How do you lock timing up on peugeot 2.0 307 hdi?

To lock the timing on a Peugeot 2.0 HDi engine, you'll need to use a timing tool kit designed for this specific engine. First, remove the timing belt cover and align the crankshaft to the TDC (top dead center) mark. Then, insert the locking tool into the camshaft to secure its position. Finally, ensure the timing belt is correctly tensioned before reassembling the components.