Author Topic: Cam chain jump guard  (Read 6864 times)

0 Members and 1 Guest are viewing this topic.

Offline TomL

  • Hero Member
  • *****
  • Posts: 2680
  • Karma: +38/-4
    • View Profile
  • My K bike model:: K1300S
  • Location:: Hertfordshire
Cam chain jump guard
« on: February 27, 2015, 12:15:59 am »
This is a copy of the information I posted on the old EuroKClub forum about the problem I encountered when my cam chain jumped after I had filled up with petrol after a weekend in Wales.

BMW K series slant four engine cam chain jump guard.
Those of you with BMWs with the K40-K43 engines (K series slant four engines) should by now be aware of the problems caused by the camchain climbing around the crankshaft sprocket as shown in this photo of my engine.


As I have grown older, I've learned that pleasing everybody is impossible, but pissing everyone off is a piece of cake.

Offline bobtail

  • Hero Member
  • *****
  • Posts: 697
  • Karma: +10/-0
    • View Profile
  • My K bike model:: K1200S (05) departed but well loved! Now R1200RS I am now a Boxerboy.
  • Modifications and add-ons:: I had no bling on my K12 and was proud of it! And it never, ever let me down, honest! And it still had the o.e. battery going strong, honest!
  • Location:: North Wales only just near Chester
Re: Cam chain jump guard
« Reply #1 on: February 27, 2015, 09:25:56 am »
Paul, wasn't that rectified as a standard recall?

Bob
Are we there yet? I said ARE WE THERE YET? I SAID ARE WE THERE YET?!!

Offline Costas

  • Hero Member
  • *****
  • Posts: 4079
  • Karma: +61/-1
  • Riders drive K, a Hawk flies, both are fast
    • View Profile
  • My K bike model:: K1300S
  • Modifications and add-ons:: BMW Motorrad rider and pillion HP4 pegs,10-30 lit tank bag, System 5 intercom helmets. MRA tinted screen. Evo air filters. TechSpec tank pads. MIZU lowering dogbone system. B2 accelerator. Wunderlich adjustable levers, hub , brake caliber protectors, duolever bold protector, 6 lit tail bag. Turatech ABS Sensor protectors. IDE bars. Rizoma rear led signal lights, bar ends with lever protectors, paralever arm. Sargent complete system seat (pod, pillion backrest). Shrodie side badge led signal lights two modes. T Bag tail 15-25lit bag, 5 lit tank bag. LED lights 2X35W 3000k high beam, 10W parking two modes. Tracker. Metisse front wheel protector sliders. R&G water pump protector, cardan protector. Ilmberger carbon set. Ztechnic tank protector,
  • Location:: Athens, Greece, KS-Loutsa 37°58'16.6"N 23°59'06.8"E 37.971269, 23.985224
Re: Cam chain jump guard
« Reply #2 on: February 27, 2015, 10:06:52 am »
Is was a recall but not a standard one, was left to local dealers world wide to have their back in the shop for the guard installation. So it appears that even today we have issues, it is still a very valuable info and anyone riding  a K bike should check with his dealer if the bike has undergone that recall.
Embrace the wind.

Offline bobtail

  • Hero Member
  • *****
  • Posts: 697
  • Karma: +10/-0
    • View Profile
  • My K bike model:: K1200S (05) departed but well loved! Now R1200RS I am now a Boxerboy.
  • Modifications and add-ons:: I had no bling on my K12 and was proud of it! And it never, ever let me down, honest! And it still had the o.e. battery going strong, honest!
  • Location:: North Wales only just near Chester
Re: Cam chain jump guard
« Reply #3 on: February 27, 2015, 10:28:09 am »
Costas I do remember my dealer doing it when it went in for it's annual service maybe I've just got a very conscientious dealer.

Bob
Are we there yet? I said ARE WE THERE YET? I SAID ARE WE THERE YET?!!

Offline Phmode

  • Administrator
  • Hero Member
  • *****
  • Posts: 9060
  • Karma: +71/-16
  • I am the evil webmaster, do not cross me!
    • View Profile
  • My K bike model:: BMW K1300S 2012
  • Modifications and add-ons:: Sargent Seat, Powerbronze Screen, Akrapovic Silencer, Ilmberger Hugger, K12S Black Top Yoke, Helibars, Cruise, Centre Stand, Sidestand Extender, Full 3M Film, Barkbusters Hand Guards in winter.
  • Location:: Ledbury, Herefordshire
Re: Cam chain jump guard
« Reply #4 on: February 27, 2015, 11:23:06 am »

Offline TomL

  • Hero Member
  • *****
  • Posts: 2680
  • Karma: +38/-4
    • View Profile
  • My K bike model:: K1300S
  • Location:: Hertfordshire
Re: Cam chain jump guard
« Reply #5 on: February 27, 2015, 11:52:16 am »
My bike does have the latest tensioner fitted but it still jumped.

