Re: Anybody familiar with the Magnum motor?

Posted by JakeF on December 02, 2005 at 20:16:06 from (64.146.188.222):

In Reply to: Re: Anybody familiar with the Magnum motor? posted by P Backus on December 02, 2005 at 12:43:30:

The gear is some sort of steel and to get it off will require heat. I always pull the cam, but you have to keep from dropping any lifters as they are mushroom style and won't come out the top. To remove the cam all the lifters must be held up with wooden dowels during the process. As soon as I get the cam out I put a piece of cut in half PVC pipe in to catch one if it happens to fall out. So far I've never needed it but it is just a little insurance. If you do decide to pull the cam gear don't overheat it or it may not shrink back down to fit tight on reassembly. Our local dealer does the heat method and did ruin one gear, but has been successful many other times. Before you pull the head make sure to pull the injectors as they protrude out the bottom. Snap-on makes a puller or you can build one with the propper metric hyd. fitting. As far as the cooler, yes the oil PSI is greater, but they only leak one way sometimes, and when you shut the tractor off it has 15PSI on the cooling system until it cools. I would pull the cooler and have it tested at the local radiator shop. Hope this helps. Jake

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