340 Head Bolt Question

News:

  • Home
  • Help
  • Chat
  • Login
  • Register

    • « previous next »
    Pages: [1]

    Author Topic: 340 Head Bolt Question  (Read 1772 times)

    Offline cwestra

    • Sr. Member
    • ****
    • Posts: 1120
    340 Head Bolt Question
    « on: September 07, 2009 - 01:10:31 PM »
    Do any of the head bolts go into water jackets on a small block 340 engine?
    Logged
    Corey - in Northern Indiana


    Offline Chryco Psycho

    • Administrator
    • C-C.com Guru
    • *****
    • Posts: 36620
    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: 340 Head Bolt Question
    « Reply #1 on: September 07, 2009 - 01:39:52 PM »
    no , that is a chevy thing , just the exhaust studs on the ends of the heads
    Logged

    Challenger - You`ll wish You Hadn`t

    Offline cwestra

    • Sr. Member
    • ****
    • Posts: 1120
    Re: 340 Head Bolt Question
    « Reply #2 on: September 07, 2009 - 01:44:08 PM »
    Quote from: Chryco Psycho on September 07, 2009 - 01:39:52 PM
    no , that is a chevy thing , just the exhaust studs on the ends of the heads
    Great.  Thanks for the quick reply CP. 
    Logged
    Corey - in Northern Indiana

    Offline Chryco Psycho

    • Administrator
    • C-C.com Guru
    • *****
    • Posts: 36620
    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: 340 Head Bolt Question
    « Reply #3 on: September 07, 2009 - 02:13:36 PM »
    No Prob :2thumbs:
    Logged

    Challenger - You`ll wish You Hadn`t

    Offline Moparal

    • Permanent Resident
    • *******
    • Posts: 13085
    Re: 340 Head Bolt Question
    « Reply #4 on: September 07, 2009 - 04:47:16 PM »
    As I recall there is one on each side that does. I believe the manual says to put sealant on that bolt too. But it's been a long time.  I do remember 1 long bolt on a 340 head bolt leaking water, it was into the valve cover
    Logged

    Offline cwestra

    • Sr. Member
    • ****
    • Posts: 1120
    Re: 340 Head Bolt Question
    « Reply #5 on: September 07, 2009 - 08:04:28 PM »
    How critical is it that sealant be applied to the bolt?
    Logged
    Corey - in Northern Indiana

    Offline Moparal

    • Permanent Resident
    • *******
    • Posts: 13085
    Re: 340 Head Bolt Question
    « Reply #6 on: September 07, 2009 - 08:10:02 PM »
    Some leak and some dont.  I have seen them leak after doing a valve job and re installing the heads. That's where I read it in the manual.  My friend found water in his oil one time after a rebuild and it was the same head bolt.
    Logged

    Offline cwestra

    • Sr. Member
    • ****
    • Posts: 1120
    Re: 340 Head Bolt Question
    « Reply #7 on: September 07, 2009 - 08:12:43 PM »
    Quote from: Moparal on September 07, 2009 - 08:10:02 PM
    Some leak and some dont.  I have seen them leak after doing a valve job and re installing the heads. That's where I read it in the manual.  My friend found water in his oil one time after a rebuild and it was the same head bolt.
    Mine are already tightened.  Is it too late to run that center (long) bolt out and put sealer on it?
    Logged
    Corey - in Northern Indiana

    Offline Moparal

    • Permanent Resident
    • *******
    • Posts: 13085
    Re: 340 Head Bolt Question
    « Reply #8 on: September 07, 2009 - 08:14:10 PM »
    no it's not to late. And I would do it. I sure wish some small  block guys would chime in for you. But I am pretty sure of this
    Logged

    wagesofsin

    • Guest
    Re: 340 Head Bolt Question
    « Reply #9 on: September 07, 2009 - 08:34:20 PM »
    Quote from: Moparal on September 07, 2009 - 08:14:10 PM
    no it's not to late. And I would do it. I sure wish some small  block guys would chime in for you. But I am pretty sure of this


    yes, you can remove it and apply some good rtv, you should have no further issues.
    just stuff the threads good.
    Logged

    Offline cwestra

    • Sr. Member
    • ****
    • Posts: 1120
    Re: 340 Head Bolt Question
    « Reply #10 on: September 09, 2009 - 12:43:10 PM »
    Quote from: wagesofsin on September 07, 2009 - 08:34:20 PM

    yes, you can remove it and apply some good rtv, you should have no further issues.
    just stuff the threads good.
    You wouldn't happen to know which bolt(s) are affected on my 340 do you? 
    Logged
    Corey - in Northern Indiana

    Offline moper

    • Resident
    • *****
    • Posts: 2368
    Re: 340 Head Bolt Question
    « Reply #11 on: September 10, 2009 - 12:45:59 PM »
    No small or big block mopar head bolts bolts hit water. They are all blind holes. Especially with small blocks, the holes should be fully bottom tapped and blown clean, and the bolt threads should be chased. If the block or heads have been milled, make sure teh bolts are not bottoming out in the holes as the depth can vary hole to hole by a bit. Start them by hand, lubing the threads with straight 30W oil, and torque evenly and smoothly in 3 increments to the spec (95lbs?). The last pull should turn the bolt more than 90° and should be done smoothly to the correct torque.
    Logged

    Offline cwestra

    • Sr. Member
    • ****
    • Posts: 1120
    Re: 340 Head Bolt Question
    « Reply #12 on: September 10, 2009 - 12:56:16 PM »
    Quote from: moper on September 10, 2009 - 12:45:59 PM
    No small or big block mopar head bolts bolts hit water. They are all blind holes. Especially with small blocks, the holes should be fully bottom tapped and blown clean, and the bolt threads should be chased. If the block or heads have been milled, make sure teh bolts are not bottoming out in the holes as the depth can vary hole to hole by a bit. Start them by hand, lubing the threads with straight 30W oil, and torque evenly and smoothly in 3 increments to the spec (95lbs?). The last pull should turn the bolt more than 90° and should be done smoothly to the correct torque.
    Great.  Thanks for the details, moper.
    Logged
    Corey - in Northern Indiana
    Pages: [1]
    « previous next »