So I have a 1998 R34 Sedan Auto RB25DE, I just recently changed the coolant. I unscrewed the bung from the side of the block as well as the bung on the underside of the radiator. Drained all the coolant and screwed the bungs back on. Filled up the coolant, but it didn't take the required 9.4 litres of coolant. So I've been running the engine until operating temp and then shutting it down until it cools, and then I pour more coolant in. And just today I took it for a short 10min drive and when I got back there was white smoke coming from the left side of the block near the coolant bung. Any ideas?