SOHC.co.uk Forums > Project Board
CB466f
Erwin83:
Another little step. Something seems to run a litle bit more heavy than normal. But what exactly?
I opened the tappet cover and the generator cover, also removed the sparkplugs.
I can turn the rotor (and therefore crankshaft) a little bit by hand (probaby the slack in the primary chain). When I turn the rotor, the camshaft immediately also starts moving, so there is no exces slack in the cam-chain.
More importantly: rotating this small distance is very easy (2 fingers). So I am lead to believe the resistance is not caused by the crankshaft bearings (camshaft looks fine too). I also don't see any glitter in the oil collected under the camshaft.
So, the resistance might be caused somewhere down the line, but what?
There are large bearings for the primary shaft. Those don't need any force to install and seem fairly oversized and extremely well lubricated.
Maybe the needle bearing of the primary shaft?
I did use a rubber mallet to massage the primary axle through the bearing and holder.. Have I destroyed that? How to diagnose this without splitting the cases again, is that even possible?
McCabe-Thiele (Ted):
--- Quote from: Erwin83 on August 22, 2021, 05:28:19 PM ---Another little step. Something seems to run a litle bit more heavy than normal. But what exactly?
I opened the tappet cover and the generator cover, also removed the sparkplugs.
I can turn the rotor (and therefore crankshaft) a little bit by hand (probaby the slack in the primary chain). When I turn the rotor, the camshaft immediately also starts moving, so there is no exces slack in the cam-chain.
More importantly: rotating this small distance is very easy (2 fingers). So I am lead to believe the resistance is not caused by the crankshaft bearings (camshaft looks fine too). I also don't see any glitter in the oil collected under the camshaft.
So, the resistance might be caused somewhere down the line, but what?
There are large bearings for the primary shaft. Those don't need any force to install and seem fairly oversized and extremely well lubricated.
Maybe the needle bearing of the primary shaft?
I did use a rubber mallet to massage the primary axle through the bearing and holder.. Have I destroyed that? How to diagnose this without splitting the cases again, is that even possible?
--- End quote ---
My shaft pushed in easily by hand once I had got everything aligned - it was just getting the first 1mm into the main bearing that thwarted me for a few minutes until I rotated the crank a tad. I would have thought you could inspect the needle roller by pulling out the shaft and looking inside with a good beam of light to see if the needles are damaged?
Erwin83:
Found it!
Apparently, I have forgotten to tighten the bolt in the primary shaft. :-[
The bolt came loose and almost came out of the clutch cover...
Big oops...
I've alread found a new clutch cover, so the plan now is to flush the oil system twice (new oil and filter) to get rid of any aluminium shavings.
Good idea?
McCabe-Thiele (Ted):
--- Quote from: Erwin83 on August 22, 2021, 09:01:03 PM ---Found it!
Apparently, I have forgotten to tighten the bolt in the primary shaft. :-[
The bolt came loose and almost came out of the clutch cover...
Big oops...
I've alread found a new clutch cover, so the plan now is to flush the oil system twice (new oil and filter) to get rid of any aluminium shavings.
Good idea?
--- End quote ---
Yikes - well done at least you do not have to split the casings - obviously you will drop the sump pan to clean the screen filter & the base of the sump.
philward:
Phew, not as bad as it could have been!
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version