My bike started to rattle at start up and while I was at the dealers having another recall done, I asked the mechanic about the rattle on start up. You guessed it, he said "they all do that, nothing to worry about". Not being happy about it, I googled and found out what was causing the rattle and went back. They agreed to fit the new style tensioner with oil reservoir. They rectified the rattle by taking some shims out of the old tensioner with the excuse that they couldn't get hold of a new tensioner. I insisted and they fitted the later tensioner the following week.

I read about the cam chain jump guard on the internet and asked about it at the dealers. They hadn't heard of it. I went back to the dealers with the part number of the guard and they said that it had been discontinued. A few months after that my cam chain jumped. So much for the dealers. I'm so glad that I don't have to take my bike into a main agent for servicing or repairs.

It should be noted that on the first K1200S engines the crankshaft sprocket was bolted to the end of the crankshaft and was replaceable. On my engine it is part of the crankshaft meaning that when it is worn out the only way to replace it is to fit a new crankshaft. Good design??

For some reason the cam chain jump guard was never a recall and was replaced surreptitiously when bikes went in for servicing. What is that all about??
« Last Edit: February 27, 2015, 11:54:37 am by TomL »
As I have grown older, I've learned that pleasing everybody is impossible, but pissing everyone off is a piece of cake.

Offline Phmode

  • Administrator
  • Hero Member
  • *****
  • Posts: 9060
  • Karma: +71/-16
  • I am the evil webmaster, do not cross me!
    • View Profile
  • My K bike model:: BMW K1300S 2012
  • Modifications and add-ons:: Sargent Seat, Powerbronze Screen, Akrapovic Silencer, Ilmberger Hugger, K12S Black Top Yoke, Helibars, Cruise, Centre Stand, Sidestand Extender, Full 3M Film, Barkbusters Hand Guards in winter.
  • Location:: Ledbury, Herefordshire
Re: Cam chain jump guard
« Reply #6 on: February 27, 2015, 01:11:08 pm »
....and my dealer at the time recommended I have the tensioner fitted (at my cost) whilst it was in for service. They also fitted the guard FOC as a tickler for past sins on their part. Subsequently BMW authorised the dealer to re-imburse me for the cost of the tensioner.

Brian (who thinks the whole sorry tale was and still is, a debacle of mind-numbing enormity)

PS My comments were for the benefit of the wider community Tom. I had read your tale on the old site.

PPS As the chain must rub against the guard at some point in its life, one wonders if it is a serviceable item in future years or are BMW not expecting any of our bikes to be around that long.

PPPS What year did the one-piece crank assemblies arrive? Mine is an Oct 2004 so should be OK!

Offline chriscanning

  • Hero Member
  • *****
  • Posts: 1160
  • Karma: +27/-4
    • View Profile
  • My K bike model:: K1200r Sport
  • Modifications and add-ons:: BST's Wilbers Kehedo Rexxer Puig Akra
  • Location:: Junction 7 M6
Re: Cam chain jump guard
« Reply #7 on: February 28, 2015, 09:33:21 am »
When you guys have a minute google BMW 330D cam chain problem I only stumbled across this while looking for one it's seems to be in BM's DNA  ::)

Offline Phmode

  • Administrator
  • Hero Member
  • *****
  • Posts: 9060
  • Karma: +71/-16
  • I am the evil webmaster, do not cross me!
    • View Profile
  • My K bike model:: BMW K1300S 2012
  • Modifications and add-ons:: Sargent Seat, Powerbronze Screen, Akrapovic Silencer, Ilmberger Hugger, K12S Black Top Yoke, Helibars, Cruise, Centre Stand, Sidestand Extender, Full 3M Film, Barkbusters Hand Guards in winter.
  • Location:: Ledbury, Herefordshire
Re: Cam chain jump guard
« Reply #8 on: February 28, 2015, 09:40:48 am »
Er, yes! While looking for the supplier of the manual adjuster I was amazed at how many BM threads there were for cars with the same problem!

Brian (who can imagine the conversation in the BMW boardroom when they wanted to change their biking demographic; 'we'll get the car boys to do it, they know a thing or two about sporty motors'

Offline TomL

  • Hero Member
  • *****
  • Posts: 2680
  • Karma: +38/-4
    • View Profile
  • My K bike model:: K1300S
  • Location:: Hertfordshire
Re: Cam chain jump guard
« Reply #9 on: February 28, 2015, 02:03:12 pm »

PPPS What year did the one-piece crank assemblies arrive? Mine is an Oct 2004 so should be OK!

It is not clear from any of the parts lists available to us when the one piece crank started. I've only just realised that the Rainbow parts list does not delve into details such as the actual year of the bike.
As I have grown older, I've learned that pleasing everybody is impossible, but pissing everyone off is a piece of cake.

