tinytrains
Still plays with trains.
So has anyone done a valve adjustment yet?
Is it the same as the Cam-Head?
Just curious.
Is it the same as the Cam-Head?
Just curious.
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Valve Adjustment?
- Thread starter tinytrains
- Start date
tinytrains
Still plays with trains.
Yeah, I saw that. A bunch of people who have not actually done the job, discussing "how it might" be done. I thought by now, someone would have done the deed.
jimvonbaden
Kool Aid Dispenser!
Checking is easy, just get top dead center:
Insert the feeler gauge between the valve shim and the follower and check for spec.
Adjusting is a bit more complicated as the shims need to come out. So do that the cams need to come out.
Remove the cam cage:
The cams literally fall out.
Lift the follower:
Use a magnet to pull out the shim.
Reverse to put back together.
It is a little more complicated than that, but easily doable by the home tech with standard tools.
By the way, some info you might find useful:
LINK TO WETHEAD SERVICE SCHEDULE!
Link to Tool Lists Download in Word Format!
Link to Valve Chart!
Link to Torque Values!
Jim
Insert the feeler gauge between the valve shim and the follower and check for spec.
Adjusting is a bit more complicated as the shims need to come out. So do that the cams need to come out.
Remove the cam cage:
The cams literally fall out.
Lift the follower:
Use a magnet to pull out the shim.
Reverse to put back together.
It is a little more complicated than that, but easily doable by the home tech with standard tools.
By the way, some info you might find useful:
LINK TO WETHEAD SERVICE SCHEDULE!
Link to Tool Lists Download in Word Format!
Link to Valve Chart!
Link to Torque Values!
Jim
jimvonbaden
Kool Aid Dispenser!
I guess you would have to ask BMW.
BTW, the Camhead has been around longer than 4 years.
I expect it has to do with reducing the valve check/adjust frequency.
Jim
The overhead cam is a vast improvement in valve workings (as mentioned above). Overhead cam systems use shims of one sort or another. I suspect the three year run of the cam head using hemispherical shims was ended because the new shims are lighter, smaller and flat on both sides. Of course there must be other contributing reasons as this is such a totally different engine other than twin opposed. In the new engine the shims just slip into the designed hole on top of the valve stem/keeper in the upper spring retaining disk. Very slick. They cost about $4.50 each and there are 21 sizes. If you work on a couple of bikes you can start collecting a few, but it is turning out that the system is very stable. Official maintenance is; check the valves every 12K miles.
BobHancock
New member
I imagine returning the cams to their proper position will be the next instruction needed. Other than that, it looks pretty straightforward. No chains to mess with, just align the gears.
marchyman
Cam Killer
If the flywheel is locked or otherwise has not moved then putting the cams back in the same orientation that they were removed should be enough. I'm copying Jim's picture that showed a ruler on the flats of the cam. Remove the cams this way. Install the cams this way.
Nota bene: if you loosen the cam sprockets (you don't need to and shouldn't) then all bets are off. So don't do that.
tinytrains
Still plays with trains.
Thank you. That is what I have been wondering about.
Not as simple as the hex head, but a lot better than a new K-bike.
Not as simple as the hex head, but a lot better than a new K-bike.
HaroldGSW
New member
Question about which adjustment plate (shim) size to use...
Hey Jim, sorry about the lame question, but with 21 different choices of adjustment plate to purchase, how do you know which is the correct set to order? And by the way, I've ordered you DVD, which should make it to my home next week in Charleston, SC. In the meantime, I was curious how this small feat is accomplished. Since I must order the shims before I open everything up...you can see where i'm going with this. Thanks to anyone who can answer my question.
Hey Jim, sorry about the lame question, but with 21 different choices of adjustment plate to purchase, how do you know which is the correct set to order? And by the way, I've ordered you DVD, which should make it to my home next week in Charleston, SC. In the meantime, I was curious how this small feat is accomplished. Since I must order the shims before I open everything up...you can see where i'm going with this. Thanks to anyone who can answer my question.
80092
Member
Harold you must first inspect and or measure the shim your bike came with. If the clearance is to tight usually going down 1 size will get you in spec. I would measure the clearance and calculate for the most accuracy.
jimvonbaden
Kool Aid Dispenser!
Correct. It really is that simple. It is pretty rare you will need to replace a shim, but if you do you can swap it out fairly easily.
Jim
jimvonbaden
Kool Aid Dispenser!
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