Hi all
Ill try and explain this in the best way I can.
I have a 2000 ST1100, currently rebuilding engine due to a shot piston ring.
Crank case assembled with new bearings and piston rings, cylinder head also installed. Had trouble with one of the valves sticking but got that sorted now.
To make things easier I'm looking at the timing belt head on. My Current issue is with the left side cylinder head. indicated in the picture attached.
before I installed the Cam shafts, I could manually rotate the crank with no issues. but after installing the cam shafts on the left side (which is actually the right cylinder head). I can only turn the crank less than half a rotation before it seizes.
It can be seen from the indicator marks on the timing how far it actually turns before seizing.
The engine does not have the gearbox installed.
The Timing is correctly aligned with all the notches in the correct position. and the cam shafts correctly placed (RH.IN) on the inside nearer the carburettor side and (RH.EX) on the outside. with the notches facing out.
Ive, checked the valves on the cylinder head and non seem to be sticking. yet as soon as install the cam shafts, the crank won't turn more than a third rotation.
As a last ditched effort to try and figure out if it was the cam shafts causing the issue. I temporarily installed the same ones in the other head, yet they seem to work fine on that side as the crank turns with no issues, which leaves me to think that its the head itself causing the issue. Bearing in mind that the troublesome head had no cams installed when crank was rotating smoothly.
I can't see it being the pistons or the new rings either as they are running smoothly when cams are not installed.
If anyone could give me any suggestions, it would be a big help. Also if you need any information please let me know.
Many thanks
Ill try and explain this in the best way I can.
I have a 2000 ST1100, currently rebuilding engine due to a shot piston ring.
Crank case assembled with new bearings and piston rings, cylinder head also installed. Had trouble with one of the valves sticking but got that sorted now.
To make things easier I'm looking at the timing belt head on. My Current issue is with the left side cylinder head. indicated in the picture attached.
before I installed the Cam shafts, I could manually rotate the crank with no issues. but after installing the cam shafts on the left side (which is actually the right cylinder head). I can only turn the crank less than half a rotation before it seizes.
It can be seen from the indicator marks on the timing how far it actually turns before seizing.
The engine does not have the gearbox installed.
The Timing is correctly aligned with all the notches in the correct position. and the cam shafts correctly placed (RH.IN) on the inside nearer the carburettor side and (RH.EX) on the outside. with the notches facing out.
Ive, checked the valves on the cylinder head and non seem to be sticking. yet as soon as install the cam shafts, the crank won't turn more than a third rotation.
As a last ditched effort to try and figure out if it was the cam shafts causing the issue. I temporarily installed the same ones in the other head, yet they seem to work fine on that side as the crank turns with no issues, which leaves me to think that its the head itself causing the issue. Bearing in mind that the troublesome head had no cams installed when crank was rotating smoothly.
I can't see it being the pistons or the new rings either as they are running smoothly when cams are not installed.
If anyone could give me any suggestions, it would be a big help. Also if you need any information please let me know.
Many thanks
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