Thread: Timing advice

Hey guys
Need some assistance. I ve trawled through other threads but nothing seems to hit the nail on the head.
I have just replaced the timing belt on my 98 Discovery 300tdi and when I went to take it for a test drive it started belching out smoke which did not happen before.
Now I know that the response will be that I must be out with the timing but I was completely anal about getting it right, triple and quadruple checking.
I had the flywheel and the fuel injection pump sprocket locked, the camshaft sprocket lined up with the point on the casing as well as the woodruff key at 12 o clock.
The new belt was quite tight going on because whoever was at it before me had loctited the three bolts securing the pump sprocket and I could not budge them, metal is soft and they just started to round off so I left them.
When I got the new belt on, checked the timing marks, slid the pump timing pin out and then unlocked the fly wheel.
Then I turned the crankshaft by hand 2 revolutions and everything lined up, locking pins engaged easily.
So then I took it for the test drive and saw the smoke (after about 100m) and came straight back. Had a look on the forum, figured I got the timing wrong so I took it all apart and the timing criteria was still spot on. I m at a total loss!!
Also when I went to start it the first time after what I thought was job done, she started alright but sounded very rough and then cut out, I then started her again and she sounded like normal.
I also think there might of been an airlock in the cooling system, would that have anything to do with it.
Any help would be greatly appreciated.
Phew that was a long one!!
Dave

Thanks Dave
All sorted now, took it apart and did it again from scratch. Drilled and extracted the 3 sprocket bolts which allowed slight movement of the sprocket enabling correct timing.
Its amazing how little tolerance is allowed!!