SOHC.co.uk Forums > CB350/400

I think I've done something wrong!

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Nurse Julie:
You need to remove the sump pan to see if it ended up in there before trying to turn the engine over.

Bryanj:
The dowel must have been dislodged when you put the cover on, if some models do not have the big washer, which i havent seen but then never stripped an F2, it should be ok to run without.
Yes pull the sump to check on bits and i would fit 2 new cam sprocket bolts plus check threads in cam for damage.

SeanFD:
I will do.

DSS doesn't re-open until 02 Jan, by which time I'll be back in France – replacing the valves and guides on my K2 – so Rusty's completion gets delayed once again.

For now, I'll just put the covers back, and leave the oil in place till next time.

Maybe I should hire a van  :-\  ...

Just for interest, here are a before and after pic.

Laverda Dave:
I don't think the dowl was dislodged by the cam bolt I think they are two separate incidents. The dowl appears to be a 6mm item and is part of the rocker cover, I think the dowl fell out as you put the rocker cover on and lodged itself in the cam chain tunnel. When you started the engine the cam bolt hit the dislodged dowl and the shock caused the bolt to start undoing itself and fall out especially when you see the damage caused to the dowl and the speed the engine was idling at in the video.
You definitely need to drop the sump to check if the remaining part of the is in there. The sump pan also has a baffle plate and it may have landed on the top of that. It's quite easy to drop the sump, all the bolts are easy to get to with a 1/4” socket.
You could always try fishing down the cam chain tunnel using a long, thin magnet to find the remains. I dropped a head bolt washer down the tunnel once and expected to do a strip but used the magnet method and out it came 👍

Johnny4428:
You’ve made a nice job of that 400 on the restoration Sean. I do feel for you with this mechanical failure but you might find a bit of damage limitation in there hopefully. I agree with comments here that dowel must have been dislodged on assembly. Fingers crossed you get sorted  soon! You’ll soon find out if you did use loctite when you try and loosen the other bolt on the camshaft sprocket. Good luck!

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