Hi all and thanks for your attention,
I am looking for new head bolts for a 430 MEL in a 1965 Chris Craft Supersport.
I attempted to reuse my old bolts but in trying to achieve 140 ftlbs I broke one and necked another bolt.
I got some supposed grade 8 bolts from Fastenal [41/2",9/16,12tpi]. After doing a little investigation about torque values wet vs dry I had concluded that 110 ftlbs wet approximates the 140 ftlbs specified. The Fastenal bolts stretched and one failed at 100 ftlbs as I worked my way up to the 110 I was planning.
The wet/dry torque idea is scary if you contemplate how inaccurate relying on estimations of friction in the field must be!!!
Anyone shed light on my torquing plan? Even better,anyone have a source/part number etc for replacement bolts?
I am looking carefully at the shorter of the two bolts used for an FE engine as a replacement bolt. Anyone know if this will work?
I have spoken to ARP technical support and they were nearly as useless as the parts counter folks who can only say "we have nothing in the computer for that application"
I have posted this same inquiry on the other MEL board with no response
Thanks again
I am looking for new head bolts for a 430 MEL in a 1965 Chris Craft Supersport.
I attempted to reuse my old bolts but in trying to achieve 140 ftlbs I broke one and necked another bolt.
I got some supposed grade 8 bolts from Fastenal [41/2",9/16,12tpi]. After doing a little investigation about torque values wet vs dry I had concluded that 110 ftlbs wet approximates the 140 ftlbs specified. The Fastenal bolts stretched and one failed at 100 ftlbs as I worked my way up to the 110 I was planning.
The wet/dry torque idea is scary if you contemplate how inaccurate relying on estimations of friction in the field must be!!!
Anyone shed light on my torquing plan? Even better,anyone have a source/part number etc for replacement bolts?
I am looking carefully at the shorter of the two bolts used for an FE engine as a replacement bolt. Anyone know if this will work?
I have spoken to ARP technical support and they were nearly as useless as the parts counter folks who can only say "we have nothing in the computer for that application"
I have posted this same inquiry on the other MEL board with no response
Thanks again
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