ryan953267
Plastic
- Joined
- Sep 12, 2019
hello everybody. this is my first post so if this is in the wrong place please feel free to move it.
ive come across a very frustrating issue with an aluminum engine block and im picking at straws here on how to fix it.
my issue is that the engine is to use ARP main cap studs which are to be torqued to 90ft/lb. one particular hole just continues to strip out before reaching the finish torque. first it stripped the aluminum threads in the block, then it stripped the helicoil, then pulled the BIGSERT out from the outside aluminum threads.
ive got maybe a .08" wall on 2 sides so i cant really drill it out and try a third time thread repair which im not even sure they make... in order to have this tig welded i would have to cut the block out from the side and have the hole filled and have the block patched once the hole is filled. id really like to try and avoid cutting the block up that much if i can find another solution first.
my next thought was to turn down a stainless steel sleeve and shring fit that into the aluminum hole and use either loctite 608 or 640 similar to how cylinder sleeves are installed. my only concern is that i have little experience in engneering this sort of thing and am worried that the sleeve might be "pulled" out by the reciprocating forces of the crankshaft.
any thoughts on the shrink fit sleeve idea would be great but im open to any other suggestions i can get as well.
the stud is an ARP 10x1.25 thread and yes ive checked the torque wrench as well. all other holes ended up fine except this one...
ive come across a very frustrating issue with an aluminum engine block and im picking at straws here on how to fix it.
my issue is that the engine is to use ARP main cap studs which are to be torqued to 90ft/lb. one particular hole just continues to strip out before reaching the finish torque. first it stripped the aluminum threads in the block, then it stripped the helicoil, then pulled the BIGSERT out from the outside aluminum threads.
ive got maybe a .08" wall on 2 sides so i cant really drill it out and try a third time thread repair which im not even sure they make... in order to have this tig welded i would have to cut the block out from the side and have the hole filled and have the block patched once the hole is filled. id really like to try and avoid cutting the block up that much if i can find another solution first.
my next thought was to turn down a stainless steel sleeve and shring fit that into the aluminum hole and use either loctite 608 or 640 similar to how cylinder sleeves are installed. my only concern is that i have little experience in engneering this sort of thing and am worried that the sleeve might be "pulled" out by the reciprocating forces of the crankshaft.
any thoughts on the shrink fit sleeve idea would be great but im open to any other suggestions i can get as well.
the stud is an ARP 10x1.25 thread and yes ive checked the torque wrench as well. all other holes ended up fine except this one...