Discussion Forum - Northstar Chevelle Club

Members Login
    Remember Me  
Post Info TOPIC: Allis Chalmers WD


Status: Offline
Posts: 159
Allis Chalmers WD

Thought I would just start a new thread to document my fun adventures of owning a 70 year old tractor. I drained the oil the other day and stuck my finger in the pan and could feel some sludge. I decided to drop the pan and found a couple cups of heavy sludge in the pan. The inside of the block though was actually pretty clean. I took off the valve cover and found quite a bit of build up there however. I scrapped and vacuumed most of it around the springs, but it is just a tedious task. The tractor has been run with non-detergent oil it's whole life. My father-in-law has sworn that it needs that and continues to need that. My understanding though is that if you were to run a detergent oil with all that sludge in place, it could clog up oil galleries and cause more problems. Well with all the sludge gone, that shouldn't be a problem right? I would like to run a traditional 10w30 from now on. Anyone have any thoughts on running some seafoam or other similar products with the oil to clean anything I missed? There is an oil filter on the tractor as well. I'm also thinking I should take off the oil pickup and clean that up as best I can. That screen had to of been sitting in the sludge and trying to suck all that up. This whole project is slowly snowballing, but I also want this thing to be reliable for another 70 years!  


1965 Elky, 350-200R4

1970 Mercury Colony Park 

1952 Allis Chalmers WD

"It's not about how fast you go, it's about how fast you get going"

~ Steven ~ Stacy, MN


Status: Offline
Posts: 7294

I wouldn't start using a detergent oil now. Your f-i-l is right, that the engine was never designed to run on detergent oil. IF you decide to go to detergent, use a 30 weight oil, not a multi weight. I believe it would get too thin once hot for the lose tolerances that it was built to.
Yep, clean the oil pickup screen too, while you are in there.
As for sea foam, if you run it, be prepared to change the oil and filter after a couple run periods to get it, and any crap it has loosened, out.
Be careful cleaning an engine that old with loose tolerances and wear. If you get it too clean, it may start burning oil and smoking.


Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

Some Assembly Required

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20

Page 1 of 1  sorted by
Quick Reply

Please log in to post quick replies.

Please log in to join the chat!