Unfortunately, you can wait a long time for a response in French here.Hello everyone,
Can someone help me on this?
thank you very much
Unfortunately, you can wait a long time for a response in French here.
There are two TDCs, the top of the exhaust stroke and the top of the compression stroke. It looks like you've found the top of the exhaust stroke where both valves will be open a bit. Rotate the crankshaft 360 degrees (at the top of the compression) and see what happens.
You can check the stroke by observing the ignition points. The points will be slightly open (<1mm) at the top of the compression but widely open at the top of the exhaust.
Timing timing problem[/DEVIS]
thank you very matshIt's normal for the intake valve to be at the point of starting to open when setting the cam timing on the DOHC 450, that cylinder is beginning its intake stroke. The cam's timing marks are not always perfectly marked on the cams, there are slight variances and not every set of cams will line up exactly on the marks at the same time as you would expect. If the distance the mark is off is less than the distance of moving the cam one tooth on the sprocket, then it will be fine as you have it now.