| Author | Message | ||
     john |
chris you say water hose comes off to get manifold off where is that hose &heat sheild?what is it for ? thanks john | ||
| Chris Losey (Admin) |
The Hercules used in the 2150, 2050, 2-135 and 2-155 is a 2 head design. This is why there are 2 exhaust manifolds, and 2 water jackets. I'm not sure why there is only one intake manifold, but there is. I have a picture of my 2-155 from when I replaced the rear manifold on it. The manifolds are off, but I have put some arrows in for illustration.  The green line shows where the 2 individual heads meet. The red arrows point to the water ports that the water manifold bolt down to. There will be a gasket at each water port that you will need to replace. Coolant is pumped into the block by the water pump at the oil cooler, then pushes into the block, up through the heads, into the water manifold, and then to the thermostat. From there it either goes to the radiator if it is hot or back through the water pump if it is cold. The yellow star is where the 2 pieces of the water manifold meet. There is a hose that connects these 2 halves. Over the hose will be a heat shield to protect the hose from the heat of the exhaust manifold and turbo. It is just a metal covered piece of something or another that is somewhat flexible. Over time, the heat shield can break down, and so will that hose. The last replacement one I got from AGCO was made of Neoprene, which is much more durable than regular rubber, so it is worth the extra money to get the OEM part in this case. The big reason I mentioned this is you can't get to the top nuts on the exhaust manifold without removing the water manifold. At least I have never been able to. So while it is apart, (which is the only way to replace the hose), I would strongly recommend replacing that hose and heat shield. A little sealant like silcone smeared on the inside of the neoprene hose will make it seal a little better. That neoprene can be hard to get to seal, it is tough stuff. The yellow arrow points to where the front half of the water manifold attaches to the thermostat housing. This hose is much easier to get to, but you may still want to consider replacing it while it is apart. The blue arrow points to where the thermostat housing bolts to the water pump. There is a gasket here you will need. Other than that, you will need the intake/exhaust manifold gaskets (one for each head), a gasket for where the oil return line meets the turbo charger and the gasket that goes between the turbo and the manifold since you are replacing the front half. If you want to put a new thermostat in, the one I got at the car parts store was supposed to be the same as what goes in the Cummins for the Dodge pickups. I got one rated at 160 degrees and it was a perfect fit. Getting enough heat out of this engine usually isn't a problem, so I wanted it to be able to cool down better. If you order one from AGCO, it will be 180 degrees and more money to boot. I'll check today to see what manifolds I have on hand. |
