Arp headstud free spinning

[Turbo Habanero]

So today I was finishing up a 7mgte head gasket job.

I used a tap to clean all the threads in the block and put in the head studs using a key nice and tight with the arp lube. Placed all the washers in place and continued to torque them down in order per tsrm.

Got them torqued to 75ft lbs with no problems. Continued to torque them to 90ft lbs and on the first one about half a turn into it I heard a crack and now the stud itself free spins. Starts to get tight but then loosens up.

I took the stud back out amd the threads on the stud and nut seem fine.

So did I strip the block?

Head also looks fine and not cracked.

 

[hvyman]

The studs are only supposed to be hand tight in the block.

sounds like block cracked. I would pull the head and verify.

 

[GrimJack]

Where did you use the lube, and what kind?

Also, how accurate is your wrench?

 

[IJ.]

The "J" Factor strikes again.... :nono:

 

[BoostMonger]

The "J" Factor strikes again.... :nono:

hahaha :nono:

 

[Turbo Habanero]

The studs are only supposed to be hand tight in the block.

sounds like block cracked. I would pull the head and verify.

Well they were as tight but not torqued I was only using a allan key.

I'm pulling the head this coming afternoon.

 

[Turbo Habanero]

Where did you use the lube, and what kind?

Also, how accurate is your wrench?

It's a Craftsmen Torque wrench relatively new.

I used the supplied ARP Lube and applied it to the threads that go into the block like ARP says to do.

 

[Turbo Habanero]

The "J" Factor strikes again.... :nono:

hahaha :nono:

Thanks guys... Figured I didn't do anything wrong or different then any other time I've done this. But shit happens I know I'm a curse.

 

[BoostMonger]

I thought I was cursed when a task takes 3 times longer than it should, dont take this the wrong way but you make me feel better.

 

[Turbo Habanero]

I thought I was cursed when a task takes 3 times longer than it should, dont take this the wrong way but you make me feel better.

I always take my time and triple check shit even if I'm sure. It really sucks if this block is trashed.

 

[Turbo Habanero]

Well it's not cracked I tried to re tap it and put the head back on but can't even go past 20ft lbs

 

[gsxr141]

throw a helicoil in there

 

[IndigoMKII]

the more you try, the worse it'll get. you pulled the threads out basically. was there metal shards on the stud when you pulled it out? did you torque the stud to the block using an allen head socket or torque the nut on the stud?

 

[atmperformance]

It's a Craftsmen Torque wrench relatively new.

Well there's your first mistake, china torque wrench internals.

I used the supplied ARP Lube and applied it to the threads that go into the block like ARP says to do.

I find no need to lube the stud that goes into the block I only use it on the top of the stud where you're torquing on the nut.

you should also be torquing at 30/60/90 I'm not sure how you followed directions and torqued to 75.

 

[GrimJack]

Well there's your first mistake, china torque wrench internals.

I find no need to lube the stud that goes into the block I only use it on the top of the stud where you're torquing on the nut.

you should also be torquing at 30/60/90 I'm not sure how you followed directions and torqued to 75.

QFT. Lube goes on the threads on the top, and between the nut and the washer.

Otherwise, with no lube on there, 90 ft/lbs is going to be... well, a *LOT* more than 90, anyway.

 

[Turbo Habanero]

Oh I see. Well I heli coil the block tomorrow and see if I can save it.

 

[Turbo Habanero]

Thanks guys

 

[7M4EVR]

Dont mean to be a dick but the surface of that block looks a little sketchy man. I assume this is just an oem hg job?

 

[Nick M]

Why ARP studs with the deck like that? An OEM or Fel Pro composite with factory bolts at 75 would be just fine. I realize you already bought the studs.

 

[Turbo Habanero]

Yes it's just a oem gasket and headstuds really are not that much more expensive. Surface is surprisingly smooth. I'll prob take some acid tone to it after I heli coil the block.