(800) 853-2651
SHOP NOW

4-276T john deere engine

A

Anonymous-0

Well-known Member
Cooling system on this engine contaminated with engine oil. Removed cylinder head, could not see any head gasket issues around rear oil pressure galley that supplies rocker arm shaft. Tested engine oil cooler OK. Looked for possible crack in block around oil pressure hole OK. There is a small amount of coolant in engine oil. My machine shop guy said he saw a couple of bad blocks with the same engine series that I have a few years back. Thought on getting short block from deere , machining the head crossing are fingers, any thoughts?
 
Odds are somebody did not check the corrosion inhibitor strength of the coolant. Which contributes to cavitation etching pin holes through the wet sleeves.
Usually however the coolant flows into the crankcase but.................
 
B&D is on the right track. I have seen them push oil/fuel into the cooling system but little coolant in the oil due to a pinhole in a liner. It has to do with the location of the hole in relation to piston travel. I would pull the liners and see what you find. If you're lucky the block will be ok yet. Your engine can likely be rebuilt. A good machine shop can help you.
 
Yes while the cavitation problems usually cause antifreeze to leak into the oil the oil can also syphon into the coolant.
 
You must log in or register to reply here.

Similar threads

B
450 antifreeze in oil
Replies
7
Views
622
used red MN
U
O
1946 John Deere B
Replies
14
Views
839
oldfarmall
O
G
Thermostat on an early 1954 John Deere Model 70
Replies
19
Views
943
Brownie450
B
K
1927 John Deere D - Resurrection from the Depths
Replies
7
Views
365
Mark-Ia
M
P
1955 Farmall 100 Engine Overhaul
2
Replies
38
Views
3K
BarnyardEngineering
BarnyardEngineering
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top