I've got into a bit of a pickle whilst trying to change the chain etc., on my 1.2, 12v, CGPA.

With the old chain still fitted, as I slowly turned the crank to get to TDC with a spanner on the pulley nut, the chain jumped on the crank sprocket. And now, when I get to TDC (by lining up the dots on the crank and balance shaft gears), the slots on the end of the camshafts are a mile out.

Thinking I might be at TDC on the exhaust stroke, when I turn the crank about 45 degrees it comes up against a dead stop. I'm thinking that is a piston hitting a valve.

Is there a way of finding out if I'm at TDC exhaust or TDC compression?

I'm thinking that if I knew it was the compression stroke then I could adjust the cams to fit the locking tools after I remove the old chain.

Thank you for your help in advance.

8 minutes ago, Doily said:

Is there a way of finding out if I'm at TDC exhaust or TDC compression

Yes, the slots for the locking tools on the ends of the camshafts are not central. The locking tools only fit and are able to be screwed in properly when they're at the compression stroke TDC.

Off the top of my head I can't recall if that's with slots horizontal and above centreline of camshaft, or below.

A quick look at the actual or pics of the locking tools should reveal which it is.