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Head studs.... DIY??

14K views 47 replies 16 participants last post by  Nsangueza  
#1 ·
Hello fellow cummins fanatics... I'm wondering on the labor involved in upgrading the head studs. In my experience, different motors require different methods... Meaning, in my Supra it's recommended that I lift the head and replace the head gasket as well when doing such a job but in my evolution it was ok to just do head studs with the head on provided you follow a particular pattern of replacing them.

Now to the cummins 6.7, is it recommended I lift the head and clean everything out and replace the head gasket as well or can I just replace the stock ones with the head on the block? If yes, it will save me a ton of work... Lol I'm a lazy mofo... :)

Thank you much in advance for your assistance and feedback.
 
#3 ·
Thank you for the pdf Chrisminx

I have been meaning to find instructions for adjusting the overhead on these 6.7 Cummins. Since I'm past 100,000 miles I'm going to check mine soon.
 
#7 ·
Chris,
Thank you, thank you, thank you for posting the instruction, I just post a lot of question asking everything that is covered in the installation instruction you posted. This "olde Salty Chief" can go back to removing the cylinder head. If you were close I'll buy you a beer of your choice.
 
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#15 ·
I used the ARP 2000s, guys are going to jump on here and say nothing but ARP 625s will hold but there have been a few guys on here to hold close to 800hp with the 2000s. I guess time will tell for me.


Ouch, think I'll take the sore back n arms route:thumbsup:
The way I looked at it was the savings in labor paid for my Air Dog 200. :party018:
 
#21 ·
my turbo just blew an as of right now i have the turbo an mani off an the head exposed.just got my arp 625s in.im takin it real slow on the head stud install only problems ive ran into is lots of oil in the passenger side head studs and it bieng a little more harder to screw the stud down. but so far the install is going smoothly!
 
#23 ·
which ones are the "2000's''? does James at rollin smoke sell them?
 
#25 ·
looks like ill go with the 2000's. I cant justify spending $2100 on studs, and i won't be pushin anymore the 34-35psi of boost.
 
#26 ·
^^^ i meant $1200 haha.

but on a serious note, is there a difference between the ARP 2000's and 425's? my local parts shop only carries ARP 625's and 425's for the 6.7L so i'm assuming the 2000's and the 425's are the same thing? any ideas?
 
#28 ·
quick question, should i replace the head gasket since i'm doing the studs? mine is not leaking or anything. I don't plan on removing the head but if i should replace the gasket i will.
 
#31 ·
what method did you use? gdp??? and after you got to 150ft lbs did you loosen and retighten 4 times??? just curious i'm doin it right now and need all the help I can get..... done so much search I cant see straight... thanxxx..
 
#33 ·
so i started installing my 425's when i notice that the little black plastic on top of one of the injectors broke off, Must have hit it with a wrench or what ever. is this injector garbage now?

the little black plastic piece at the top between the 2 gold pegs.
 

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#35 ·
Someone else might chime in with better info but I've been running one on my 5.9 like that for a few thousand miles with out any issues. What I can tell you if it bothers you, you can get it repaired, its not junk.
 
#36 ·
whats the purpose of that piece? just to separate where the 2 wires bolt on?
 
#37 ·
I broke my plastic piece when I was on my last torque. It's just to keep the wires from touching. That's all. Will the wires have a chance to touch?