cam timing

[reedreed]

Hi everybody,
I have received rebuilt cylinder head (stamped as 1 288 086.9, 13 in circle, year 86) from the workshop
but as I can see for some reason the cam is not in TDC position - 1st cylinder lobes up.
So the question is how turn/set it on a bench? Or if I should put it on a block first how to turn/set it on the car with timing chain off?

 

[Stevehose]

Install 2 of the 4 m6 bolts into the cam gear flange and leverage it with a big screwdriver or similar.

 

[reedreed]

Hi Steve,
Doesn't work for me - bolts started to bend but cam didn't move at all.
I'm not experienced enough but I didn't expect so high resistance here. Looks like something is going wrong.
How it possible that we can we rotate all the engine with 30 cm tool (crank+cam + even spark plugs installed)
and the same time I couldn't move cam on a bench with 50cm leverage?

 

[autokunst]

Curious. Is there any evidence of damage during shipping? Have you checked the head for flatness? Photo? I've learned a little bit about the relationship of the cam journal to the "deck" of the head with respect to prior warpage. Hope that isn't the case here, but I am keenly interested in following along on your journey.

 

[sfdon]

Sounds like it is at TDC for cylinder 6?
Have you installed the cam gear?

 

[reedreed]

Hi Don,
Exactly! 1st cylinder lobes up, 6th cylinder lobes down. BUT, look what I have from the valves side:
1st cylinder - both valves closed
6th cylinder - both valves closed.
How its possible?

 

[JFENG]

Are all the eccentrics backed off all the way?

 

[reedreed]

Are all the eccentrics backed off all the way?

Yes

 

[sfdon]

You are moving up the ramp on Cylinder one cam lobes. Not at apex.

If I had a problem rolling the cam (41mm socket), I would roll the crank so all six pistons were below deck, install head (no gasket, 2 bolts) and try rolling the cam again. First I would check that every rocker was over it’s corresponding cam lobe.

If your rocker arm has moved out of position- you will break it with too much force.
Rockers can and do move.