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Are these stock rod bolts on my 401? |
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JolleyGreenSST
AMC Apprentice Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
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Posted: Nov/08/2018 at 3:23am |
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I was working on my 401 and noticed the rods are 12 point nuts and I seen a a youtube video of another AMC engine being torn down and it had standard 6 point nuts on the rod bolts... So I was wondering if these were stock or anything speciale (they have F A stamped on the head also) and another question if anyone can confirm these are the factory forged rods by looking at them, I'd appreciate it.
Thanks. |
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"God is good all the time and all the time God is good!"
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5368 |
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Yes.....factory original on 390 and 401. 290/304/343/360 had 6 point fasteners (nuts)
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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jpnjim
AMC Addicted Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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^ agree
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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PROSTOCKTOM
Supporter of TheAMCForum Joined: Jun/20/2010 Location: Indiana Status: Offline Points: 2427 |
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Sorry to bust your bubble, but they are stock rods, bolts, and nuts. Here's a photo of a stock 401 I bought last year that came out of a 63,000 mile International pickup and you can see it too has those 12-pt. nuts. Tom |
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tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4068 |
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All 390 and 401 engines had forged crank and rods from the factory. Those are factory rods. Bob tufcj
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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JolleyGreenSST
AMC Apprentice Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
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Thanks for the picture confirmation! 🖒 |
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"God is good all the time and all the time God is good!"
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JolleyGreenSST
AMC Apprentice Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
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Thank you everyone for the replies I was aware already that all the 390 and 4 ones were Factory forged rods and crank, but because this engine has been rebuilt at least once if not more in the past I was wondering if anyone might have changed parts. But thank you all for confirming that it is original equipment. On a side note does anyone know if goes bolts are reusable or if it's recommended that I replaced them? |
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"God is good all the time and all the time God is good!"
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tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4068 |
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50 year old bolts that have already been through at least one rebuild. Put in ARP bolts and have the big ends resized. Cheap insurance, and a small fraction of the cost of a rebuild. Bob tufcj
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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PROSTOCKTOM
Supporter of TheAMCForum Joined: Jun/20/2010 Location: Indiana Status: Offline Points: 2427 |
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Just installing a set of ARP bolts and having them resized will now cost you over $200. I can sell you brand new Molnar rods for $575 a set shipped. Little bit of a price difference, but if your going to spend money on 50 year old stock rods you might as well just put that money toward a new set.
Tom
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JolleyGreenSST
AMC Apprentice Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
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I don't think I'm going to build it to a crazy high power level... probably going to keep it close to stock, I have a performer intake and maybe a small cam with the stock hi flow manifolds... I need to save some funds for the suspension and interior. If I could afford to go full out I would but I have a tight budget for this kinda stuff. |
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