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cam gear question

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Old Aug 7, 2009 | 07:55 PM
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From: Gardendale Al
cam gear question

Long story short, put an engine in my 98.5 24v truck. The engine was from a wreck, the timing housing is broken, leaks and the CPS doesn't work properly. The PS pump also hits the block, and is VERY tough to line up. Is there something else I should look at as well?
Heres my thoughts:
I have my old engine, and I am looking to swap the timing cover. I have to pull the cam gear off to do this, or so I assume.. Can anyone tell me how to get it off? I already have the IP off, and am planning on leaving the VAC pump on the housing as it is fine. Thanks in avance.

Jason
jbelcher337@bellsouth.net
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Old Aug 7, 2009 | 08:25 PM
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Rpainter's Avatar
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From: kearneysville wv
Originally Posted by jtb51b
Long story short, put an engine in my 98.5 24v truck. The engine was from a wreck, the timing housing is broken, leaks and the CPS doesn't work properly. The PS pump also hits the block, and is VERY tough to line up. Is there something else I should look at as well?
Heres my thoughts:
I have my old engine, and I am looking to swap the timing cover. I have to pull the cam gear off to do this, or so I assume.. Can anyone tell me how to get it off? I already have the IP off, and am planning on leaving the VAC pump on the housing as it is fine. Thanks in avance.

Jason
jbelcher337@bellsouth.net
usually have to pull the cam and press the gear off
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Old Aug 7, 2009 | 09:02 PM
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From: Dallas area
I do believe Cummins does have a tool for pulling the gear and leaving the cam in, but pulling the cam especially with the motor out of the truck is easy..
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Old Aug 8, 2009 | 05:17 AM
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From: Gardendale Al
The other one is in the truck.. Either way, whats the cam removal process?

Jason
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Old Aug 8, 2009 | 02:55 PM
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From: The Great Northwest!
Just remove the cam. Tales longer to try to remove a grear and reinstall than just yanking it.

Pull the rockers and stands off. Put them in the valve cover in the order hey come off. Use the filler end as the first set.

Insert wooden dowels into tappets, make sure they are tight and then lift the two adjacent tappets up at once. Use a rubber band or tape or whatever to hold the 2 ends together. This keeps them from falling down.

When all are up off the cam, unbolt the front retainer (stuff a rag in the front of the pan!) and pull out bolts and retainer. Now you can pull the cam straight out.

Replace the front cover and get that cam back in asap.

Dave
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Old Aug 8, 2009 | 07:58 PM
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From: Sunny Southern California Land of Fruits and Nuts
If you are going to remove camshaft you will need to hold the lifters up using dowels and rubber bands. If you don't the lifters will stop the cam from coming out. If you are installing a new gear it must be installed when heated to 350. If you press new gear on without heating the gear will crack. I had machine shop install gear after breaking two gears I asked them if they were heating the gear they said no. The third gear they did heat in oven and went on OK without cracking.
GEAR REPLACEMENT
1.Press the camshaft out of the gear.
2.Remove all burrs and smooth any rough surfaces caused by removing the gear.
3.Install the camshaft key.
4.Lubricate the camshaft surface with Lubriplate 105, or equivalent
CAUTION: The camshaft gear will be permanently distorted if overheated. The oven temperature should never exceed 177°C (350°F)

5.Heat the gear in an oven at 177°C (350°F) for 45 minutes
WARNING: WEAR PROTECTIVE GLOVES TO HANDLE THE HOT GEAR.

6.Install the gear with the timing marks visible. Be sure the gear is seated against the camshaft shoulder.
7.If the camshaft is not to be used immediately, lubricate the lobes and journals to prevent rust.
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Old Aug 8, 2009 | 08:00 PM
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From: The Great Northwest!
I hear an echo.....




Dave
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