Been noticing a little oil in the cooling system on my '93 300SD.I know about the rod bender thing and have been half heartedly looking for a replacement. The car is not running hot or overheating,though it was loosing a little coolant,found a leak at the duovalve and fixed that.I noticed that the hoses are extremely hard after 30-45 min in town driving.I can remove the cap after it sits overnight and there is still pressure in the tank.I'm thinking about changing the head gasket,but I've never done a diesel,plenty of gas though.Is it a royal pain to do,it does look much worse than most other OHC 6cyl.Is there anything that I should look out for besides the normal,(cracked,warped,bad seats,etc),any tricks you can share?
Thanks