Ol Yeller wrote:
Have you had your belt drive off and on recently. I ask because if don't let the lower belt drive pully float on it's shaft you'll put a lot of pressure on the rear main crank bearing on you engine. This will cause overheating that's hard to figure out and also eventually wipe out the crank bearing leading to a loss of oil pressure. Don't ask me how I know this.
So I should let off the pressure and turn it over a few times? Care to give me some instructions on how to do that? I bought it set up this way and have only done maintenance to it,
Overheating was a little problem from day one but has got worse until last time I ran it. Problem #1 the boat is in Minnesota and I am in Miami. So when I first bought it the temp gauge would go to 200 - 210 even with the 180* T-stat but didn't boil it out the relief/ blow over hose until the last time I ran it last November. So now with all the help and comments, I have a few things to check out when I get back up there. First the gas,,, cause I first thought the 2 things were related, RPM loss and overheating, so now I can see if new gas fixes one problem,
and the tester Ted recommended should rule in or out the blown head gasket, a valve on top of the T-stat housing should clear the air,
Just a note: This weekend I was looking at a friends SBC 350 dd that had a Radiator cap mounted on top of the T-stat housing with no expansion tank, so that cap was the high point in the cooling system, we rode all day and he had no problem.
1. First I tried no T-stat, then new T-stat 180* (3 years ago now) ran over 200* then...
2. Put a wrap on the headers to try get more heat out away from the engine. not much change with that either...
3. Changed all the hoses and flushed the system and put new antifreeze.
4. So this year I bought a new water pump, thinking maybe it was degrading and going bad, which I haven't gotten to do yet...
5. Then I've been told Headgasket could have started with small leak and gotten worse to now gets over hot real quick.
6. Maybe when I flushed it I didn't get all the air out when I put back in new coolant and the old gas got water in it,,,and no longer combustible enough
I'll Let you all know what I find when I know more.
I may have more questions when I start working on it in 3 weeks.