Offline gramey

  • Full Member
  • ***
  • Posts: 223
  • Karma: +6/-1
    • View Profile
  • My K bike model:: K1200S
  • Location:: Ipswich, Suffolk
Re: Cam chain jump guard
« Reply #10 on: March 20, 2015, 09:12:40 pm »
Having bought my bike last Saturday I phoned BMW as although the service book is stamped there were no past invoices with the bike which had been serviced at the Emergency Services workshop in London. BMW told me it had not been for four recalls which as they described them to me were , cam chain guides ( not sure if he meant the tensioner or the jump guard referred to here), something to do with the fuel pump, a rear suspension relay link?, and a something to do with the brake reservoir. Having read about the rear wheel flange recall I asked them and they said BMW would write to me about the rear wheel flange if it affected my bike.

Sorry I've gone off topic a bit but how do I check if I have the later cam chain tensioner, it's going into the dealers next Tuesday?  :)

Offline chriscanning

  • Hero Member
  • *****
  • Posts: 1160
  • Karma: +27/-4
    • View Profile
  • My K bike model:: K1200r Sport
  • Modifications and add-ons:: BST's Wilbers Kehedo Rexxer Puig Akra
  • Location:: Junction 7 M6
Re: Cam chain jump guard
« Reply #11 on: March 20, 2015, 10:14:37 pm »
Blimey where do we start ;) having seen your posts on the American site the paint you need you can get from here.

http://www.rsbikepaint.com/en-gb/colours.php

It will probably be the tensioner and the jump guard and until you have both I wouldn't be overly keen on using the bike.

The new Tensioner will look like this



You can take the cover off the side to check for the jump guard but little point as the chances are you haven't got it.

The rear suspension is this it isn't actually but that's what they change because water can get in behind the photo is the Sandbar version.



But to cure 'Tank' feel of a stock K make sure you have 55 rear tyres and a set of these or similar

http://www.sandbarcomposites.co.uk/displayproduct.php?product_id=645&category_id=120

The fuel pump is no big deal and as for maybe having a dodgy flange Ooh Errr you can check that yourself but BM UK get through stuff like that fairly quickly
« Last Edit: March 20, 2015, 10:47:39 pm by chriscanning »

Offline TomL

  • Hero Member
  • *****
  • Posts: 2680
  • Karma: +38/-4
    • View Profile
  • My K bike model:: K1300S
  • Location:: Hertfordshire
Re: Cam chain jump guard
« Reply #12 on: March 20, 2015, 10:30:02 pm »
Having bought my bike last Saturday I phoned BMW as although the service book is stamped there were no past invoices with the bike which had been serviced at the Emergency Services workshop in London. BMW told me it had not been for four recalls which as they described them to me were , cam chain guides ( not sure if he meant the tensioner or the jump guard referred to here), something to do with the fuel pump, a rear suspension relay link?, and a something to do with the brake reservoir. Having read about the rear wheel flange recall I asked them and they said BMW would write to me about the rear wheel flange if it affected my bike.

Sorry I've gone off topic a bit but how do I check if I have the later cam chain tensioner, it's going into the dealers next Tuesday?  :)
Take a look at the photos at the start of this post and I explain how to check if you have a cam chain jump guard fitted. The tensioner will require attention if there is a clatter on start up that goes away after a few seconds. 
As I have grown older, I've learned that pleasing everybody is impossible, but pissing everyone off is a piece of cake.

Offline Phmode

  • Administrator
  • Hero Member
  • *****
  • Posts: 9060
  • Karma: +71/-16
  • I am the evil webmaster, do not cross me!
    • View Profile
  • My K bike model:: BMW K1300S 2012
  • Modifications and add-ons:: Sargent Seat, Powerbronze Screen, Akrapovic Silencer, Ilmberger Hugger, K12S Black Top Yoke, Helibars, Cruise, Centre Stand, Sidestand Extender, Full 3M Film, Barkbusters Hand Guards in winter.
  • Location:: Ledbury, Herefordshire
Re: Cam chain jump guard
« Reply #13 on: March 20, 2015, 10:40:47 pm »
....and the rear suspension linkage (the dogbone link) is a potential killer! The rear suspension can seize and the resultant rock solid rear end can give way at the most inopportune moment; I believe the first appearance of this was a guy sliding down the M4 a few years ago after his rear seized in lane 3 in heavy rush-hour traffic.

BMW paid for a new bike, replaced all  his clothing and suitable compensation.

Brian (who is shocked at the emergency services cavalier attitude to their rider's safety)

Offline chriscanning

  • Hero Member
  • *****
  • Posts: 1160
  • Karma: +27/-4
    • View Profile
  • My K bike model:: K1200r Sport
  • Modifications and add-ons:: BST's Wilbers Kehedo Rexxer Puig Akra
  • Location:: Junction 7 M6
Re: Cam chain jump guard
« Reply #14 on: March 20, 2015, 10:45:38 pm »

[/quote]
Take a look at the photos at the start of this post and I explain how to check if you have a cam chain jump guard fitted. The tensioner will require attention if there is a clatter on start up that goes away after a few seconds. 
[/quote]

Even with the new tensioner and 5/40 mine will still rattle when it feels like it and I know Timbox's used to as well and he'd got a trick seal on his to help the job along.