Head Stud Install Q
02-02-2008 | 12:00 PM
#2
Team Owner
Hi are you installing bolts? or studs that have threads on both ends? If bolts then no loctite, just a lite coat of oil.
if your putting studs in I would follow the MFG instructions and also consider getting a spare head gasket and torquing the head onto the block while the loctite cures. The studs should be fitted to the correct height as well, so 10 ft/lb might drive them to a deeper depth, or not enough measure the height of the old studs before you remove them.
Use the red its hi strength make sure the holes are clean and be careful about running a tap down the stud holes if its not a good tap IE it cuts metal out of the threads when you chase them stop and find another tap from another MFG or use an old stud with some grooves cut into the sides you really dont want to open up the threads in your block as the studs might fail do to a loose fittment.
if your putting studs in I would follow the MFG instructions and also consider getting a spare head gasket and torquing the head onto the block while the loctite cures. The studs should be fitted to the correct height as well, so 10 ft/lb might drive them to a deeper depth, or not enough measure the height of the old studs before you remove them.
Use the red its hi strength make sure the holes are clean and be careful about running a tap down the stud holes if its not a good tap IE it cuts metal out of the threads when you chase them stop and find another tap from another MFG or use an old stud with some grooves cut into the sides you really dont want to open up the threads in your block as the studs might fail do to a loose fittment.
Last edited by Mrmerlin; 02-02-2008 at 02:20 PM.
02-03-2008 | 02:09 AM
#3
Instructor
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From: Fairfax, VA
MrMerlin is correct. Make absolutly sure the tap holes are cleaned out. This will be a very time consuming process.
ARP sells a thread cleaning TAP or you can get a bottoming tap and have a machinist grind off the leading edge of the cutting threads. You can use another new stud and cut 2 grooves in the side 180 apart. (The crud needs somewhere to go) As Mr Merlin says..you do not want to cut any part of your existing theads. Make several passes with your cleaning tap, use WD40. Do not go to the next hole until you have thouroughly cleaned the hole your working on.
Also, JEGS sells wire brush sets. These guys can go deep inside the holes and clean them out. I did this before using the cleaning tap.
Use new 12 X 1.5 nuts. You can reuse the thrust washers. Use emery paper to rough up only one side of the washers. The roughed up side goes toward the head.
Big AL in VA
84 928S2 euro twin distributor monster
ARP sells a thread cleaning TAP or you can get a bottoming tap and have a machinist grind off the leading edge of the cutting threads. You can use another new stud and cut 2 grooves in the side 180 apart. (The crud needs somewhere to go) As Mr Merlin says..you do not want to cut any part of your existing theads. Make several passes with your cleaning tap, use WD40. Do not go to the next hole until you have thouroughly cleaned the hole your working on.
Also, JEGS sells wire brush sets. These guys can go deep inside the holes and clean them out. I did this before using the cleaning tap.
Use new 12 X 1.5 nuts. You can reuse the thrust washers. Use emery paper to rough up only one side of the washers. The roughed up side goes toward the head.
Big AL in VA
84 928S2 euro twin distributor monster