Diff input seal

[VRSteve]

Under the car today taking the back boxes off (shitty job) and noticed I have a leak from the diff.

It looks like its coming from the input seal.

Has anyone done one, or had one done??

Ta!

 

[mr wilks]

On the ZM i recently sold i had the passenger side diff seal done , boxes off as you will know , iirc it cost me around £150 total at my BM indy

 

[VRSteve]

On the ZM i recently sold i had the passenger side diff seal done , boxes off as you will know , iirc it cost me around £150 parts + labour at my BM indy

Any idea how long it took them??

 

[mr wilks]

On the ZM i recently sold i had the passenger side diff seal done , boxes off as you will know , iirc it cost me around £150 parts + labour at my BM indy

Any idea how long it took them??

Total 2-3 hours i believe / from memory i think the parts were £60? - £70?

 

[VRSteve]

On the ZM i recently sold i had the passenger side diff seal done , boxes off as you will know , iirc it cost me around £150 parts + labour at my BM indy

Any idea how long it took them??

Total 2-3 hours i believe / from memory i think the parts were £60? - £70?

Thats not so bad.

Thank you!

 

[mr wilks]

Any idea how long it took them??

Total 2-3 hours i believe / from memory i think the parts were £60? - £70?

Thats not so bad.

Thank you!

He's ex BMW of 20yrs (master tech) so most likely routine for him .

 

[srhutch]

I think the output seals are a bit easier to do than the input seal. I'm going to check mine before it gets driven again and give it all a good clean up underneath.

 

[VRSteve]

I think the output seals are a bit easier to do than the input seal. I'm going to check mine before it gets driven again and give it all a good clean up underneath.

Looks easy enough, dropping the x-pipe I think will be the pain, the rest looks straight forward

 

[srhutch]

I think the issue is getting the pre load right. How hard that is I don’t really know.

 

[VRSteve]

I think the issue is getting the pre load right. How hard that is I don’t really know.

From what I've read, people mark the nut location in respect to the input shaft and return the nut to that position on re-fitting.

 

[GuidoK]

From what I've read, people mark the nut location in respect to the input shaft and return the nut to that position on re-fitting.

That is the normal procedure when you're just changing out the seal.

 

[Attilio]

Under the car today taking the back boxes off (sh***y job) and noticed I have a leak from the diff.

It looks like its coming from the input seal.

Has anyone done one, or had one done??

Ta!

Hello VRSteve,

Had the same problem recently and got it done by dealer; I understand it takes approx 3 hrs and it ended up being quite expensive because of labour. Can share details via PM if interested.

 

[VRSteve]

Under the car today taking the back boxes off (sh***y job) and noticed I have a leak from the diff.

It looks like its coming from the input seal.

Has anyone done one, or had one done??

Ta!

Hello VRSteve,

Had the same problem recently and got it done by dealer; I understand it takes approx 3 hrs and it ended up being quite expensive because of labour. Can share details via PM if interested.

If You wouldn't mind dropping me a PM that would be great.

Thank you very much

 

[Attilio]

Under the car today taking the back boxes off (sh***y job) and noticed I have a leak from the diff.

It looks like its coming from the input seal.

Has anyone done one, or had one done??

Ta!

Hello VRSteve,

Had the same problem recently and got it done by dealer; I understand it takes approx 3 hrs and it ended up being quite expensive because of labour. Can share details via PM if interested.

If You wouldn't mind dropping me a PM that would be great.

Thank you very much

PM just sent

 

[VRSteve]

Hello VRSteve,

Had the same problem recently and got it done by dealer; I understand it takes approx 3 hrs and it ended up being quite expensive because of labour. Can share details via PM if interested.

If You wouldn't mind dropping me a PM that would be great.

Thank you very much

PM just sent

Got your mail and replied.

Thank you

 

[mr wilks]

On the ZM i recently sold i had the passenger side diff seal done , boxes off as you will know , iirc it cost me around £150 parts + labour at my BM indy

Any idea how long it took them??

Just altered my original post as it was misleading , i paid around £150 all done , not parts "+" labour , that should have been parts "&" labour

 

[VRSteve]

On the ZM i recently sold i had the passenger side diff seal done , boxes off as you will know , iirc it cost me around £150 parts + labour at my BM indy

Any idea how long it took them??

Just altered my original post as it was misleading , i paid around £150 all done , not parts "+" labour , that should have been parts "&" labour

Really thinking I might just do this myself.

I feel a how to coming on!

 

[srhutch]

From what I've read, people mark the nut location in respect to the input shaft and return the nut to that position on re-fitting.

That is the normal procedure when you're just changing out the seal.

This is what I have read also. But suggestion on using an impact gun to undo the nut begs the question of how you know how many revolutions have been made.

 

[GuidoK]

^thats because you dont use an impact gun. An impact gun is afaik never used on any of the bmw procedures. Except an m52/m54 vanos overhaul but that isnt a bmw procedure.
An impact gun is a very uncontrollable tool. Its only good for removing rusty fastners because it's shocks loosen the rust.

To loosen the nut you need a special tool to hold the flange. You can buy this tool on ebay for about €50.
I have one too. this is the tool:
I dont know exactly how you call this in english (I can think of multiple names)


This is a must have tool if you do a lot of transmission work on both cars and (old) motorbikes.
You can also easily make this tool yourself.

 

[Mangozac]

We did the seals on an E36 M3 earlier in the year, with advice from some BMW technician mates. They are very skilled techs and I trust their advice without hesitation.

They mark the point and use a rattle gun, so we did the same. You can mark it in such a way as to tell how many turns is correct. This is much easier than dicking around with special tools.

By the way, OP: if you're going to do one seal you might as well do all three while the diff is off.