Pulling Forum - Head Bolts

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Head Bolts

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=185150
Printed Date: 23 Nov 2024 at 6:45am
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Topic: Head Bolts

Posted By: dgerth
Subject: Head Bolts
Date Posted: 15 Dec 2021 at 8:55am

Building a new engine. Getting close to head bolt time and was wondering, I have a set of

ARP's but they will be too short now. Anyone know of alternatives for longer bolts other than ARP ($$$$$) studs? Or should I quit being cheapo and bite it!!

Replies:

Posted By: bsallis180
Date Posted: 15 Dec 2021 at 10:48am

What motor? what fuel? how is it aspirated?

Posted By: dgerth
Date Posted: 15 Dec 2021 at 2:15pm

Carburetor, 149 cid, 13.1 to 1 CR, 112 race fuel (VP)

Posted By: bsallis180
Date Posted: 15 Dec 2021 at 2:55pm

I would imagine OEM be fine. If you want bolts I use CAT grade 8 bolts on high Hp turbo diesel like greater then 800hp. The flat surface area would be more important then a aftermarket stud/bolt in your application my opinion

Posted By: DMiller
Date Posted: 15 Dec 2021 at 4:32pm

You need to go to Studs and Nuts, Forget Bolts. Went thru stuff like this on IH Pullers in the 80s

Posted By: DrAllis
Date Posted: 15 Dec 2021 at 7:16pm

I've built probably two dozen Allis G-226 and W-226's in the last 40 years and never used anything but a good grade 8 bolt and a hard flat washer under the head. All were carburated and no turbo's. All were over 10 to 1 compression and the 400 inch ones at 13 to 1. Never have had any troubles, so you'll never convince me to use studs and nuts which are so hard to clean up around when you do work on the engine. The later D-17 engines were always grade 8 from the factory, but most people don't know that.

Posted By: PaulB
Date Posted: 16 Dec 2021 at 3:32pm

I feel NEW grade 8 bolts with hardened flat washers will be just fine. That what I've used on all the small Hi-Performance AC engines I've ever built. Even the one in the D10 with the turbocharger. If you want to go for studs, go for it. Either way don't use used bolts/studs.

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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY

Posted By: NEVER green
Date Posted: 18 Dec 2021 at 9:10am

Go to pulloff dot com, there is a discussion there and are several companies listed supposedly reasonably priced.

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2-8050 1-7080 6080 D-19 modelE & A 7040 R50