Cam gear difference? Adventures in getting my head back on.

[Pablo M]

So I feel I’m making steady, if slow progress getting my rebuilt head back on. Thought I was clearing a milestone tonight actually fitting the head on. 
 

I have a 72 2002tii, March 72 production date. 121 head. Engine and head both at tdc.
Bought a replacement new cam from Ireland, among other internal bits, that the machinist used. I did specify the year and it being a tii.
I go to fit the cam gear and the alignment dowel/peg keeps getting caught up. Looking closely the cam mounting surface and it also has a dowel. So two males, no female. I never compared the two camshafts. 
How f’d am I?

 

 

I'm both excited and super frustrated. 

[Rob Zaeos]

My guess would be the dowel should be in the cam and yours came out on the sprocket during disassembly. Can you knock out the one in the sprocket ?

[tech71]

43 minutes ago, Pablo M said:

How f’d am I?

Meh, not very provided you can get the superfluous pin out of the sprocket without dropping it in the engine 😉

Sorry, just be careful taking the sprocket out, hate for you hear the dreaded "tink"of doom.

Check out old cam, pin must be missing I hope.

Edited October 20, 2023 by tech71

[Pablo M]

2 hours ago, Rob Zaeos said:

My guess would be the dowel should be in the cam and yours came out on the sprocket during disassembly. Can you knock out the one in the sprocket ?

My fear was that there was a design change and I needed a new cam gear. If it’s gotten stuck in the gear I can take it out. Although I imagine it’ll be a bear to get out lol. 

1 hour ago, tech71 said:

Meh, not very provided you can get the superfluous pin out of the sprocket without dropping it in the engine 😉

Sorry, just be careful taking the sprocket out, hate for you hear the dreaded "tink"of doom.

Check out old cam, pin must be missing I hope.

For sure old cam doesn’t have pin. I didn’t know which was supposed to have it and it there was a design change early vs late. 
probably not a good idea trying to remove pin with gear in place lol. I suppose I can paint mark the gear and chain then be careful about reinstalling it. 
Thank god. Not the end of the world. 
 

Thanks guys. 

[OldRoller]

Just remove the gear, use a pin punch and knock the dowel out front the front side, it'll come right out... no worries!

 

[Mike Self]

7 hours ago, Pablo M said:

I didn’t know which was supposed to have it and it there was a design change early vs late. 

AFAIK all M10 engines use the same setup WRT where the locating pin goes.  And...I hope the new cam you sourced is compatible with the tii MFI...From everything I've read and heard, a stock Kugelfisher system doesn't play nicely with a hotter camshaft--unless you have a KF wizard who can tweak its innards to accommodate a longer duration camshaft.

 

mike

[Pablo M]

1 hour ago, Mike Self said:

AFAIK all M10 engines use the same setup WRT where the locating pin goes.  And...I hope the new cam you sourced is compatible with the tii MFI...From everything I've read and heard, a stock Kugelfisher system doesn't play nicely with a hotter camshaft--unless you have a KF wizard who can tweak its innards to accommodate a longer duration camshaft.

 

mike

Yes. I’ve heard the same about the MFI. Andrew at Ireland tried to sell me on a hotter cam until I reminded him it was a tii. His response, ‘nuff said’ lol. It is a new billet stock replacement cam. 
It didn’t occur to me the locating pin was a separate removable piece. 

[bergie33]

I thought the locating pin was supposed to be on the cam gear?  That's how my NOS gear came.  Either way, it shouldn't matter.

[Son of Marty]

I don't know how the gear and chain must be suspended came from, but it serves no purpose at all, as long as the top and bottom end are at TDC so just pull the cam gear out of the engine and pull the pin and reinstall and you're good. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[Cabbage Fumes]

PSA: the locating dowel is a separate piece. It doesn't come in a cam, and it isn't installed in a gear as a replacement part. The dowel has a micro-size ring around the middle to prevent it from coming out of the front of the gear, so it must be driven out from the front to exit the back side. As was just mentioned, forget about all the gear must stay in the chain, suspended. Upper and lower notches lined up, tensioner piston out, slack out of tension side of the chain, line up dowel. Much easier than it sounds.

[jimk]

40 minutes ago, Son of Marty said:

I don't know how the gear and chain must be suspended came from, but it serves no purpose at all, as long as the top and bottom end are at TDC so just pull the cam gear out of the engine and pull the pin and reinstall and you're good. 

 

+1 It can get somewhat bunched up down under if let drop.  However a little jiggling and it will pull back into place.

[Cabbage Fumes]

Jimk, as they say, if you jiggle it more than once, you're playing with it.

[jimk]

4 hours ago, Furry Camel said:

Jimk, as they say, if you jiggle it more than once, you're playing with it.

It's necessary to get it up (the chain, you pervert).

[OldRoller]

8 hours ago, jimk said:

if you jiggle it more than once, you're playing with it.

I'll never jiggle the throttle linkage again without laughing.... 😄