YB Long Stud and Head Bolt Torque Settings
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Redumbdancy
Joined: May 2004
Posts: 4,882
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From: Aberdeen / Glasgow
YB Long Stud and Head Bolt Torque Settings
Hi guys,
I'm looking to confirm the torque settings for a block / head with 6 long studs and 4 standard stretch bolts across the ends. I've seen two recommended settings as follows:
1. 30lb, then 60lb, then 90lb on all 10 studs / bolts.
2. Do 30lbs, 60lbs, then 90lbs on the long studs. For the four stretch bolts, torque up to 25nm (18lb), 45nm (33lb) and then 180 degrees. This is the recommended settings from Ford for the stretch bolts.
Option 1 seems better to me as all will be torqued to the same setting. However, I'm mindful that the torque settings for the stretch bolts in option 1 seem considerably higher than what Ford recommend for the stretch bolts. Is this a concern from point of view of potential over torquing causing bolt failure?
Cheers,
Rich
I'm looking to confirm the torque settings for a block / head with 6 long studs and 4 standard stretch bolts across the ends. I've seen two recommended settings as follows:
1. 30lb, then 60lb, then 90lb on all 10 studs / bolts.
2. Do 30lbs, 60lbs, then 90lbs on the long studs. For the four stretch bolts, torque up to 25nm (18lb), 45nm (33lb) and then 180 degrees. This is the recommended settings from Ford for the stretch bolts.
Option 1 seems better to me as all will be torqued to the same setting. However, I'm mindful that the torque settings for the stretch bolts in option 1 seem considerably higher than what Ford recommend for the stretch bolts. Is this a concern from point of view of potential over torquing causing bolt failure?
Cheers,
Rich
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From: izmir
Here are the guidelines from ARP courtesy of John Mummert. You may discover a portion of the data fascinating: Head stud and head jolt units are utilized to improve bracing of the head to the block, improving the clasping power diminishes the frequency of blown head gaskets. Early Y's were gathered with normal quality head jolts. These were updated late underway to Review 8 clasp (?????). This decreased the number of blown head gaskets however there is still an opportunity to get better. Our head screw and stud unit uses an ARP clasp which is a tremendous improvement over the creation of Y latches. These are 8740 amalgams with 190,000 psi elasticity. Either unit is an immediate supplanting without any mods vital. Early Y-blocks required longer darts at the finishes of the upper line of jolts because of the recessed strings at the square dowels. In 1960 and later heads the 5 upper head jolts are generally a similar length (I didn't realize that!). 192.168.100.1 192.168.1.1
Last edited by hakils; Mar 8, 2021 at 06:39 AM.
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