4W305 Engine Overhaul Parts
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=195556
Printed Date: 14 Aug 2025 at 9:27am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 4W305 Engine Overhaul Parts
Posted By: Amos
Subject: 4W305 Engine Overhaul Parts
Date Posted: 05 Jun 2023 at 11:17pm
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I read a while ago somewhere, that there was no longer a supplier for sleeves and piston kits for this engine, is that the situation?
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Replies:
Posted By: ryan(IN)
Date Posted: 06 Jun 2023 at 5:45am
At one time I thought Ivan Sumerix was getting pistons made. Don’t know if he still has anything or not.
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ryan
1984 8070 FWA,1979 7060,1975 7040,1971 190,1960 D-17D,1957 D-14, 196? D-19G, 1975 5040,1971? 160,1994 R62
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Posted By: 8070nc
Date Posted: 06 Jun 2023 at 10:38am
There was a post by amishdirect a while back about 25000 mark II heads and I talked to him. You might contact him he could give you insight
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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Posted By: 55allis
Date Posted: 06 Jun 2023 at 12:00pm
Wouldn’t it be the same as a 8550?
I think jensales might have an overhaul kit….
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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Posted By: AC7060IL
Date Posted: 06 Jun 2023 at 2:06pm
I noticed that JanSales kits(out-of-frame overhaul kit & piston kit) both state, “please call for availability.” On the other hand, some of that engine’s other kits state, “add to cart” like they’re readily available?
Here’s a link to it.
https://www.jensales.com/products/ep-915143-allis-buda-out-of-frame-overhaul-kit-allis-chalmers-6120t.html" rel="nofollow - https://www.jensales.com/products/ep-915143-allis-buda-out-of-frame-overhaul-kit-allis-chalmers-6120t.html
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Posted By: Amos
Date Posted: 11 Jun 2023 at 4:28pm
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Thanks. From looking at the price listed for the kit I am now confident it's getting a different engine, most likely an 11.1 liter detroit
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Posted By: 55allis
Date Posted: 11 Jun 2023 at 9:24pm
I never like “repowers” in rare tractors because it ruins the tractor…
Like the 855 Cummins repower in the 8550s, it ruined the looks.
It’s only my personal thoughts so don’t mind me, it your tractor…
I’ve always like the intake manifold that says Allis Chalmers…
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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Posted By: JPG AUSTRALIA
Date Posted: 12 Jun 2023 at 3:18am
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Try Phil hunt parts,tamworth australia,he has a lot of NOS parts.He was also getting liners made for certain engines.
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Posted By: 55allis
Date Posted: 12 Jun 2023 at 1:30pm
I guess I never asked, what is going on with the tractor?
Is it just burning some engine oil or is it something more serious?
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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Posted By: Ryan Renko
Date Posted: 12 Jun 2023 at 6:58pm
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I totally agree with 55allis. It's your tractor and you can do whatever you choose to do. If I was fortunate enough to own a rare tractor like this I would search every corner of the earth to find what I needed to keep it original. Just my 2 cents. Ryan
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Posted By: MikeKroupa
Date Posted: 12 Jun 2023 at 9:50pm
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You could also maybe find a good 6138T (844 ci) and use that for your repower engine, been done many times and still all AC. The pistons are the hardest part to find for the 6120T, sleeves are the same as the 6138. Good Luck, Mike
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Posted By: Amos
Date Posted: 16 Jun 2023 at 8:36pm
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Injector tip broke, piston pounded the pieces a bunch of times, have not pulled the an yet, but she had a massif knock going on idling into the barn. I need this tractor to work for me, engine has over 3000 hrs on it, just since coming to my place alone. and has been using more oil than in the past the last few years. i think any change I can make to make my equipment more reliable, more efficient and do better job is worth the effort. the rest of the tractor is in very good condition, newer tires as well
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Posted By: 8070nc
Date Posted: 16 Jun 2023 at 8:43pm
I know a guy that has some heads if you need one. Ill put you together if you want
Donald Matthews
910 824 8856
Leave a message if I dont answer
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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Posted By: Amos
Date Posted: 16 Jun 2023 at 9:20pm
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Thanks, I have one more engine to get out of my shop before I start into the 305.
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Posted By: Lynn Marshall
Date Posted: 18 Jun 2023 at 7:34am
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I have a 4W series service manual that I would sell, if interested.
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Posted By: 55allis
Date Posted: 18 Jun 2023 at 8:30pm
Heitmans tractor might be able to help, but it’s in Wisconsin so I don’t know how it would work crossing the border…. I can give you his phone number if you want it, just let me know.
From your description it’s a possible savable engine as long as it didn’t smash the block, my thoughts are “if it runs, it’s savable”.
I have a 45D that wasn’t timed right and the valves hit the pistons right after an overhaul but it didn’t ruin them and it still runs good after setting the timing right…
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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Posted By: Amos
Date Posted: 22 Jun 2023 at 6:38am
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I have done lots of business with Mark over the years
Thanks Lynn, I have a service manual for every tractor I own(ed)
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Posted By: ajl
Date Posted: 01 Jul 2023 at 11:19pm
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I also hope you can keep it Allis since it is a rare 305. I have run an 8550 when it rolled over the 10000 hr mark and it was running good at those hours. Granted I was pulling a 50' Degelman land roller at the time so it was not under heavy load.
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