctly and find one, that's great.

[BL92]

I'm confused -- is the washer you're talking about here the washer that sits between the timing chain tensioner and the block? And are you saying that the BMW washer is not right? My understanding is that while it's finicky, it will seal properly, it just might take a few to get it right. Mine was replaced recently and it's not leaking.

That said if you're seeking a solution that is more reliable to install correctly and find one, that's great.

BMW selling me dud crush washers i believe
I am trying different washers from other sellers to see if this leak stops

[maupineda]

The seller advised me the bonded washed OD is too big ( wont fit )

What about a copper crush washer ?

Sapote, Trying to avoid sealant due to mess / clean up etc

Aluminum is a softer metal, so it crushes more easily, so copper may make it worse. I got mine from a BMW dealer, but you can get them from mcmaster too. they should be similar. you can try and do some annealing to make it crush more and seal.

https://www.youtube.com/watch?v=p4cl2v62PAQ&t=247s

I was going to do this, but my final attempt worked with a new washer (maybe I had gotten a bad one) and torqued to 70NM

[maupineda]

Aluminum is a softer metal, so it crushes more easily, so copper may make it worse. I got mine from a BMW dealer, but you can get them from mcmaster too. they should be similar. you can try and do some annealing to make it crush more and seal.

https://www.youtube.com/watch?v=p4cl2v62PAQ&t=247s

I was going to do this, but my final attempt worked with a new washer (maybe I had gotten a bad one) and torqued to 70NM

But the annealing method shall get you golden, just make sure the washer and block surfaces are clean and without scorings.

[BL92]

You are right, copper wont work

Annealing is genius, Great idea man, That is what i think is the issue, they are not crushing down

I am just gonna go grab some from an auto parts store, and anneal them straight away, finally i think this will be the end of the leak

Thanks man