5 sec glow is unrealistic -- mine takes 20 sec or so, and it get longer as it gets colder out. I usually leave them on 10 sec or so after the light goes out if it's well below freezing.

I get a couple misfires and a bit of white smoke when it's colder than freezing, and the engine is sluggish for a mile or so.

Missing, nailing, and smoke are normal for this engine (and it's not really bad as far as deisels go, I've seen some that blow huge clouds of white smoke for a couple minutes....).

New glow plugs will help some, especially with the miss.

My volvo runs the GP for about 30-60 sec after starting, and that helps quite a bit (similar design).

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!