I haven't checked the valve specs for a gasoline engine, but I thought they were the same as the diesel which are .015" Intake and .018" for the exhaust. I can see the exhaust being a bit more on the gasoline engine, but certainly no more than 21.
I'd guess that if you're getting a lower spec with the correct clearance, then mabey your adjustment procedure is off somewhat. I don't check the marks on the diesels. I just watch the valves and get it near TDC by feel. You could pull the plugs and use a welding rod to determine when you're at TDC for adjustment purposes.
Another thought is that if you had slack valves, you may have rockers that are oddly worn or cupped. The consequence is that you can run your 1/2" wide feeler gauge measures the FLAT spots on your rocker and valve stem while the actual clearance is measured on the worn cupped part... which is sometimes substantially more. If I wanted to check that I'd set up a dial indicator on the rocker head over the valve and measure the actual clearance when you work the rocker back and forth. If you find it excessive you could run the rockers down to spec... but you really should have them reground flat. Just a thought.... Dunno what to tell you beyond that.
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 - Fire in the Field A hay fire is no laughing matter-well, maybe one was! And a good life-lesson, too. Following World War II many farm boys returned home both older and wiser. One such man was my employer the summer I was sixteen. He was a farmer by birth and a farmer by choice, and like many returning soldiers, he was our silent hero: without medals or decorations, but with a certain ability to survive. It was on his farm that I learned to use the combination hand clutch and brake on a John D
... [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.
