Quote:
Originally Posted by Bandit102
My DD50 (500hp) has done this twice. Load her up, you lose water. Run at high idle, whatever you want to do to make it leak at the shop, no way. Never heated at all. Both times, we pulled the head and found a leak between 3 and 4. I'm told this does not happen, but when you remove the head from my detroit, the block sags about .011" in the middle. We have to remove the pan and jack it up in the center when doing the head. That's my experience with the same symptoms. Oh, the last time it did finally get bad enough that it would bubble some in the radiator tank at high idle. We used the fluid and the suction pump thing that you put in the radiator and NEVER detected combustion gasses in the cooling system, but the head gaskets were bad nevertheless.
we'll assume you mean series 60 as this engine has 500hp
so...., how much sag was there after jacking up the block? ... the head DOES NOT hold the block up, despite what you've been told
there must be exhaust gases in the coolant for the blok-chek to work. it can be helpful ....... there is no 'see-all, tell-all' tool for this problem, it's a process of elimination