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Discussion Starter · #1 ·
Hello all!

I'm working in a friend's CL160 engine. Got everything off the head, but the cams and cam shaft and finally got all the long studs to move freely, but when I try to get the head off, something hits the second front stud from the right about half way up. It makes a grove in the stud treads. Did I forget to remove/loosen something? The head won't come off at all!

Thx
 

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Are the rockerarm arm and shafts removed?
If the shafts are pushed below the outside edge (toward the center of the head) they will press on the studs.
 

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Discussion Starter · #3 ·
No they are not. I can not get the sleeves out. They say to use a 6 mm bolt and screw it into them, but don't have any and don't see treads in them. Any other way to remove them?
 

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The 160 rocker shafts don't have puller holes. Get a hold of them ,as best you can, with pliers or a screwdriver wedged in the hole and try to turn back and forth to free things up. Once you get to where you can turn them a little you should be able to pull them out. Warming up the head first will help quite a bit. A quarter inch out will be plenty to be able to remove/install the head.
 

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The 160 does have puller holes, and if I remember correctly the cylinder/head studs go through a grove cut into the rocker shaft. You remove the head and then remove the rocker shafts. I think what is happening is that the shaft is rotating against the stud as you are trying to remove the head.
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The 160 does have puller holes, and if I remember correctly the cylinder/head studs go through a grove cut into the rocker shaft. You remove the head and then remove the rocker shafts. I think what is happening is that the shaft is rotating against the stud as you are trying to remove the head.
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The 305 has notches for stud clearance and threaded puller holes. The 160 rocker shafts are a simple tube, both ends the same and smooth inside with no threads. If you push the shaft all the way in it will snag the threads of the inside stud. I have three of them apart in boxes here, I just looked. The head comes right off with the rocker pins pulled out just a little bit.
 

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It has been some time since I had one apart, but I remember making a puller to remove the rocker shafts with. I think I might have put a nut on the end of the bolt now that I think about it and used a piece of tube as a puller spacer. However I do know that I removed/replaced the rockers/shafts with the head removed.
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DSCF0411.JPG
That's the 305 rocker shaft tool on the left, 6mm. threads on the end. 160 rocker shaft on the right, 7mm. hole, a bit over 60mm. in length.
 

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I have pulled rocker shafts with strong(ish, nothing crazy) earth magnets, I don't remember if the cb160 ones are magnetic or not. Probably.

Other option is a nail filed down to just barely fit through, get it hooked onto the far end and pull it out that way
 

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I'd try using a heat gun or a small torch on the area around the rocker shaft, and a long thin screwdriver down the tunnel to use as a wedge (as Mike suggested).
I first encountered this issue when assembling the head and was puzzled why it wouldn't go on.
 

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I used needle nose pliers with turning motion but they buggered up the tube end a little. Did you remove the bolt on the head cover and the center bolt on the back of the cylinder?
 
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