I have a 1992 535i with the M30 engine and standard transmission. I live in south Florida and around the end of Dec we had some cooler weather and I was driving home and stopped for gas. I started the car and got about a mile down the road and my temp gauge started for the red zone. It never made it all the way before I shut the car off but was the first thing that happened. I waited about 30 min and then finished my trip home (less than a mile). The next day I checked the coolant level and it was fine. I started the car and the temp gauge never stopped at the "normal" position. I took out the thermostat and replaced it. This seemed to fix my problem so I drove the car for 2 weeks with no problems and then my radiator hose from the water pump to the thermostat housing decided to bust open. Needless to say the car got hot again but not overheated. This time I had to get towed home, funny nobody sells these hoses on a Sat night. Now I go and buy a replacement hose and also the hose from the lower radiator to the thermostat. Well as luck would have it the lower radiator hose was out of stock but was able to replace the one I needed that day. Well then strike 3 happened, the lower radiator hose cracked open, a day before the new hose came in. I replaced this one the next day and everything I thought would be back to normal but as things go two days later I found water in the oil. I took out the spark plugs and it seems number 6 cylinder blew the head gasket. I then purchased a head gasket set and took my Bentley manual off the shelf. I took the head off and got it tested, they found it slightly warped and milled it and the timing chain cover. They also replaced the exhaust valve guides. I put everything back together and have a few problems. One, I have a huge oil leak between the front timing chain cover and the block (I lost 1/4 quart of oil in 14 miles, it seems that it dumps most of it when I shut off the motor, it even manages to squirt on the lower radiator hose). This should be obvious to fix but figured I would ask to see if there were any tricks that I should have done the first time. Second, the car idles rough and I am missing power above 2500 rpm. This second problem worries me more, I admit that I need a professional to adjust my valves, I tried for 2 hours to get them right but they still let me know that they need a better tuning. I asked and someone told me that I may have placed the cam in the wrong position causing both problems but I put the cam lined up with the head like the instructions said (along with having the lower end at TDC for cylinder number 1). The check engine light comes on erratically also, I got the code checked and it looks as if water and my O2 sensor did not get along with each other. Not sure if this could cause a problem or not but the check engine light does not say on. The only other hint of a problem is when looking for the oil leak I had the car in my garage and when I started it. It runs really rich, I could smell gas in the air like I spilled it all over the floor. I know this is part of the 02 sensor and just being cold but just giving as much information as possible to get my car back on the road.