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Paul hows the timing case on the Magnim coming

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JakeF

01-06-2006 19:06:28

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Just wondering if you got the cam in and out OK and found a wear ring installer. Jake

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P Backus

01-06-2006 19:36:32

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Re: Paul hows the timing case on the Magnim coming in reply to JakeF, 01-06-2006 19:06:28

Hi Jake,
It"s coming along. I got the cam out and in without much trouble and borrowed the wear ring installer from the dealer. At first they just gave me the seal installer and I couldn"t figure out how they used that for the wear ring. When I asked about it, they said I needed the other tool. DUH! I thought that"s what I asked for in the first place. Got .006 milled off the head. Valve train looks excellent, cylinders look excellent, cam journals are well within specs. Couldn"t find any cause of the antifreeze leak. I hope the new head gasket and milling take care of it. I put the head on tonight and torqued it down. Should those be re-torqued after running? It would be a real bear with all that stuff on top of the motor.
I replaced the oil pump. They charged something like $95 plus a $50 core, but then they only gave me $10 for my old pump. I thought that was odd.
When I disassembled the motor I found that the injection pump was out of time by one gear tooth and some of the valves had .045 lash. I"m hoping that I notice an improvement this next summer!
Thanks for asking and thanks for all your help! I may need more.
By the way, do you know of any of these that had coolant leaks through or around the sleeves? Dealership mech said he"s never seen the Cummins have those problems, just head gaskets usually.
Paul

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JakeF

01-07-2006 20:10:55

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Re: Paul hows the timing case on the Magnim coming in reply to P Backus, 01-06-2006 19:36:32

I'm hoping you have a book and followed the propper torque sequence for the type of bolt you have. If you have a pre 1991 you could retorque but I have never bothered and it's not called for. The 91-later get so much torque and then an additional 90 degres and can't be retorqued, there is no final value to go to. Hopefully you also checked the bolt free length and liner protrusion.

You should notice some improvement from the pump and valve lash. I adjust ours every 1000Hrs and test the injectors every 2000hrs. I only replace the injectors if they test bad or half of the set fails I'll replace them all, and usually they go 4K between replacement on a C series. I do run the engine and then recheck the valves after the initial run to make sure they are all still in speck after the dowels were in the followers. I've only ever had one valve that changed, but it was at .040+ I rigged up a vaccum hose to clean out the follower and got a wood chip from one of my dowels that was holing the pushrod before running but it got smashed when I ran the tractor.

Usually they just leak on the right hand side from the headgasket at the rear, but I have seen one that had a leaking liner O-ring. It's easy to check with a pressure tester and the pan off though. Jake

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