Engine Timing question

[ALEXAKOS]

As most of you know I reassembled the engine my self recently.
On my effort to install the distributor, I turned the crank and noticed it has two positions where it stiffens.

Is that normal of have I done a mistake when I reinstalled the timing chains?

I followed the book instructions and I did the procedure twice to make sure.

I do remember that one of the two timing chain's marks did not come in to position as described in the book and there's was no way to have it work.
The two chain wheels on the cams however were precisely set as described in the book.


Thoughts?

[opethmike]

Are you turning it over with or without the spark plugs installed? If they're in, you could be fighting compression.b

[Farrar]

I took the plugs out and stuck my thumb in hole #1 to feel for suction. That way I knew I was coming upon the TDC mark.

[ALEXAKOS]

Nope, no spark plugs installed.

Yes Farrah I know how to find tdc.

I was just asking if the resistance I am finding while turning the crank on two positions is normal or not.

[Josh]

spark plugs were the first thing that popped into my head too lol. But i looked at the pics in your build and noticed you hadn't put them in yet. Not giving you enough credit i guess :P

[Bitsyncmaster]

This is a good question.

With our odd fire engine, I wonder what the valve sequence is on each rotation. Of course a one cylinder engine would have a valve spring compressing at specific degrees of the crankshaft rotation. On multi cylinder engines I would assume a valve spring is compressing at many points in the rotation.

I can't say I've ever noticed much on engines I've overhauled since they usually had new pistons and rings (over size) and that friction would overcome much of the valve spring forces.

[Delorean Industries]

Without seeing multiple pictures of the chain/crank/cam position I can't say for sure. But if the rocker arms are not adjusted and you are turning the engine over with the rocker screw fully backed off the rocker arm will contact the side of the valve spring retainer. This will cause it to feel like it is binding. If you have any doubt in your mind about the camshaft timing I would recommending checking this once again now before proceeding. Feel free to contact me directly for this procedure.

[ALEXAKOS]

Without seeing multiple pictures of the chain/crank/cam position I can't say for sure. But if the rocker arms are not adjusted and you are turning the engine over with the rocker screw fully backed off the rocker arm will contact the side of the valve spring retainer. This will cause it to feel like it is binding. If you have any doubt in your mind about the camshaft timing I would recommending checking this once again now before proceeding. Feel free to contact me directly for this procedure.

Bless you josh! I was hoping for your help.
Sent an email as you pm inbox is full;)

[ALEXAKOS]

Feel free to contact me directly for this procedure.
josh,
Don't let me waste your time!
I found the the trouble. I missed a very important line on the manual that instructed to turn the crank right aligned to the oil pump to install the LH chain.

All set! Engine now turns freely;)