Results 1 to 4 of 4

Thread: Arp head studs

  1. #1
    Join Date
    Apr 2001
    Location
    Festus, MO.
    Posts
    173

    Default Arp head studs

    SO it looks like the head gasket / cracked head issue as raised it's ugly head in my garage. Disappearing coolant, dead cylinder at start up that goes away after a few min, etc. Could be a lot of things but my luck will include pulling the heads.

    So if that becomes the case, what is everyone's opinion of the arp head studs in our engines?

    Yes I have a Kennedy chip and GM8 turbo, cooling upgrades, main stud girdle, etc.

    It had head gaskets replaced under warranty and prior to the mods just before 100k. Has 215k on it now.

    Big Green

  2. #2
    Join Date
    Feb 2012
    Location
    Pauline, SC
    Posts
    576

    Default

    If you plan to keep things at stock levels the TTY bolts are the way to go, and you need to use a new set..

    Now if you plan to up the boost and fuel studs MAY be needed, but beware, if you use the sealer ARP recommends they will leak water through the threads and water down your oil...

    I do use them in customer builds but I take several steps to ensure they stay sealed and don't leak water...
    1993 Chevy K3500

    owner - Twisted Steel Performance

    porting, ceramic & powder coating

    like us on Facebook

  3. #3
    Join Date
    Feb 2000
    Location
    Montana
    Posts
    10,794

    Arrow

    The recommended Fel-Pro head gaskets were engineered to work in conjunction with the Fel-Pro TTY (Torque-to-Yield) head bolts. These bolts provide for a somewhat elastic clamping load that automatically compensates for thermal expansion and the effects of time. Studs work great for a performance engine that is seeing extreme combustion pressures, but they aren't necessary for even a performance 6.5L turbo diesel because of the limited fueling capability of the DS/DB fuel injection pump. As a way of reinforcing that fact, we know that even the Duramax uses TTY head bolts.

    Our 6.5TD Power Project engine (18:1 pistons, marine fuel injection system and all the rest) was assembled using Fel-Pro head gaskets and Fel-Pro TTY head bolts using Fel-Pro's and our own recommended procedure. That engine delivered perfect service approaching nearly 300,000 miles before it was sold to an out-of-state buyer. During that 7 year period and all those miles, the head gaskets were never a problem.

    So, studs are not necessary on a 6.5. Personally, I'd put that stud money into a Holset turbocharger, for a much better return on investment... Jim
    Last edited by More Power; 03-04-2021 at 10:52.

  4. #4
    Join Date
    Oct 2001
    Location
    Granby, Missouri, USA
    Posts
    2,827

    Default

    From everything I've read (no personal experience), using head studs on a 6.5L are very, very tricky to seal up and prevent coolant from leaking. I personally would stick with new TTY bolts.

    Casey
    1995 K1500 Tahoe 2 door, 6.5LTD, NP241, 4L80E, 3.42's, 285/75R16 BFG K02's; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, Turbo Master, 3.5" Kennedy exhaust, F code intake, '97 air box; dual t/stats, HO water pump, Champion radiator; Racor fuel filter; 368K miles and running strong!

Similar Threads

  1. ARP head studs
    By sctrailrider in forum TDP Classified ad forum
    Replies: 1
    Last Post: 04-08-2018, 17:51
  2. Cheapest ARP Head Studs on the web!
    By tbreddiesel in forum General Advertiser's Forum
    Replies: 0
    Last Post: 07-24-2013, 10:47
  3. ARP HEAD STUDS or STOCK HEAD BOLTS
    By 9365turbo in forum Duramax 6600
    Replies: 21
    Last Post: 03-31-2010, 12:50
  4. arp head studs
    By brian wafer in forum 6.2L Diesel - Tech Support - Troubleshooting - Performance
    Replies: 3
    Last Post: 02-14-2008, 18:53
  5. Arp Head Studs
    By tom yuenkel in forum 6.2L/6.5L Diesel - Upgrades & Service Questions Answered
    Replies: 14
    Last Post: 03-22-2007, 10:34

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •