Author Topic: Cam chain problem  (Read 150 times)

Offline Boxermann

  • ^ Proficient Motobricker
  • Posts: 145
Cam chain problem
« on: September 12, 2019, 08:31:13 AM »
Hi,

So... I've had the header off, and now when I've assembled it I can't turn the engine. I can turn the cams and crankshaft, but as soon as I mount the chain it's stuck after half a turn. What obvious thing have I've missed?

1987 K100
  • Norway
  • K100 / '87

Offline Laitch

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  • Posts: 6916
Re: Cam chain problem
« Reply #1 on: September 12, 2019, 09:15:28 AM »
Exactly what type of work was done that needed removal of the header? Are you referring to the exhaust manifold, or the cylinder head?
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline Boxermann

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Re: Cam chain problem
« Reply #2 on: September 12, 2019, 12:47:59 PM »
Exactly what type of work was done that needed removal of the header? Are you referring to the exhaust manifold, or the cylinder head?

Cylinder head. I replaced the head gasket.
  • Norway
  • K100 / '87

Offline Scott_

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  • Posts: 2002
Re: Cam chain problem
« Reply #3 on: September 12, 2019, 01:08:38 PM »
From where I sit here in my chair, it sounds like your physical crankshaft/camshaft timing is not correct.
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1997 K1100LT 0302488
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Offline Laitch

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Re: Cam chain problem
« Reply #4 on: September 12, 2019, 01:40:46 PM »
As Scott_ indicates, installation of the camshafts without a loads on their cams, camshaft sprocket alignment and agreement of camshaft sprocket alignment with crankshaft alignment are critical. At which fitting are you rotating the crankshaft? With which tool are you rotating it? In which direction are you rotating it? Are the spark plugs installed?

  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline Boxermann

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  • Posts: 145
Re: Cam chain problem
« Reply #5 on: September 12, 2019, 07:07:46 PM »
Thanks guys. Yeah, I think I just have to start over. 

At which fitting are you rotating the crankshaft? With which tool are you rotating it? In which direction are you rotating it? Are the spark plugs installed?

At the ignition rotor flange retaining bolt with an allen key, anticlockwise. Plugs out.
  • Norway
  • K100 / '87

Offline Chaos

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  • Posts: 2440
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Re: Cam chain problem
« Reply #6 on: September 12, 2019, 09:59:48 PM »
hmmm, are K's interference engines?  I don't recall it ever coming up before.
  • sw ohio
1987 K75S    VIN 0231
Original owner, Original litter
200,000 miles (plus or minus) and 5 paint jobs
2012 Ural 2WD sidecar (BMW's bastard step child)

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