The 450 did not use the vent tube going from front to rear of head. It used a short tube in the rear hole and that was connected to the air cleaner inlet same as M's were. The governor still had vent tube to front of head but no fittings inside head. Poor man's pvc system that actually caused all the build up in the inlet tube of air cleaner and they kept using similar systems on the 6 cyl engines until they just said, put a plug in valve cover on those engines and pinch the tube going into air cleaner. I eliminated a lot of them over the years on the six cyl but just left factory type on the older four bangers.
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Today's Featured Article - Talk of the Town: How to Remove a Broken Bolt - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I have an aluminum steering gear housing with a bolt broken off in it. The bolt is about a 3/8" x 1 1/2" bolt. I've already drilled the center of the bolt out with about 7/64" drill bit the entire length of the bolt. Only one end of the bolt is visible. I tried to use an easy out but it wasn't budging and I didn't want t
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