|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
04-30-2024, 11:13 PM | #1 |
Senior Member
Join Date: May 2013
Location: Lake Forest, California
Posts: 247
|
Head stud to block
What is the thread size for the head stud into the block? I just test fired my rebuilt engine and warmed it up, then on retorquing the head, the front left stud at the water neck pulled loose from the block. I am hoping I can just pull the head and helicoil it. What size is the thread size at the block? Thanks!
On the plus side, it ran great!
__________________
Experience is a cruel teacher. It gives the exam first, then the lesson. |
04-30-2024, 11:19 PM | #2 |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,946
|
Re: Head stud to block
7/16-14 in the block. Other end of stud is 7/16-20.
|
Sponsored Links (Register now to hide all advertisements) |
|
05-01-2024, 06:01 AM | #3 |
Senior Member
Join Date: Jan 2012
Location: Western North Carolina
Posts: 4,143
|
Re: Head stud to block
The Helicoil will work just fine. It will provide more pull out strength than the original threaded hole. Only one thing to watch out for and that is the accuracy of drilling the hole for the tap for the Helicoil. This is best done with the head placed on the engine and using the bolt hole as a guide. Put the head down over the remaining studs but no need to fasten it down. If you are concerned about enlarging the bolt hole in the head, use an old scrap head. But the hole can be enlarged slightly without hurting anything.
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
05-01-2024, 07:04 AM | #4 |
Senior Member
Join Date: Jun 2010
Location: 34.22 N 118.36 W
Posts: 1,068
|
Re: Head stud to block
One last point to be concerned with here
Be careful to not drill too deeply The stud boss is fairly thin in the bottom and you do not want to penetrate into the water jacket
__________________
As Carroll Smith wrote; All Failures are Human in Origin. |
05-01-2024, 10:34 AM | #5 |
Senior Member
Join Date: May 2013
Location: Lake Forest, California
Posts: 247
|
Re: Head stud to block
Good tips—thank you! I will measure the hole depth and then use a collar on the drill bit to prevent going too deep.
__________________
Experience is a cruel teacher. It gives the exam first, then the lesson. |
05-01-2024, 11:11 AM | #6 | |
Senior Member
Join Date: Jan 2020
Location: SF Bay Area
Posts: 1,185
|
Re: Head stud to block
Sponsored Links (Register now to hide all advertisements)
Quote:
__________________
JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan Last edited by JayJay; 05-01-2024 at 09:47 PM. |
|
05-01-2024, 08:53 PM | #7 |
Senior Member
Join Date: May 2010
Location: N. GA
Posts: 534
|
Re: Head stud to block
A friend and I drilled and installed a helicoil for a head stud free hand today. We had 3 sets of eyes on the bit and tap as well as using a small square. We were concerned about being off but felt better when the head gasket slid right on and really relieved when the head slid on without any effort...
TOB |
05-01-2024, 09:46 PM | #8 |
Senior Member
Join Date: Jan 2020
Location: SF Bay Area
Posts: 1,185
|
Re: Head stud to block
I have one head stud that a previous owner installed a Helicoil slightly catawampus. When I install the gasket and head I have to remove several studs, install the gasket and head, then reinstall the studs using two jam nuts on the studs after the head and gasket are in place. All because I can’t get things to line up due to that off-kilter stud. Kind of a pain.
__________________
JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan |
05-02-2024, 04:01 AM | #9 | |
Senior Member
Join Date: May 2010
Location: VA
Posts: 1,454
|
Re: Head stud to block
Quote:
I used that insert on my motor and as mentioned above, used the head as a drill guide and checked the tap for squareness every quarter turn. It came out well. |
|
05-02-2024, 07:26 AM | #10 |
Senior Member
Join Date: May 2010
Location: Epping N.H.
Posts: 3,026
|
Re: Head stud to block
I still have a big assortment of those inserts from working on equipment.All the taps,and drill bits are kept in the assortment and not allowed out in the rest of the world.Mine are called Keenserts.
|
05-02-2024, 08:09 AM | #11 | |
Senior Member
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,941
|
Re: Head stud to block
Quote:
__________________
Dave / Lincoln Nebraska |
|
05-02-2024, 09:53 AM | #12 | |
Senior Member
Join Date: Jan 2020
Location: SF Bay Area
Posts: 1,185
|
Re: Head stud to block
Quote:
__________________
JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan |
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|