Glow Light Issue

[dcwicks]

Hi all, I have a 1990 GQ Deizel with an after market Turbo. Recently I had the front of the engine taken off, to fix a water leak, I think it was between the block and the water pump. Since then when I turn the car on when it is cold, the Glow light goes out and then I have to wait up to 30-40 seconds before the click. If I try and start it earlier the car just winds over for a while before starting. If the car is hot then there is no click at all.
Any ideas.

Cheers