How to do TDC and correct timing

RDWizard

The real question for everyone is how many crank rotations can it take to line up all the timing chain marks up properly?

The answer is NOT in the FSM!!!
I will provide pictures and the answer when I get to my PC.

TDC is easy.
The diagrams for the timing chains ARE in the FSM.
Nowhere can you find how many crank rotations it can possibly take to match TDC and all the timing chain marks.

phunk

Ill give it a stab without a lot of thought, but I warn I do not practice math much at all... but maybe...

Where x = timing chain links, and y = crank sprocket teeth

lcm(x,y) / y = revolutions between timing chain eclipse

anyone good at math? grade me

edit: never mind i just graded myself, i get an A+ this solution works.

__________________

RDWizard

For the sake of science (And because I couldn't find it anywhere on the internet) I counted the required revolutions of the crank between true complete 100% Timing Chain Alignment Check at TDC as per the diagram in the FSM.

1. Every 22 revolutions of the crank, the double orange links on the secondary timing chains line up with the proper dimples on the outer cams at TDC.

2. Every 1100 revolutions of the crank, the yellow links on the primary timing chain line up with the proper dimples on the inner cams at TDC and the double orange links on the secondary timing chains line up with the proper dimples on the outer cams.

That's once every 50th time condition 1 happens, condition 2 will happen!!

So if you're checking your timing, you may have to rotate the crank anywhere up to 1099 revolutions to check it.

Helpful Hint: Remove the sparks plugs before starting. It makes it a hell of a lot easier. Doh!

Attached Images

Timing Chain Alignment.jpg (198.0 KB, 36 views)