ALLIS 175 VALVES

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   i think this head and rocker shaft and push rods, and also engine block #'s has to go to a DIFFERANT   machine shop that really cares and will look up the parts and spec.s and do some measureing for you.     would probley be a minamaul cost .  they will pick up on whats wrong 

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HudCo Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 29 Jan 2013 Location: Plymouth Utah Points: 3828	Post Options Post Reply Quote HudCo Report Post Thanks(0) Quote Reply Posted: 14 Dec 2016 at 10:32am
	i think this head and rocker shaft and push rods, and also engine block #'s has to go to a DIFFERANT machine shop that really cares and will look up the parts and spec.s and do some measureing for you. would probley be a minamaul cost . they will pick up on whats wrong

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Allis dave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 May 2012 Location: Northern IN Points: 3006	Post Options Post Reply Quote Allis dave Report Post Thanks(0) Quote Reply Posted: 14 Dec 2016 at 10:34am
	The D17 block uses 3 7/16's head studs instead of 3/8's. When mine was off this summer, the those 3 bores in the WD45 head would be large enough for a 7/16 stud. I don't think there was a change there. I think the only change was in the size of the manifold studs. I believe the tall head is 4" and the short head is 3". You should be able to measure that pretty easily. The valve cover was also taller on the short head to make room for the taller rocker pedestal. I would bet that if you put a 1" block under the rocker pedestal, you can't put on the valve cover.

SteveM C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8530	Post Options Post Reply Quote SteveM C/IL Report Post Thanks(0) Quote Reply Posted: 14 Dec 2016 at 8:46pm
	The 4in head isn't quite 4in but along way from 3in.He has stated the head as being the "4"in.Thats why I ask him how stem/retainer height compared to the head I measured.I still haven't had that question answered.Hard to help someone who won't cooperate. My 4 inch head measured just short of 3 7/8 with a tape measure so his head is NOT too thin.... Edited by SteveM C/IL - 14 Dec 2016 at 8:49pm

THEFOX Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 02 Sep 2016 Location: DULUTH MN Points: 31	Post Options Post Reply Quote THEFOX Report Post Thanks(0) Quote Reply Posted: 16 Dec 2016 at 6:18am
	The head we have is 3 7/8" thick. The tractor ran before being torn down and the neighbor is second owner of the tractor, first owner says head was never off so how does the head we have, have the wrong casting number on it if it was the same head he took in? Too darn cold now to do any work on it so it'll have to wait a while.

Allis dave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 May 2012 Location: Northern IN Points: 3006	Post Options Post Reply Quote Allis dave Report Post Thanks(0) Quote Reply Posted: 16 Dec 2016 at 7:55am
	How do you know what the casting number is "supposed" to be. Check if the manifold studs are 3/8's. If so it IS a WD45 head. Even if it is a D17 head, it doesn't matter and wouldn't cause your problem. WD45 and D17 heads are interchangeable and the same height. Did you get the spring seats or caps on wrong? A picture of the assembled head would help a lot. I'm guess the valves or seats are wrong. If your head is 3 7/8's, that is not the problem. Edited by Allis dave - 16 Dec 2016 at 7:57am

SteveM C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8530	Post Options Post Reply Quote SteveM C/IL Report Post Thanks(0) Quote Reply Posted: 16 Dec 2016 at 9:07am
	...and a D17 & up used long reach plugs.A WD45 plug will not reach the chamber...either way both heads should bolt on.They use the same rocker stands so if things don't fit you have to have wrong valves (too long).If that's the case who knows what springs are on it.PM your# & I'll send a phone picture of my head so you can see how things appear. Edited by SteveM C/IL - 16 Dec 2016 at 9:20am