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How much will it cost me to change the head or head gasket?

Discussion in 'GM 6.5 Diesel Engines' started by jrsavoie, Apr 25, 2010.

  1. jrsavoie

    jrsavoie Recruit

    How much will it cost me to change the head or head gasket?
    The 94 Dually is losing coolant. About a gallon every 2000 miles.
    It starts a little ruff with some white smoke then smooths out rather quickly and runs good.
    I haven't checked the glow plugs yet for uneven dis colorization. Or the compression.
    I'm guessing a cracked head or head gasket problem.
    It is not going into the pan. It is also not leaking that we can tell. No drips. running or parked. And the hose is not getting hard.
    I have done no investigation yet.

    How much does it cost to get a head checked?

    How much will a replacement head be?

    How much for everything needed to change the head gasket?

    How much more are studs than head bolts?

    Thanks
    Jeff
     
  2. Burning oil

    Burning oil LeroyDiesel.com Vendor

    8,523
    397
    Jan 3, 2009
    Houston
    Obviously you want to investigate to pin point the leak first. I had my truck leaking and for about a month I assumed it was the head gasket. When I had time to look at it more closely it turns out it was just a rusted freeze plug with a tiny hole in it.Maybe you will get that lucky too.
     
  3. jrsavoie

    jrsavoie Recruit

    At a gal every 2000 miles would I have a noticable leak? Something that would drip if I let it run for an hour over concrete after it was warmed up?
     
  4. 625fireman

    625fireman I have injecter-itis

    1,029
    0
    Dec 10, 2008
    NE Ohio
    Thats nota whole lot. Could be a pin hole you are not seeing some where. Check all connections for the coolant lines. Definatly the (*%^$#$@ quick conects on the heater hose. These thing will pisss just a little for a long time.
     
  5. bison

    bison Well-Known Member

    I would check for wet at the firewall and under the pass side floor mat(leaking heater core) and engine bay firewall heater hose/connections,it could drip right on the downpipe and evaporate without one seeing it.

    A coolant pressure test should reveal a pinhole leak any where external,quik connect,waterpump,freeze plugs,rad, etc
     
  6. bk95td

    bk95td 6.5 nut job/addict

    2,548
    3
    Nov 26, 2008
    ARP head studs about $130 from summit racing.Crappy tty head bolts about $60. Fel-pro head gaskets about $28 each at napa. Small can of "the right stuff" and intake and misc. gaskets $50. Cloyes timing set $70 summit racing. Or you could try the gm tablets like mudbath did. If you head gasket was leaking into the cooling system it would be over pressurizing it.
     
  7. jrsavoie

    jrsavoie Recruit

    I'm sure there are directions for a coolant pressure test here. Since I'm lazy does anybody know the test pressure off the top of their head? 5 lds. rings a bell. I just don't know if it's the right bell.
     
  8. ak diesel driver

    ak diesel driver Well-Known Member

    9,841
    109
    Feb 7, 2009
    alaska
  9. Burning oil

    Burning oil LeroyDiesel.com Vendor

    8,523
    397
    Jan 3, 2009
    Houston
    You can rent the tool from auto zone loaner tools. Pump it up to 15-16 psi and check for leaks. The tool also test the cap.
     
  10. WarWagon

    WarWagon Well it hits on 7 of 8...

    5,795
    248
    Nov 15, 2009
    AZ
    Sample both the engine oil and the trans oil. Radiator intercooler failure?

    Look at the radiator and where the tubes go into the tanks. A pinhole gets dried by the fan.

    Look at the block heater.

    Check water pump weep hole.

    Test or replace the radiator cap. A weak cap will pop off and loose coolant esp. after shutdown at random times.

    If the oils test clean ask yourself if the cost to fix the leak is worth it? Coolant is cheap. As is the advice for stop leak.
     
