A loud pop, then engine dies, then I have to push a cb350 2 miles

Hey team,
An update: popped off the alternator cover, the alternator turns when e-start is engaged. pulled CAm chain tensioner I can see the chain, it's intact and rotating. Pulled off the Point cover, the points are not moving. Popped off one of the valve covers, it didn't move when the engine was turned.

My next move will be to pull off the engine....if I'm lucky I've stripped the bolts on the cam shaft and there won't be damage to anything else...

Does anyone object to me dismounting the engine? I can't think of another way to see the cam shaft.
 
Can't remember 100%, but I think the engine needs to come out of the 350 to work on the head.
 
Officers and crew:
Update: engine out, ( always forget how much of a bitch that is) the problem was, in fact, sheared bolts connecting the sprocket to the cam shaft. I was able to recover both bolts, I haven't found any shards yet but it appears the other half of the bolts are still in the sprocket. I'm going to break down the rest of top half of the engine over night and search for further damage.


Here's to hoping I get lucky.


While I have you ear. What do I need to buy? Cam chain, new gaskets ( tore about the old one), anything else?

I swear I'm putting the DCC crew's kids through college
 
cgguy09 said:
Officers and crew:
Update: engine out, ( always forget how much of a bitch that is) the problem was, in fact, sheared bolts connecting the sprocket to the cam shaft. I was able to recover both bolts, I haven't found any shards yet but it appears the other half of the bolts are still in the sprocket. I'm going to break down the rest of top half of the engine over night and search for further damage.


Here's to hoping I get lucky.


While I have you ear. What do I need to buy? Cam chain, new gaskets ( tore about the old one), anything else?

I swear I'm putting the DCC crew's kids through college
Click to expand...

You said you rebuild the engine.. one pic says it all:

821768_LB_00_FB.EPS_1000.jpg


put that on the 'need to buy list' asap.
 
You'll need to source those two cam bolts as well, but the problem is they are no longer available from the dealer and they are hard to come by.
 
Bert Jan said:
You said you rebuild the engine.. one pic says it all:

821768_LB_00_FB.EPS_1000.jpg


put that on the 'need to buy list' asap.
Click to expand...

I've got 2! 1/2 & 3/8

Alright I've broken down the top end of the engine, and no damage to speak of... Feeling lucky. Glen wood ill shoot you a PM, thanks for the hookup, bro.

Do I need to breakdown the lower half And look around for anything? I feel it would be a bit of an overkill. But if I'm missing something, I'll happily yield to expert knowledge.

Again, props to yo guys for recommending the cam shaft as the cause. I'm sure I would have arrived at the conclusion eventually but I would have really wasted my time on other things.

What I really need is a bell for this bike to keep the gremlins away,... I don't have one.
 
GLENNWOOD55CAMEO said:
^^^ +1, I'll bet thats what happened. The bolts broke. If the cam chain broke, it would lock up the engine and prevent it from turning at all. When you rebuilt the top end, were you aware that the two cam sprocket bolts are different and each goes in a specific hole??? One is all thread and the other has a shoulder on it......... :eek:
Click to expand...

i am in the process of rebuilding my cb360. is this also the case with the 360 motors? If i am reusing bolts should i use loc tite?
 
I can't recall if the 360 is the same or not. If reusing these two bolts its recommended to use red Loctite.
 
I've never had a problem reusing the cam sprocket bolts. Blue Loctite works for me.
 
Yeah, red is kind of overkill. It'll work, but I feel bad if you ever try to get them back out. Blue is the ticket.
 
Red is for "I don't have a welder, so I'll use Red Loctite instead"

We use red by the gallon at work..Sealing copper tubes into steel support sheets that are crush rolled into place. They never leak, and a hammer and chisel is used to remove....One time use it is perfect!
 
DrJ said:
I've never had a problem reusing the cam sprocket bolts. Blue Loctite works for me.
Click to expand...

Should I be using loctite on this? I don't think I've ever used it on the bike.
 
Red Loctite is only bad if you don't have beefy man-arms, but instead have been relegated to use gangly boy-arms for your project.

My recommendation for the inside of engines is always red loctiteIt's one thing to have trouble taking it apart, another entirely for it to decide it doesn't want to stay together while you're riding. Lemme tell you, that's a pretty terrible scenario.
 
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