Posted by Eric Bergstrom on July 26, 2009 at 22:15:51 from (98.240.239.156):
I spent most of this weekend trying to figure out the reason my W-4, which has an identical engine to an H Farmall, (in case anyone didn't know already) keeps losing compression when it's hot. It will run PERFECTLY when first started and operated, but then as it warms up, it will eventually begin to miss and die. Even if you shut if off before it gets hot enough to act up, it will spin over way too fast (for what a normal 6 volt system would do) and not start without a pull.
Anyway, I started by replacing my valve springs, as they seemed quite weak (although the new ones from Case IH didn't seem all that much stiffer).
Then, I tested the compression and it ranged anywhere from 45 psi to 75 psi per cylinder. I then compared that to my H, which works perfectly, I found that it has 110 psi across the board.
This obviously raises red flags. However, I'm uncertain how to know if it's my rings or my valves causing the problem.
The engine does not smoke at all. It also runs perfectly at high or low RPM when it's not too hot. I would have thought that bad rings would cause smoking and bad valves would have caused a rough idle. I could hear air escaping in some of the cylinders when I had them under pressure to replace the valve springs.
Also, it has a mag, which seems to put out good spark. Sorry for the long novel of a post, but I'm stumped and I don't want to fix one "problem" only to find out it was being caused by something else.
Any input would be greatly appreciated and thank you for your time!
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: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[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.
