D17 with flat top pistons

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   My WD45 puller I have been working on will not be ready for our local shows first pull of the year, wont have all the parts I need in time. It’s out of my hands. 
So I have a D17 I tore apart last year that pulled good but smoked and burned oil. Had 1/8 over SP48’s in it. They are badly worn and can not be run any longer. I have a set of 1/8 over WD flat tops I could use. 
Has anyone ran that set up? I can figure up my compression and what I need to mill off myself, I’m gonna go for around 10:1 comp. My question is would I still have to mill in valve reliefs? Or what Amount would need to be milled off in order for it not necessary to mill in valve reliefs? 
Thanks!! 

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
PA185 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 Mar 2019 Location: Pennsylvania Points: 67	Post Options Post Reply Quote PA185 Report Post Thanks(0) Quote Reply Topic: D17 with flat top pistons Posted: 24 Mar 2021 at 6:02am
	My WD45 puller I have been working on will not be ready for our local shows first pull of the year, wont have all the parts I need in time. It’s out of my hands. So I have a D17 I tore apart last year that pulled good but smoked and burned oil. Had 1/8 over SP48’s in it. They are badly worn and can not be run any longer. I have a set of 1/8 over WD flat tops I could use. Has anyone ran that set up? I can figure up my compression and what I need to mill off myself, I’m gonna go for around 10:1 comp. My question is would I still have to mill in valve reliefs? Or what Amount would need to be milled off in order for it not necessary to mill in valve reliefs? Thanks!!

Sponsored Links

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 20535	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 24 Mar 2021 at 9:11am
	Place the SP-48 alongside the flat top and shove a piston pin thru them to hold them together. If the height of the flat top isn't any greater than the SP-48, you won't have to do anything. It can even be some taller and if the cam grind/timing is OEM, you still won't have to do anything. Piston can be within probably .050" of the top of the sleeve and it will still miss the valves, but check to be sure.

PA185 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 Mar 2019 Location: Pennsylvania Points: 67	Post Options Post Reply Quote PA185 Report Post Thanks(0) Quote Reply Posted: 24 Mar 2021 at 9:19am
	Very simple but good way to check!! Thank you!! I will see what I can come up with