Ah! OK will check. But what I don’t understand is why does the smoke then disappear when the engine is up to temperature!

Hello, I am new here and have searched the forums for a solution to my smoke issue - to no avail! Can anyone help? I have a 1978 Lightweight diesel LHD (ex Dutch army 24v). It’s in great shape having only done some 76km miles. When the engine is up to temperature it runs very well indeed with...