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Joined: Sep 2012
Posts: 300
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Sep 2012
Posts: 300 |
The pal nuts on the rod bolts seem like they could come off ....I replaced the old ones with new ones and I realize they just need to be snugged down, but they just seem like some could end up in the oil pan. Do you all put them on after adjusting the rod bearings? I torqued the nuts to 43 lbs. Put new bolts and nuts on as the old ones were in poor shape. Thanks for your thoughts ........
David Martin-Hendersonville NC, Pine Island Fl....... 1940 Chevy SDSS,
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Joined: Apr 2002
Posts: 3,008 Likes: 1
ChatMaster - 3,000
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ChatMaster - 3,000
Joined: Apr 2002
Posts: 3,008 Likes: 1 |
I have never heard of useing "Pal Nuts" on rod bolts. I have always used castellated or slotted nuts with cotter pins. What year engine are you working on?
See you Touring the Back Roads
Joined VCCA June 1, 1961
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Joined: Sep 2012
Posts: 300
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Sep 2012
Posts: 300 |
Back Roads ....I`m working on my 1940 ....all the rod bolts have the pal nuts.
David Martin-Hendersonville NC, Pine Island Fl....... 1940 Chevy SDSS,
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The pal nut is actually a jamb nut. The little fingers tighten into the threads of the main nut....this jambs the threads and prevents them from loosening. In 1954 Chevrolet quit using pal nuts and the regular nut didn't look any different - ie - not a locking nut.
I have never seen a properly tightened pal nut fall on or a later nut loosen.
Gene Schneider
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The cotter pined bolts were last used in 1939. After that time if you bought a new rod for an earlier model it came with pal nuts. With the pal nut the bolt can be tightened to the desired torque with ot going a little tighter or looser so the cotter pin cam slip into the hole.
Gene Schneider
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