  11. Acesneights1

    Acesneights1 New Member

    10,018
    3
    May 5, 2008
    Northeast CT
    GM Tabs work very well in your situtation. They were designed to be normal PM for the 4100 Aluminum motors. I have used them in these engines with great results. HG's are more than 28$ each from Napa, more like 60. I just bought a set. ARP studs are nice....But bear in mind...You may have to pull the engine to use them. I am not sure on NBS trucks but on OBS trucks like my Burb there is no way you are getting the heads on or off with studs without pulling the motor and unless you are beatig the balls off it, TTY bolts are fine. It's not a bad job. Probably got those shitty felpro printo seals in it. Garbage. I'd do the GM tabs first though. If it plugs the leak , you are NOT hurting anything by driving it. They lasted 3 yrs in my old 83 with 6.2 and were STILL holding when I sold the truck.
     
  12. jrsavoie

    jrsavoie Recruit

    Thanks I'll try the GM tabs after I look at it some more & do the pressure test.
     
  13. bk95td

    bk95td 6.5 nut job/addict

    2,548
    3
    Nov 26, 2008
    I've boughten 4 head gaskets from napa in the last year. Under $30 each. Arp head studs can be installed with the engine in the truck. 2 or 3 on the passenger side near the a/c box ,need to be put in the holes in the head before putting in place. All the rest can be screwed in with the head in place.):h The tty bolts don't retain their torque value under heat and vibration and are one time use only. ARP head studs are reuseable.
     
  14. Matt Bachand

    Matt Bachand Depends on the 6.5

    5,330
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    Jun 10, 2008
    Worcester, MA
    So if you don't have A/C could you pull one out at a time and replace it with Studs?
     
  15. Acesneights1

    Acesneights1 New Member

    10,018
    3
    May 5, 2008
    Northeast CT
    You must get a good deal. I paid 60$ a piece. I almost shit when I saw the bill and that was with Municipal Discount.
     
  16. So any news 3 + years later?
     
  17. jrsavoie

    jrsavoie Recruit

    I sold that truck and bought another. The guy that bought it had the problem get much worse and sold the truck again. Next guy put a lot of work and time into the truck and made it a nice vehicle again

     
  18. We won't be selling this Sub any time soon. I own several others, and for what I paid, $2800 + new wheels tires $1100, + paint $1000, it's a great truck except for the engine trouble. Tranny will prolly be next, reverse is slow, but my mechanic (who I hope will do the engine work) is also a tranny specialist, and maybe I can talk him into pulling the tranny and going thru it as it is prolly original and has over 252k. Reverse is very slo, but he says the reverse band pin is length is adjustable, but seeing as these go 150-200, and he's 400 miles away, mite as well do it when the timing is good.

    Here's a link to him as his videos of rebuilding a tranny for me and a spare for his '72 Vista Cruiser

    http://www.youtube.com/watch?v=aAHlyq4JjvU

    http://www.youtube.com/watch?v=RticeBJFYQQ
     
  19. We won't be selling this Sub any time soon. I own several others, and for what I paid, $2800 + new wheels tires $1100, + paint $1000, it's a great truck except for the engine trouble. Tranny will prolly be next, reverse is slow, but my mechanic (who I hope will do the engine work) is also a tranny specialist, and maybe I can talk him into pulling the tranny and going thru it as it is prolly original and has over 252k. Reverse is very slo, but he says the reverse band pin is length is adjustable, but seeing as these go 150-200, and he's 400 miles away, mite as well do it when the timing is good.

    Here's a link to him as his videos of rebuilding a tranny for me and a spare for his '72 Vista Cruiser

    http://www.youtube.com/watch?v=aAHlyq4JjvU

    http://www.youtube.com/watch?v=RticeBJFYQQ
     
  20. even though it's an old thread, I just put NEW Peninsular heads on. 1300 and shop labor was 2390 and change. That was 89 an hour and there were some parts on that cost. I supplied the heads through Peninsular. Hmm, parts. Head gasket, bolts, and incidentals. Bolts are 30 bucks and Arp studs 180 on Ebay.
     

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