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Hastings, Florida | Have a 2001 N-14 with an oil leak. Engine has close to a million miles, runs excellent.Oil samples are fine.
Have an oil leak, about a gallon every 1500 miles, mechanic says seems to be coming from behind starter, cam follower gasket.
Now I have had cam followers replaced before on other Cummins, but they had to be jig timed.Big pain.
Just replacing gaskets on one follower, I hate to go to all that trouble. I have seen others mic the follower for thickness of shim gaskets, and use the same thickness gaskets when I go back together.
Would you Cummins Wizards use the micrometer to measure existing gaskets, and duplicate, or any other ideas ? Would you replace the single follower with a new one ?
Any thoughts ? |
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Lincoln, North Dakota | There's only one gasket |
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Pierce county WI | I've seen it done. Check the torque on the bolts before you pull the follower, then Mic it. Torque the same |
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Hastings, Florida | There are different thickness gaskets available, changes timing on those 2 cylinders. |
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Dearfield Co. | I have done it but dont like to------------if you change the follower you have to. Then sometimes to get the timing equal Cyl to Cyl you have to sand the gasket so one end can be off doing it this method |
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Mount Vernon, WA | I'd start by tightening the bolts, since there's no good reason for those things to be leaking in my opinion.
If you do decide that the gasket(s) need to be replaced, I would simply measure the old gaskets and replace with the same thickness. Avoid replacing the cam followers if at all possible, because then, by rights, you DO need to time it. It's a complex process if you've never done it before, and it takes some special tools to do it right.
According to Cummins QuickServe, gaskets are available in thicknesses of .007, .017, .022, & .030". |
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Mount Vernon, WA | Sand the gasket?? I don't understand why you would want to do this. |
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Dearfield Co. | You changed your post about only timing one cyl per follower and my post to that left--------------the machining on the follower housings can be off a few thousandths as well as a scotch brite pad can remove enough material on the block to make them out enough they arent smooth running as they can be. You gently remove a little off of half the gasket to get the timing close to perfect as you can. Done it for years on all cummins that needed it. Even though cummins claims the N-14 uses all new follower housings on the rebuilt we have found some that are off.
should also add it sucks when you find one that this needs done on as it will add a fair amount of time to the process----------
Edited by a4t-1600 5/24/2016 22:48
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Mount Vernon, WA | Sorry for the removed post. After I edited my second one, it moved the first one to a different location for some reason, so I had to replace it.
All that said, I still don't understand why a person would need to sand half a gasket. Cummins says you only need to check one cylinder for each follower. It stands to reason that if everything is machined properly, that would make sense. The only adjustable timing variable other than the cam key is the gasket, and it spans two cylinders.
I'm not faulting you for what you're doing, I just don't see why it is necessary. The cam timing needs to be close, but not that close. Cummins would never recommend that. |
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Dearfield Co. | Just the way I was taught and I continue to do so----------If your work ever makes it to some one like Mollison it will be scrutinized so we do it for that reason as well. Is it necessary ?? not for most people but we try to just be a little better in certain arenas . My big cams and N14s at one time had a pretty high standard and reputation to uphold. Not so much any more since they haven't been built in a road truck for years. Just my method LOL
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| We have the same year N14 with about the same miles that was leaking in the same place. I tried tightening the bolts and it stopped the leak. I dropped the starter to get more room and had to unhook a fuel line. It is worth trying first before having to retime it. |
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Dearfield Co. | Bern I should add to the timing story -------------After I went to bed I was thinking back and also remembered after market cams are harder to get timed than factory ones and they account for some of the timing issues. They are better than they used to be though. . Tolerances on them must not be as good as a factory can which helps in the sanding world |
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Hastings, Florida | Thanks to everyone. I will post the outcome next week after we do the deed. |
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Hastings, Florida | Bolts were loose on the rear cam follower, had to remove starter to tighten.
Thanks to all. |
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Dearfield Co. | good deal --------hopefully it is dry now |
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Mount Vernon, WA | Thanks for the update. Still have the Ford 5000? |
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Hastings, Florida | You know, Bern, I was wondering if you remembered that.About 15 years ago, and on another internet sight ( I think ), you gave me some daggum good help with a Ford 5000 tractor. Thanks again.
Yep. tractor been sitting about 3 years, talked to mechanic last week about getting it up and running to pull a mower. All it really needs is a new hydraulic pump and a battery. Those 5000's are a tough tractor. |
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N-14 Cummins question
