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| | | | Joined: Jul 2007 Posts: 28 'Bolter | | 'Bolter Joined: Jul 2007 Posts: 28 | any advice or directions out there for removal of the camshaft on my 248? everything else has been removed. Just the camshaft and the timing gear remain. I don't see any obvious way to remove it without damage. Perhaps the secret lies beneath some grease. | | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | There are two screws behind the cam timing gear that you need to remove. You may need to rotate the crank/cam until you can see the two screws and yes they may be burried in the muck. | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Don't forget to pull all the lifters AND the fuel pump!
Stuart | | | | | Joined: Jul 2007 Posts: 28 'Bolter | | 'Bolter Joined: Jul 2007 Posts: 28 | forgive my lack of knownledge about part names. Although I have rebuilt boat motors and small engines I am just learning about auto engines. Are the lifters the cup shaped pieces that the push rods set in and the cams push? I have removed the rods already. If so, these are soaking in penetrating oil in hopes of loosening them up enough to remove without damage. | | | | | Joined: Feb 2004 Posts: 29,740 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,740 | Yes, those are the lifters. It's not uncommon for them to get slightly cup-shaped on the bottom and be hard to pull through the bores they ride in. Pull them up as far as they can go and the cam should slide out underneath them after removing the screws from the thrust plate. Then drive them out from the bottom side using a hammer and punch. A cupped lifter is junk and should not be re-used. Ditto for the cam they're riding on! New lifters have a slight convex shapr on the surface that rides the cam so the lifter rotates.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | John of Champlin,
Yes, the things the pushrods rest in are called valve lifters. They need to be removed or at the very least pulled up so the cam lobes can slither by as you pull the camshaft out. The fuel pump actuation arm is also resting on a cam lobe and it (the fuel pump) needs to be taken completely off the engine. The cam will not just pull straight out, it must be turned, supported and gently coaxed as it comes through its bearings.
Stuart | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | | | | | | Joined: Jul 2007 Posts: 28 'Bolter | | 'Bolter Joined: Jul 2007 Posts: 28 | Thanks all for the tips. Yeah, I know it has been a couple or three weeks. But that penetrating oil did it's job and the entire engine is apart without any damaged pieces. | | |
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