Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
What is this ?
Hi All found this on the drive after I finished doing the oil pump and cambelt change.
It may have been there a while before I did the work however thought it best to check in case its important !
Its a very thin metal washer / shim with three small locating lugs around the circumference.
3rd Jan 2022 12:11 pm
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Ill take no responses as good news then...
It could be anything, TBH my drive has loads of crap buried in the gravel.
3rd Jan 2022 6:25 pm
Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1079
Keep it in the glovebox "Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"
Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
3rd Jan 2022 6:29 pm
terryall
Member Since: 17 Jun 2011
Location: Whitstable
Posts: 1435
Is it the retaining washer on a multi tool? Do I win a biscuit? 😅
3rd Jan 2022 6:36 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73133
Key? And one of the Olympic Rings are going to be missing this winter?
3rd Jan 2022 8:27 pm
ronald.soak
Member Since: 29 Apr 2008
Location: London
Posts: 534
I had hoped that someone knowledgeable would supply the answer because I came across one of these eared shims during my last belt change and cannot remember where it was fitted.
My best guess is in the fan mounting, first choice being between the fan viscous coupling and the drive pulley.
I am afraid that it's not going to come back to me but if you could measure and post the hole size somebody may be able to rule out that suggestion and narrow down alternatives.
1 alternative behind an auxiliary belt tensioner?
Bad news is that is it is almost certainly linked to your recent work. The good news is that it is very much more likely to be linked to the auxiliary drive rather than the timing area.
I cannot see it being disastrous. Just keep it safe because getting another one could be difficult.
John
3rd Jan 2022 11:06 pm
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23866
DiscoMikey would be the man to ask. Hopefully he’ll see this post or you could drop him a PM.2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography (now semi-retired)
3rd Jan 2022 11:52 pm
ronald.soak
Member Since: 29 Apr 2008
Location: London
Posts: 534
I remember being concerned that the lugs might not be correctly located because they were obscured from view when the component was fitted.
I feel that the ears are to hold the shim in place whilst a mounting bolt is fitted because a washer could not be positioned. Perhaps fitted between the alternator and it's bracket?.
Hopefully DiscoMikey or Flack will know.
John
4th Jan 2022 12:14 am
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20855
It sits inside the crank pulley, against the end of the crank...
Is it important? No idea, but I'd assume its there for a reason My D3 Build Thread
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Disco Mikey, So I guess I need to take it all apart again
Gutted !.
4th Jan 2022 10:49 am
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Disco_Mikey wrote:
It sits inside the crank pulley, against the end of the crank...|
DM do you mean the timing belt pulley or the auxillary belt pulley ? Actually forget that clearly it would be the timing belt pulley...
.
4th Jan 2022 10:52 am
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Found this pic showing it where DM said it should be...
So I guess I need to get the spanners out again.
At least this time I dont have to remove the alternator / bracket.
4th Jan 2022 12:23 pm
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Back in its place...
So the offending shim has been reunited with the pulley.
Safe to say it was a lot quicker getting it all apart again. 2 hours and then I need to wait for a new Crank bolt to arrive at my local dealer to then put it all back tomorrow.
I know it probably won't make any difference but my brain would not let me relax till it was done.
4th Jan 2022 3:42 pm
Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1079
"Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"
Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
4th Jan 2022 3:54 pm
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Just to follow up on this was speaking to a friend who is a Mechanic, this washer is called a Diamond Coated Washer and is used to increase friction between the pulley and crank. So very glad I went to the trouble of putting it back in now 👍
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