How to remove a cam properly

[SHOtimer]

I cannot seem to get the cam chain out of the front head with the cams in. I managed it out of the back, but can't do the front. My Helms says that the journals must be removed in a specific way, but it only gives me a tightening sequence. How do I remove a cam properly? Also, on this motor the journal that is not under the VC (on the front head) has a bit of sealant coming out around the edges does that need to be sealed like that?

Thanx, Doug

 

[yamahaSHO]

When you tighten, you want to work evenly, but you want to start on the journals that have the cam lobe pressing the vavle down. The will prevent warping of the camshaft.


IIRC, you want to go opposite of the removal sequence.

 

[jelloslug]

And don't do what I did the first time I changed a tensioner; drop a cam bearing cap bolt down the oil return in the head...

 

[SHOtimer]

If the tightening sequence does not start in a place where the lobes are pressing down the valves should I still use it?

So, just do the reverse of the tightening sequence to remove the cam?

What about putting sealant on exposed cam journal cap, is that standard?

Well, I will be doing the rod bearings this weekend so i'm not too worried about dropping a bolt...

Doug

 

[jelloslug]

The key is to loosen and tighten evenly across the entire camshaft so you don't warp or bend anything. I would loosen the bolts a turn or two at a time in the listed sequence until there was no more tension on the cam shaft. The cam bearings are aluminium and non replaceable so you don't want to damage them. You will need to reseal the end cap, be sure to not disturb the cam seal or you will have a nice oil leak behind your timing belt. The end cap has a small groove machined in for the sealant.

 

[SHOtimer]

The key is to loosen and tighten evenly across the entire camshaft so you don't warp or bend anything. I would loosen the bolts a turn or two at a time in the listed sequence until there was no more tension on the cam shaft. The cam bearings are aluminium and non replaceable so you don't want to damage them. You will need to reseal the end cap, be sure to not disturb the cam seal or you will have a nice oil leak behind your timing belt. The end cap has a small groove machined in for the sealant.

Sounds good. Thanx for your help.

Doug