Chain sprocket alignment..54.8 mm for the left chain not sure where to measure from.

[H.G.P.]

Early case, L and R camshafts installed, now the sprocket alignment:

1. Front of case to intermediate shaft sprocket measured, and then

2. Straight edge to right side sprocket.

Both measurements same.

3. On to the left, I do not know where the straight edge should be located? And how the 54.8 is factored in.


Lastly on a side note.....with Ps and Cs in, heads, cam towers and camshafts and chains, but not the rockers, installed, my pulley nut I cannot really any longer turn it by hand. I can by wrench at around 15-18lbs. Sounds OK or not?

Thanks

[Eagledriver]

The straight edge is used the same way you used it on the right side. You need to have the left sprocket 54.8 (I didn't check this number) mm further back than the right one. Just measure the distance to the left sprocket subtract the 54.8 mm and you should get the same number as you had on the intermediate shaft sprocket and the right side sprocket. You are just aligning the sprockets and the ones on the intermediate shaft are 54.8mm apart.

If your cams are not turning freely you need to do something to fix that. You can try torquing the headstuds in a different order. You may end up having to have the heads or cylinders or case machined.

-Andy

[AFJuvat]

Are you sure you have the chain gears aligned properly?

Concave out on 1 - 3 concave in on 4 - 6

AFJuvat

[H.G.P.]

Originally posted by Eagledriver
The straight edge is used the same way you used it on the right side. You need to have the left sprocket 54.8 (I didn't check this number) mm further back than the right one. Just measure the distance to the left sprocket subtract the 54.8 mm and you should get the same number as you had on the intermediate shaft sprocket and the right side sprocket. You are just aligning the sprockets and the ones on the intermediate shaft are 54.8mm apart.

If your cams are not turning freely you need to do something to fix that. You can try torquing the headstuds in a different order. You may end up having to have the heads or cylinders or case machined.

-Andy

OK, I see this is a correction from the first edition of the book. I was mistakenly adding instead of subtracting the 54.8.

The cams are turning "freely"...i.e. meaning that I can turn each by hand, and fairly easy by hand with the cam socket too.


AF Juvat: I have the sprockets "dish out" on the left, "flatish concave dish" in on the right. Measurements on the right came out exact with the intermediate shaft.

Thanks!!