D14 Head Bolts

I had head rebuilt on D14.  Was cleaning up head bolts and saw some were beat up a bit.  Was going to buy new ones but AGCO is too proud of them.   Was thinking of just using Grade 8 bolts off the shelf if I can get lengths right.   Some books called for 80 ft lb torque but seems like 60 to 65 is enough on a 7/16 -14.   I don't think Allis would have set them up for that much stretch.   My D14 service book did not really have a torque call out that I could find.  

Not just AGCO gouging, even the beat up used ones are $20-$40 per bolt.  I saw one "kit" for the D14 that was priced at $451.  I'm sure you can find a good grade 8 bolt set of the right lengths.

If "generic" Grade 8 bolts are good enough for DrAllis to be OK with for a 149 then that makes me a little less sceptical of using them on my 125-liner'd 116 motor if the seller doesn't manage to send on the originals.

I'm getting confused I think, being in the UK I was thinking of *class* 8.8 as we're subjected to metric standards... You're probably correct *grade* 8 (class 10.9 being the metric equiv.) would all have a shank.

im not saying you cant find something "different", or that everybody follows the SAE  Standard... but there is a sheet..

For clarification Caterpillar hardware is not the same as generic. But the world is always changing, and I have had "Made in China" on parts out of a Caterpillar parts box. For 50 years Cat bolts were as good as you could get. But they are not head bolts, and I don't know what that difference is. But since other with real life experience are Ok with it I would use them.

yeah thanks.   What torque do you use on these motors?   The Grade 8 black bolts from Fastenal matched the factory bolts pretty close for body diameter.   Threads are plenty long, in fact the original bolts appear to be cut down from standard lengths.  Wrench flats are smaller.  Lengths go every half inch in these sizes so I also got hardened washers to correct grip length.  When I do two washers on the short bolts and one on the long bolts they line right up.  Block tap depth seemed marginal even with stock bolts so I will try to run a tap down to make sure.   May need a bottoming tap.

Redi-bolt to me is always 36 inches long, not 5 1/2 inches long.

There have been times over the years I could have utilized a grade 8 quality all-thread/redi-bolt because I couldn't find a regular gr 8 bolt long enough. Thanks.

Doc, 

DrAllis wrote: I have never found a Grade 8 redi-bolt anywhere. If there is a such a thing, I don't know where to source it.