K11 Owners Group

[malcolmt]

Hi all, I’m expecting to need to swap a couple of valve buckets next week, its my first shot at this work. I’ve taken the valve cover off and was looking at Ducks method of holding the tensioner down with a screwdriver. Ducks write up says use upward pressure to lever the tensioner down. When I try this the tensioner don’t move. If I jiggle the engine fowar and back the max movement I get on the tensioner is about 2mm down.
Is this normal ?? Is the purpose of the tool to stop the tension opening when the cam sprockets are removed rather than giving slack in the chain to work with ??
I need to change one or two inlet buckets, while I’m in there is it a wise move to record the size and position of all the buckets so if any others need changing in future…I’ll know what size is needed before pulling the cams. BMW SA claim not to stock the buckets !!! so I’ll have 2-3 week wait till the parts arrive from the UK. Such are the joys of living in Afrika.

Malcolm(t)
Joburg,
Souf Afrika
_________________
******************************
A Bike on the road is worth two
in the shed
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[Flying Duck]

You don't need to actually push it down, you just need to keep it from rising.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

[malcolmt]

Thanks a mill, that is what I thought.
The small screwdriver will be preferable to using a cup of tea laced with bromide to keep it down.
_________________
******************************
A Bike on the road is worth two
in the shed
******************************

[malcolmt]

I have a couple more questions.
I've got the cams out and five gaps are out of spec.

If I measure the bucket and it shows no wear...is it wise to swap them around to reuduce the number of new buckets I need to buy. as per 8v engines.

While loosening the bolts on the cam sprockets my screwdriver holding the cam chain adjuster popped out.
Am I now screwed...will I need to remove the cam chain cover and ignition pick-ups to be sure the adjuster is hunky dory with the chain before running th engine ???

EDIT.. The tool room at work checked the thickness of the five buckets, all measure exactly the marked thickness. its pretty impressive considering the engine has done 100,000km.
_________________
******************************
A Bike on the road is worth two
in the shed
******************************

[Flying Duck]

The timing chain tensioner is kind of a ratcheting mechanism. I suspect that if you've let it up then you'll have to pull the timing cover to reset it.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

[malcolmt]

Thanks Drake, I didnt pick up from the manual the mech is a ratchet.
Do you know if the crankcase cover needs removing to get the cam chain cover off. Also can i leave the ignition pickups in the cam chain cover when I remove it.. setting the ignition will be one less job when putting it back together.

malcolm
_________________
******************************
A Bike on the road is worth two
in the shed
******************************

[Flying Duck]

To the best of my recollection you need to remove the Hall
Effect Sensor to get the timing cover off. However, I wouldn't worry about that too much. If you line up the notch on the right side of the HES plate (looking at the engine from the front) by eyeball then it should be OK. I've done maybe 3 or 4 of them that way and when I double checked it with a timing light no adjustment was necessary.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE