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D-262 head bolt kit from ARP
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22821 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Topic: D-262 head bolt kit from ARP
    Posted: 02 Apr 2026 at 7:07pm
I know someone on here in the past had part numbers or information on an ARP brand head bolt stud/nut kit for the D-262 diesel engine used in D-17 and D-19 tractors. Could someone help with this old information ?? Thanks for your help.
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VaAllis1990 View Drop Down
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Joined: 26 Jan 2022
Location: Champlain Va
Points: 37 		Post Options Post Options   Thanks (0) Thanks(0)   Quote VaAllis1990 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2026 at 8:03pm
I bought mine through Mark Pfouts, he kept them in stock I think
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55allis View Drop Down
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Joined: 30 Jun 2020
Location: Griswold Iowa
Points: 1344 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 55allis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2026 at 8:56pm
I got mine right from ARP.
Think somewhere I have the part numbers…
1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors
     
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55allis View Drop Down
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Joined: 30 Jun 2020
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Points: 1344 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 55allis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2026 at 9:00pm
Qty                      Part number                  Description
16                        AR6.500-1LB               STUD ½ X6.5 LONG BROACHED
2                          AR7.000-1LB               STUD 1/2X7.0 LONG BROACHED
2                          AR8.000-1LB               STUD 1/2X8.0 LONG BROACHED
20                        ARN34                          1/2X20 HEX NUT HEAD MAIN
20                        ARW78N                      ½ ID 7/8 OD H&M WASHER



Found them!!
If I remember right I had to cut like a 1/2” off the top of the studs under the rocker.
1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors
     
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DrAllis View Drop Down
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Points: 22821 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2026 at 9:12pm
Thank you !!! That's what we needed !!
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Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 4078 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 19 hours 38 minutes ago at 8:48am
thats execatant i still have to order a set for my series one engine    my series1 origanal block had studs when it tokk it apart and the series 2 engine block that i am having counter bored had bolts when i took it apart    is that the way they came new 
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Joined: 11 Sep 2009
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Points: 34626 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JC-WI Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 15 minutes ago at 2:11am
Thank you for posting those part numbers so I can get a set to put in my old D17 262 engine.

While at it, Will somebody track down the place Mack had those annealed FIRE RINGS made for those old D17/D19 engines???  And get a another stack of them made and available again for those that still want to rebuild these engines.
Going to need them to put my old 17 Diesel head back on, and am planning on going with studs instead of bolts.  
mmm, Now with studs you have two sets of threads that may stretch...Ermm Confused
So which is really better? Studs or bolts? 
 I know there are people putting in studs into the ford diesel truck engines to prevent blown head gaskets, so studs must be the better way to go? Smile 
He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."
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