The intake manifold is just a hollow chamber that holds a cloud of gas and air. The pistons then draw the gas fumes into the cylinder as they go down and closes the intake valve. Then the piston comes back up where the gas fumes are compressed and the spark plug fires driving the piston down. Then on the next stroke the piston comes up where the exhaust valve opens and the burnt gas is let out through the exhaust manifold and then through the exhaust pipe. Because of the heat they couldn't just hook the exhaust pipes to the engine. The cast iron exhaust manifold dissipates enough of the heat the exhaust pipe can handle it.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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