TTY head Bolts ,(Torque to yield) Question 350 mags

[Jetgod]

Commencing re attachment of heads on my 2000 5.7L 350 mag/mpi. Is there a substitute torgueing table I can use instead of this BS TTY method. Thought I had all the torque wrenches I needed but apparently NOT. lol Any help please?

 

[Dieseljeff]

Here is some good info on TTY bolts.

Not sure if you plan on using the same head bolts but IMHO, I would buy new ones.

http://www.enginebuildermag.com/2001/02/threaded-fasteners-torque-to-yield-and-torque-to-angle/

Also:

Tighten in stages and sequence to 40Nm
Tighten in sequence to 90degrees
Tighten in sequence a further 90 Degrees

Measuring rotation in degrees instead of an applied torque figure ensures that friction does not overcome the tightening process and that an even clamp load is easily achieved.

Not sure why you can't use a regular torque wrench though?

Ahhh..nvm..I see you might want the electronic torque wrench.

Another tool to add to the peg board:grin:

Jeff

 

[Jetgod]

Thanks for the feedback .I am pursuing deeper.

Here is some good info on TTY bolts.

Not sure if you plan on using the same head bolts but IMHO, I would buy new ones.

http://www.enginebuildermag.com/2001/02/threaded-fasteners-torque-to-yield-and-torque-to-angle/

Also:

Tighten in stages and sequence to 40Nm
Tighten in sequence to 90degrees
Tighten in sequence a further 90 Degrees

Measuring rotation in degrees instead of an applied torque figure ensures that friction does not overcome the tightening process and that an even clamp load is easily achieved.

Not sure why you can't use a regular torque wrench though?

Ahhh..nvm..I see you might want the electronic torque wrench.

Another tool to add to the peg board:grin:

Jeff

 

[cfd95]

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