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Old 06-10-2018, 11:06 AM   #1
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2004 3126e

Hello,
Can anyone absolutely verify the valve lash clearance specs for this engine. I have found doc's on the web saying .003" intake and exhaust, other videos saying .015" intake/ .030" exhaust??????

Yes I can call a Cat dealer tomorrow however, I have it in the building after cleaning the CAC and radiator and wanted to check the valve lash today.

Any info would be appreciated.

Thanks!
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Old 06-10-2018, 11:19 AM   #2
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Well I guess there is a lot of info out there , the pdf I have of the maintenance manual for military versions of the 3126E says 0.015" intake and 0.025" exhaust. I'm assuming engine cold, that's how Cummins engines are done.
Someday I'll figure out how to separate sections out of a pdf for posting .
I'll bet there's an app for that.
The pdf is 5X the forums posting limit.
PM. me your e mail if you'd like it.
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Old 06-10-2018, 11:23 AM   #3
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My 3126B has a silver sticker on the valve cover with the valve clearance and many other parameters printed on it.
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Old 06-10-2018, 01:31 PM   #4
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Quote:
Originally Posted by discovery39s View Post
Hello,
Can anyone absolutely verify the valve lash clearance specs for this engine. I have found doc's on the web saying .003" intake and exhaust, other videos saying .015" intake/ .030" exhaust??????

Yes I can call a Cat dealer tomorrow however, I have it in the building after cleaning the CAC and radiator and wanted to check the valve lash today.

Any info would be appreciated.

Thanks!
George,
Your coach must have been in production or, on the production line, very close to ours. Ours too is an '04 but, it has the C-7 330HP instead of the 3126. And, like the other poster stated, ours too has an I.D. tag on the engine that does state the valve lash. It's in "mm" so, I had to convert. So, for our C-7, the intake is, .38MM or, .0149 or, 15 thousandths and, the exhaust is, .64MM or, .025 thousandths.
Scott
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Old 06-10-2018, 04:57 PM   #5
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Thanks everyone. YES, the info label was missing on the valve cover. However, the previous owner had kept it with the engine docs in the folder. It did confirm what Fire Up had shared.

I did find a couple .002"-.003" over the exhaust limit and all six .003" over the intake limit. Much quieter now when cold. She had just a bit to much clicking in my ear!

Advance AP stocked the Felpro gasket set for 19 bucks. Everything is back together(along with cleaning the entire engine compartment) and humming.

Thanks again!
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Old 06-10-2018, 10:14 PM   #6
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Quote:
Originally Posted by discovery39s View Post
Thanks everyone. YES, the info label was missing on the valve cover. However, the previous owner had kept it with the engine docs in the folder. It did confirm what Fire Up had shared.

I did find a couple .002"-.003" over the exhaust limit and all six .003" over the intake limit. Much quieter now when cold. She had just a bit to much clicking in my ear!

Advance AP stocked the Felpro gasket set for 19 bucks. Everything is back together(along with cleaning the entire engine compartment) and humming.

Thanks again!
That's great that you got it done yourself. Outstanding. And frankly, I'm kind-a flabbergasted that a regular auto parts store would have CAT engine valve cover gasket in stock. But, good for you.
Scott
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Old 06-20-2018, 02:28 PM   #7
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Orielly auto parts has a lot of the parts for the cat 3126 and i would guess the c7.

Has to be looked up by the store clerk but i have bought a few there and always amazes me too
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