It could be a stuck or broken intake valve (or a weak/broken intake valve spring) allowing air to blow back through the intake path on the compression stroke. I'm thinking this may interfere enough with the air/fuel flow to the other cylinders to keep the engine from running at all.
When you say the valves are moving, do you mean the actual valves or just the rocker arms? Do all the valve stems follow the rocker arms all the way up when the rocker arms rise?
I would second El Toro's assertion that a compression check will tell you a lot at this point. A compression check with good results would be pretty strong evidence that the valve train is working properly.
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 - Two-Brush Generators - by Chris Pratt. Whether for product liability or because the aftermarket parts and labor business is lucrative, this concept is disturbingly prevalent. Fortunately when you step into your shop and make that jump 50 years back in time to work with your old tractor, this concept goes out the window. Even so, when it comes to the charging system, people quickly revert to this idea and start replacing the major components one at a time until it works. The reason you don't find any decals in your replacement set wit
... [Read Article]
Latest Ad:
WANTED IH C200 gas engine — complete running motor Wanted complete used IH C200 gas engine in running condition for an International 574 gas tractor. My block has a hole in it and is dead, so a rebuild kit wont do it — need a whole running motor. The C200 also came in the 544 and 674 gas trac
[More Ads]
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.
