crooked rows
Member
I'm getting ready to send the head from my 1655 diesel to the machine shop. I have copied the service bulletin on the valves that John Schwiebert put in the July 2010 Hart Parr Oliver magazine. what else do I need to tell him ?
- Thread starter crooked rows
- Start date
crooked rows
Member
Kris Morse said he would do it.
Dieseltech
Well-known Member
- Location
- Akron, Indiana
I'd measure the piston valve relief depth, on my 4-78 diesel forklift pistons had a .140 inch deep area for valve relief. If I recall John said to get the head seats so the valves would be .040-.045 above the head deck. After seeing what my pistons look like I had my seat fellow place all valves .080-.090 above the head. Even with the pistons at TDC, and a .050 inch head gasket valves still have plenty if exhaust/intake overlap clearance. My opinion, but the piston design like mine has is DUMB! Make the piston flat top, with a bowl, and valves would work just fine flush. Anytime piston tops have deep valve reliefs it kills the air swirling action for better combustion.
Adam Suess
Member
The reliefs in the direct injection engine pistons made by Reliance are made too deep so is the combustion bowl area. You start out with low compression. The pistons made by Arrow are by far the best in that regard. A friend of mine took the time to CC them out. Off hand I forget the difference but it was allot. But Reliance is what many places sell. I forget what the 1650's used for head bolts but on the 310T's I switched to using a flange head ferry bolt when I started to notice deformation around the bolt holes in the heads and warping of the washers. My 1855 was so bad we machine the top of the bolt holes flat. The 310T's use a 5/8 GR 8 bolt with a small head 7/8 wrench size. The ferry bolts had a higher tinsel strength and a much bigger surface for the washer.
Similar threads
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.
Copyright © 1997-2024 Yesterday's Tractor Co.
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.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy