D-262 head bolt kit from ARP
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=210617
Printed Date: 04 Apr 2026 at 7:34am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D-262 head bolt kit from ARP
Posted By: DrAllis
Subject: D-262 head bolt kit from ARP
Date 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. |
Replies:
Posted By: VaAllis1990
Date Posted: 02 Apr 2026 at 8:03pm
| I bought mine through Mark Pfouts, he kept them in stock I think |
Posted By: 55allis
Date Posted: 02 Apr 2026 at 8:56pm
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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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Posted By: 55allis
Date Posted: 02 Apr 2026 at 9:00pm
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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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Posted By: DrAllis
Date Posted: 02 Apr 2026 at 9:12pm
| Thank you !!! That's what we needed !! |
Posted By: HudCo
Date Posted: 03 Apr 2026 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 |
Posted By: JC-WI
Date Posted: 04 Apr 2026 at 2:11am
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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...   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?  ------------- 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." |