Pete, what you post is correct and I have no issues with. IH co. indicated that leaded gasoline DID increase plug and valve deposits. Valve lash is important. Once again, Octane and timing play the role here. Another factor I forgot to mention on burnt valves, is running a tractor too lean on the carb mixture. I would have to do some research as to the octane ratings of "white gas".
Heads without Stellite seats would wear faster on the valve seat, and that coupled with valve stem wear would change the lift on the valves. There is more to valve lash and lift than just how much fuel gets into the combustion chamber. I also agree that modern gasoline doesn't give us much choice in octane ratings.
Previous poster indicated that valve jobs were the norm on high milage engines in the "old" days, and this was due to lead build up. Later, lead purging agents were added to the gas to burn off the lead deposits. These agents were also referred to as lead scavengers.
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 - Show Coverage: Fair Weather Tractor - by Dave M.. No, Fair Weather isn't some rare brand. It's the kind you can't leave out in the rain. Here's how it happened. I had been casually looking for a tractor for weeks. I saw a few 9N's, but they had even fewer amenities than the 8N my Grandpa bought new in '52 with a Dearborn loader. That was 10 years before I was born, so I grew up thinking that 8N was the world's best tractor. Grandpa had greenhouses, with over half an acre under glass, and that 8N did almost everything. It was the only
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
