By now you all know my beautifull 4.2 turbo diesel died. I am all to blame. Not the engine or the mods done to it. We all know the 4.2 are over designed and very strong. That is why they can take whatever we do to it or how hard we drive it. One problem they have, is to keep them cool. My 4.2 ran hot without the turbo. Therefore I build a radiator so big it was almost impossible to fit it. The same time I turbo charged the engine. I was fedup driving it flatout in fourth gear to maintain 120kph. 33" tyres. The turbo made a huge difference, I could coast in 5th gear at a 140kph. The fuel consumption stayed the same 6.5km/l. The car still ran hot, only when I worked it.
My engine made 140kw and 430nm. My aim were 150kw and 500nm. It probably made more than what the dyno said, I could not get the boost, to boost properly on the dyno. Reason for that, there is not enough load, the wheels spin up to fast. On the road, the car made full boost. I could have ran it in 4 wheel drive on the dyno, but it is to late now, I will never know.
Nissan say the white section of the heat guage are normal working temp. Me, Frans say BULL@#$%. I fitted a mechanical guage and with the heat guage under half, it were normal, yes. With the heat guage on its way to the halfway mark, the mechanical guage say 100deg. Still a long way to the red. 3/4 the mechanical guage say 115deg, still in the white. Fully in the white, 120deg. No engine can stay alive at 120deg. That is why the AC turn off, when things get a little hot.
Therefore i fitted a bypass on the back of the head to get the hot water faster out of the head into the radiator. Also I made the waterpump pully smaller to speed up the waterpump and the fan. I fitted a bigger fanblade. All that worked and the car stayed cool. Only when I worked it very hard, the water temp went to 100deg. It was much better, but I did not like it. A oilcooler was the next step.
Anywhy, on the way back from the long weekend, towing my explorer van @ 150/160kph, I know it is stupid to drive that fast, but I drove the road open. Cars were travelling 90kph and caused a huge pile up on the highway. I could hate that.
Everything were normal, EGT 610deg, boost 1bar, heat normal. Negotiating my way through the traffic at high speed, not looking at the guages, the car must have started overheating without me knowing of it. I am not looking for any excuses, it must have happend over the last 3km.
The car slowed down so fast, I do not know if I can hit the brakes that hard. The engine ceased. On the way to the side of the road, I noticed both the guages were pegged in the red. Water ran out of the exhaust and the overflow bottle was steaming. Oil were all over the engine bay. The same day the engine broke, me and Pieter pulled the engine out. Dankie Pieter. While we were doing that, the wife was unpacking the caravan and Patrol.
I am not going to post pics, I am not going to open the engine, it will go to the dumps. I will not fit a TD42, obviously I can not fix the overheating problem. I will not spend another penny trying that.
I am not sure what engine i am going to convert into the Patrol, but I will keep you posted on the new transplant.
The diesel td42 guys,keep it cool.
Read on the ozzy forum how they struggle to keep them cool.I also can not badmouth the 4.2 it gave me great driving pleasure.
Rdgs
Frans
Iam almost tempted to remove the bonnet 
