Stripped Head Bolts HELICOIL TIME
#1
Stripped Head Bolts HELICOIL TIME
My head gasket blew and when i tore into it i found 2 head bolts loose/with washers on them lol. So when i tore it down i found the holes were stripped, bought a helicoil kit, However my question is when retapping the bolt holes,., Would you use/have you used 2 inserts or just a single 1 that is slightly below surface of the head?
#2
Registered User
I wouldn't trust a helicoil for a headbolt. Your talking alot of ft-lb for it to hold. Have a machine shop fix it. They will most likely fill it and retap for the original headbolt. Or they will use a threaded insert which should not be confused with a helicoil.
#4
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No... don't use helicoil for aluminum heads, they expand too much when they heat up, I'd also go the threaded insert route, helicoil actually sells a threaded insert kit, its pretty easy to do, especially with the head off the motor.
#5
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Excuse Me but if the threads are stripped all my engines have the threads in the block!!! For Head bolts
Is this something new??
Have I missed something?? I am Always willing to learn.
I think Helicoil has become a term for any thread replacement.
I also don`t think that 65 to 70 foot pounds is a lot of torque
To have a machine shop repair a stripped hole could get more expensive then getting another block used to build.
Is this something new??
Have I missed something?? I am Always willing to learn.
I think Helicoil has become a term for any thread replacement.
I also don`t think that 65 to 70 foot pounds is a lot of torque
To have a machine shop repair a stripped hole could get more expensive then getting another block used to build.
#6
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My $.02..... If you dont spend the $ to do it right the 1st time, it will b more expensive in the long run.... I cant see a machine shop charging all that much to fill a hole and re-tap it.... then again...I rarely need anything done by a machine shop so.....
#7
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I have done this on 3406 Cat engine Blocks which are just a little bit more expensive.
I was wondering just how others on here have filled holes.
How much larger then the head bolt size was removed prior to machining a piece to replace it?
How much clearance??
Was Liquid Nitrogen used to shrink the new piece to install in block
Just curious!!
I was wondering just how others on here have filled holes.
How much larger then the head bolt size was removed prior to machining a piece to replace it?
How much clearance??
Was Liquid Nitrogen used to shrink the new piece to install in block
Just curious!!
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