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Old February 20th, 2015, 09:20 AM   #1
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Default Cummins tear down

Anyone have a link to a good write up to pull the head off a 6.7L cummins.

Or any pro tips?

I was just told that there is some plugs in the cowl that need to be pulled to get to the push rods for cylinder 5 & 6. And apparently a fuel return line on the back of the head.

I've never worked on a diesel engine before so I'm kinda leary about doing this job myself but with the price of it I am forced to work on it myself
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Old February 20th, 2015, 10:16 AM   #2
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Found a nice write up
http://www.cumminsforum.com/forum/07...ving-head.html
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Old February 20th, 2015, 10:36 AM   #3
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Don't forget to check YouTube, probably some good vids.
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Old February 20th, 2015, 01:46 PM   #4
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What... you don't have to take the cab off ??
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Old February 20th, 2015, 02:21 PM   #5
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I have never done a 6.7, did my 5.9 and it was pretty dam easy. Yes, there are plugs in the cowel, we learned this the hard way and bent a push rod in the process. On my 5.9 i was able to leave everything attached on the exhaust side and simply unbolt the manifold from the head and let it flop over and be supported by the exhaust....saved a bunch of time not taking the turbo and everything else off....i bet you can do the same on a 6.7. Have the cherry picker ready....the head is fucking heavy lol.
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Old February 22nd, 2015, 02:45 PM   #6
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That was a lot of work.
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Old February 22nd, 2015, 03:03 PM   #7
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What did u find? Cylinders look OK?
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Old February 22nd, 2015, 09:02 PM   #8
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They look like cylinders to me!
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Old February 22nd, 2015, 09:07 PM   #9
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anyway to bore it out to a v8?
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Old February 22nd, 2015, 09:10 PM   #10
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Only a v8?
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Old February 22nd, 2015, 09:17 PM   #11
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After hauling out to cali and back i gotta say its just stupid how much power this thing puts down. No need for more cylinders lol
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Old February 23rd, 2015, 08:04 AM   #12
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Quote:
Originally Posted by Mr. Beefy View Post
After hauling out to cali and back i gotta say its just stupid how much power this thing puts down. No need for more cylinders lol
Just more reliability right?
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Old February 23rd, 2015, 08:48 AM   #13
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I know where your headed with that little

The reliability was JUNK before I added all the goodies to it. It was at the dealership 5 times in 6 months due to DPF / EGR issues. Since I've tuned it only problem I had was torque converter and now this not bad for 60,000 miles of mostly me driving like an asshole.
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Old February 23rd, 2015, 09:04 AM   #14
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mpg average before and after mods? city/highway - empty/loaded ?
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Old February 23rd, 2015, 09:07 AM   #15
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Originally Posted by Mr. Beefy View Post
I know where your headed with that little

The reliability was JUNK before I added all the goodies to it. It was at the dealership 5 times in 6 months due to DPF / EGR issues. Since I've tuned it only problem I had was torque converter and now this not bad for 60,000 miles of mostly me driving like an asshole.
I wasn't headed anywhere, I was just poking at you because it makes me feel more like a man.

You work that truck pretty hard, I'm not surprised you've ran into some hick ups with it. It's not just an emtpy ricer diesel truck that tows occasionally.
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Old February 23rd, 2015, 09:19 AM   #16
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It's all good, I get a lot of people that give me shit about tuning a truck that I drive across the country. But in reality I trust it more tuned than when it was stock.

Cummins had a damn good motor with the 5.9. With the 6.7 they gained displacement and lost horsepower and mileage, thank you EPA. I went with the 6.7 just because I was impatient and didn't want to look for another one in my price range.

Oh and it needs stacks n boggers
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Old February 23rd, 2015, 09:49 AM   #17
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I dont see you mentioning that you ran it cross country on the 250hp tune lol
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Old February 23rd, 2015, 10:16 AM   #18
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I didn't install that tune for a reason My hot tune is 175

But I figured it was implied when I wrote "not bad for 60,000 miles of mostly me driving like an asshole."
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Old February 23rd, 2015, 10:21 AM   #19
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What is the problem that required a tear down?
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Old February 23rd, 2015, 10:22 AM   #20
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Blowing coolant from the reservoir.
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