Farm Equipment - D17 Gas

Print Page | Close Window

D17 Gas

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=10674
Printed Date: 23 Jan 2025 at 12:58am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D17 Gas

Posted By: BobHnwO
Subject: D17 Gas
Date Posted: 06 Apr 2010 at 5:37am

What is max.compression pressure on a D17 gas engine with new rings?

Replies:

Posted By: BillinValpo
Date Posted: 06 Apr 2010 at 6:00am

Don't know on a rebuild but new the book says 150.

Posted By: DrAllis
Date Posted: 06 Apr 2010 at 7:36am

AC D17 4 inch bore OEM compression should be 145 psi. Any aftermarket 4 1/8" bore kit will probably be less than this (been my experience anyway). AC "170" or "175" compression would be around 170 psi.

Posted By: BobHnwO
Date Posted: 06 Apr 2010 at 8:33am

Thanks Guys!!

Posted By: george b es md
Date Posted: 06 Apr 2010 at 8:55pm

My '59 4-1/8" bore flat top pistons been pulling 2 years

188-192#