What is the position of the crankshaft when setting valve timing?

Timing in the Camshaft. Rotate the crankshaft clockwise to 90 degrees after TDC. This will make sure all the pistons are half way down the bore. Now position the dial gauge so that it can read the lift of the inlet valve of number 1 cylinder from the top of the valve retainer (see left).

What is the measure of crankshaft degrees the valve is held open?

Valve Duration
Valve Duration is the length of time that the valves are held open, measured in degrees of crankshaft rotation. Valve lift is the amount that the valves are opened, usually expressed in millimeters.

How do you change the timing belt on a car?

(5) Release any belt tension by freeing up the belt tensioner pulley. (6) Slip the new belt into place without disturbing the cam or crank pulleys, or the engine will be out of time. Check by slowly rotating the crank two full turns with a socket on the crank snout.

Where are the timing marks on the crankshaft?

For the crankshaft below, there probably will be a timing mark on the damper pulley that lines up with another mark on the lower cover. Or, the service manual may direct you to the transmission end of the engine to look through a hole in the bellhousing for a timing mark on the flywheel.

Where to find the TDC mark on a timing belt?

(2b) The flywheel pulley TDC mark is accessible through a hole in the bellhousing. (2c) The camshaft TDC is easy to find — especially if you add white paint as we did. We cannot stress this enough: Be careful!

What does the timing belt do on an OHC engine?

The timing belt (or chain) is the sole component that keeps the camshaft (make that camshafts on a DOHC or V-type OHC engine) and crankshaft in sync.

Can a timing belt be replaced with an engine?

1) That interference engine thing again; and 2) Every camshaft and crankshaft on planet Earth is indexed to No. 1 TDC. If you try to remove and replace the timing belt with the engine in any other position, chances are good you’ll throw things out of time.

How do you align the timing belt cover?

• After aligning the matchmark, hold the timing belt. And turn the crankshaft pulley clockwise, and align its groove with timing mark ”0” of the No.1 timing belt cover.

Where are the timing marks on a timing belt?

(2a) Find the timing marks on the flywheel and cam, and set them both to TDC. (2b) The flywheel pulley TDC mark is accessible through a hole in the bellhousing. (2c) The camshaft TDC is easy to find — especially if you add white paint as we did.