L/H Cam Chain Tensioner Mod

chris r · Post by **chris r** » Thu Feb 28, 2013 5:27 pm

Been reading a little about this mod recently. Without taking everything apart is there a tell tale way to tell if it has been done?

This is the first BMW I've owned, so I have no real frame of reference as to which noises etc are normal & which can be cured.

From reading this post:

http://forums.pelicanparts.com/bmw-r110 ... ioner.html

How hard can it be?

cornishflat · Post by **cornishflat** » Thu Feb 28, 2013 6:55 pm

Sorry, I can,t help with the tell tale signs..... I,d guess when it starts to rattle. But the write up on Pelican is superb so I have book marked it for future use thanks.

Dai wiskers · Post by **Dai wiskers** » Thu Feb 28, 2013 7:03 pm

It's a easy enough mod to do but you will need to balance the throttle bodies after doing it, if it has been done you will not get the couple of seconds rattle from the left pot that is normal on start up, is it worth doing? to be honest no it only rattles on start up and only for a few seconds

Hope this helps Dai

slparry · Post by **slparry** » Thu Feb 28, 2013 9:29 pm

The way to tell if it's been done is the head of the bolt is a different size. So if its not been done the bolt size on left and right are the same.. Once done the left is a different size to the right

Mike B · Post by **Mike B** » Thu Feb 28, 2013 11:00 pm

+1 yes, the bolt head is smaller on the left. i seem to remember 15mm instead of 17mm spanner.

easy, but worthwhile mod. just recently did mine.

chris r · Post by **chris r** » Fri Mar 01, 2013 8:57 am

Didn't think about the throttle bodies, that's a bit of a pain. I can't balance those myself, so I think it will be off to the shop for that particular mod.

Shame there is nobody decent to take it in West London, Jap & German in Bermondsey it may have to be.

Dai wiskers · Post by **Dai wiskers** » Fri Mar 01, 2013 9:10 am

Well i'm still not convinced it's worth doing, the rattle seems to be the tensioner hitting the adjuster not the chain hitting the chain tunnel no harm seems to be done i get no bits of ally when i do oil changes [yes i did cut a filter open on the first oil change after rebuilding my motor]

also if the rattle stops quickly it proves you have good oil pressure

Phil Thomas · Post by **Phil Thomas** » Fri Mar 01, 2013 9:11 am

chris r wrote:Didn't think about the throttle bodies, that's a bit of a pain. I can't balance those myself, so I think it will be off to the shop for that particular mod.

Shame there is nobody decent to take it in West London, Jap & German in Bermondsey it may have to be.

Balancing the throttles is dead easy...make your own manometer. Plenty of posts on all the forums.

regards to all,

slparry · Post by **slparry** » Fri Mar 01, 2013 9:15 am

just make sure you have a good fan to cool the engine down while doing it

Dai wiskers · Post by **Dai wiskers** » Fri Mar 01, 2013 9:42 am

I knew i put up how to make one was hard to find but here it is
viewtopic.php?t=16632&postdays=0&postor ... r&start=15

Mike B · Post by **Mike B** » Fri Mar 01, 2013 10:28 am

I checked the balance after I had fitted the tensioner. It was still the same. I didn't actually touch anything that would change the balance.

Is it worth doing? well it will run fine without, BUT I didn't like the rattle on start up, It's a BMW, such noises should not be tolerated LOL

People not in the know would say your engine is F@$*ed

By the way, Motorworks will sell you a second hand one for next to nothing, so why not?

chris r · Post by **chris r** » Sun Mar 03, 2013 6:12 pm

Does anyone know the BMW part number for this part is? I've found it on the Motorworks site but I wanted to try a breaker to get it a wee bit cheaper. Just want to make sure I get the right one.

Mike B · Post by **Mike B** » Sun Mar 03, 2013 7:28 pm

Motorworks is a breaker of BMW's

give them a ring, they will sort a second-hand one out for you

Phil Thomas · Post by **Phil Thomas** » Mon Mar 04, 2013 8:57 am

chris r wrote:Does anyone know the BMW part number for this part is? I've found it on the Motorworks site but I wanted to try a breaker to get it a wee bit cheaper. Just want to make sure I get the right one.

As I recall they're not that expensive, so not worth using a secondhand one.
I did the mod on my R1150RS and it was well worth it. Surprisingly on the 1100S which is actually older it doesn't rattle at all on start up.

Regrds to all,

ianbcr · Post by **ianbcr** » Mon Mar 04, 2013 1:01 pm

these are the 2x parts from motor works you need.(new prices)
ENA56922..............£35.80 INC VAT
£29.83 EX VAT

ENA88629..............£18.41 INC VAT
£15.34 EX VAT