Tractor Talk Discussion Board |
Re: '95 GMC 6.5TD engine
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by jdemaris on September 07, 2006 at 12:10:57 from (69.67.230.145):
In Reply to: Re: '95 GMC 6.5TD engine posted by Bob on September 07, 2006 at 08:44:25:
The high-nickel blocks show up now and then. Yes, the first 1982s had it. So did many later military-spec. engines. At one time, the blocks were color-coded and stamped to indicate high-nickel content. GM also did it with various high-performance gas engines. I've got a high-nickel block 327 from the late 60s and also had a Z-28 302 that had it. But, besides the alloy used, the casting thickness was reduced in 94. In regard to the block main-bearing webs breaking first and thus causing the crank to break? Could be - in some cases. But, I also know of few 6.2s and 6.5s that broke cranks and still ran - with all main-bearing supports still intact. One 6.2 I looked at broke behind the rear-main - so the flywheel was no longer attached. The guy that started and owns the 6.2-6.5 diesel Website says he believes such failures are due to worn harmonic balancers. I personally, don't believe it. I suspect the cranks are cast (not forged) and simply not durable enough to last forever - and sometimes much less. With bigger diesels, especially in road-tractors and farm tractors, we had many high-hour cranks welded and reground and I never saw one fail (break to pieces) like my 6.2 did. I did have an IH B-275 ag. diesel tractor that had all its main bearing webs crack.
Replies:
Home
| Forums
Today's Featured Article -
Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
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 HeadquartersWebsite Accessibility Policy |
|