Con rod bolts - ARP won't fit ---- Solved

[Rob_Reilly]

Now I’m sorry I ever mentioned it.
To use these ARP bolts, it looks to me like you will have to put a champfer or radius on the holes in the top side of the rods, and bore them out a little bit.
Any fastener nut system that doesn’t loosen up or break is a good system. Cotterless nuts replaced slotted nuts because they are faster to install, and on the production line time is money.
Replacing old bolts and nuts, if you don’t trust them for various reasons, with ultra high strength bolts, that you trust for various reasons, your extra money buys you peace of mind.
For my peace of mind, I trust Heynes, Bailey, and my own inspection, measurements and engineering calculations.
We’ve had this argument a few times before.

[xk] piston rods and cotter keys

Wise, experienced List, I pulled the sump on my 3.8 150 yesterday and to my dismay found bits of cotter keys in the sump. One nut on the #1’s bearing cap had no trace of the pin. I recall a recent discussion regarding cotter key failures and alternative nut problems (Not the human kind). My rather crude search of the archives did not lead me to the thread. Noteing the distinct relief at the nut’s base, I am hopeing to find something readly available. I trust others have found a suitab…

Rod bolt torque

I bought these bolts, and nuts from SNG. They are labeled as OE for a 140 , but they can’t be as they are non split pin. They have a sort of chamfer under the head which will need cleaning up. What sort of torque is suggested for this type? Thanks Jim [IMG_20190420_162731]