From your post it sounds like this is the first time the engine was started after overhaul. Therefore, the problem occurred at the first shut down after a short running check out. Some cooling systems, especially if the thermostat seals tight can trap air until the thermostat opens and water actually flows. As a result the cylinder head is not filled with water and can have hot spots. In this case the problem should go away once the system is actually filled. To this end, I like to drill a small vent hole in the thermostat flange (some have them) to bypass water preventing this problem.
I am not an AC expert and do not know what compression results with a 45 crank and 175 pistons. You will need to use gasoline with an octane rating to account for any significant increase in compression. Also, if the bore was increased you should run a head gasket which accounts for that. If the gasket extends into the cylinder it can run hot resulting in problems.
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. [ About Us ]
Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
... [Read Article]
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.