Help Needed With Cam Belt, Tensioner & Locking Tools

[Rockabill]

Mine is a 2004 1.9Tdi. I took off the cam belt to replace the water pump (detached impeller). In doing so I aligned the marks for TDC, inserted the crank shaft locking tool and the 6mm pin in the camshaft sprocket (which was a tight fit but went all the way in). Mine is fitted with a mechanical tensioner. I first removed the idler pulley, loosened the 3 screws in the elongated holes in the camshaft sprocket. I next slackened the nut on the tensioner and was able to move the tensioner back with an allen key. I did not insert a locking pin. On re assembly of the tensioner, with the 3 screws on the cam sprocket loose I wound the tensioner clockwise until the arrow at the back of the tensioner aligned with the notch and tightened the tensioner nut followed by tightening of the 3 cam sprocket screws. I can not now remove the 6mm pin in the camshaft sprocket! Haynes manual mentions loosening the 3 sprocket screws, which I have tried. Any suggestions on how to proceed would be much appreciated. I'm wondering if not locking the tensioner before taking it off and before replacing it has something to do with not being able to remove the 6mm pin? Inserting a pin in the tensioner after removal of the belt does not seem to make any difference to the tensioner.

[Rockabill]

An update. I managed to remove the 6mm pin in the camshaft hub with a pair of vice grips and a lot of pulling. Turned the crankshaft very, very slightly until I could fit in a 6 mm dia. drill bit. It fits snugly and can be removed easily. The Laser Tools C157 (OEM T10050/310-085), which I had used earlier, is too tight a fit to fit all the way in. Loosened the 3 camshaft sprocket securing bolts and turned the crank very slightly until the crank locking tool fitted into place. Checked the arrow indicator at the back of the tensioner was in the middle of the gap, removed locking tools, turned crank through 2 revolutions and checked everything again. With regard to my concerns about the tensioner, when I pull the belt between the idler pulley and the tensioner towards the front of the car, the pointer on the tensioner moves in a clockwise direction and when released returns to its central position. I guess I'm sorted?!