Mine are 3/4 inch nuts...are those correct ? Is there a special wrench ?
Also, is there a tork setting ? how tight is tight and how loose is loose , relatively speaking ?
I use Snap-on (use the drop down for sizes)
http://buy1.snapon.com/catalog/tools.asp?tool=&Group_ID=674912&store=snapon-stor e
As for torque, it depends on who you ask. Some like 50 ft/lb, others like 55
50-55 is for head bolts.
Mains should be Torqued to 80 foot pounds, and then pull for the key.
Yes there is a special wrench, not that you need it if you have a torque wrench. The handle is about 12.5 to 13 inches long. With a good pull it will be about 80 foot pound. What I was shown is if the slots don't come even close, take the nut off and file a little off the face or swap nuts around. Never back the nut up to get the slots lined up, loosen it back up and try again. I like to bring it up to about 75 and see how it looks the go for 80 if its close.
The Castle nuts on my 3rd main are 3/4 socket size. Is this normal? The 1st and second mains are 9/16 square, yes ? .
Remember I am doing this through the inspection plate .....what a pain it is .
There was a dozen companies making Main Bolt Wrenches. Most have a 3/4: socket on one end and all have a square socket on the other end EXCEPT the wrenches made for the main bolts from 1912 back. The end of the early bolts was a strange head that is hard to describe. I will try to send a picture of the early main bolts and the wrench later.
By the way if you don't have an original main bolt wrench with the square head you can use a 6 point modern 5/8" inch socket and breaker bar on the later main bolts.
Another way to go is they at least use to make modern style socket sets with socket with square insides. I don't know if they are still making them.
You might need to go to a "real" tool company to find them these days, but a 9/16" 8-point socket is what fits those front two main bearing bolts. Sears used to carry 8-point sockets, but I don't think they do any more.
BTW, Yes, the nuts are 3/4" on all of them.
Don Knoll:
If you use ALL METAL SELF LOCKING NUTS you will save your self a lot of time and you will not have to line up any cotter pins.
The original type would be a wrench very similar to this, but with the number 2149 and a 3/4" socket where mine has a 5/8" socket.
The original type would be a wrench very similar to this, but with the number 2149 and a 3/4" socket where mine has a 5/8" socket.
Thanks all ! Dan