Fact of the matter is. A roller lifter cannot "turn" unless the tie bar holding the adjacent lifters in proper orientation breaks or comes off. In order for that tie bar to come off the spring steel retainer or spider must come unbolted or one of the arms has to break off...
Since a sbc lifter has an oil groove all of the way around it there is no way for it to block oil to the bearings by rotating in the bore. The lifter galley is the first place to get oil in a sbc (yes even before the mains and rods). The oil passes through the lifter galley and is then distributed to the mains which then supplies the rods. Oil feeding the lifters is sent to the top end via the push rods. Thus as long as the pickup is taking in oil and the pump is putting it out and it's going through the filter the lifters will get oiled first. There are screw in plugs behind the flywheel flexplate in the block and press in plugs behind the timing chain with small holes in them. If one comes out it'll lose oil pressure. If you roll an engine over by hand a half dozen times you will begin to collapse hydraulic lifters.
If you wipe a camshaft lobe the fine particulates will wipe out the main and rod bearings and oil pressure will drop. Hence whenever an engine eats a camshaft or lifter you pretty much have to totally disassemble it, thoroughly clean all parts and oil passages and rebuild with new bearings. and in some cases have rods resized and the crank turned...
I've seen sbc roller camshafts eat themselves a few times. Easiest way to tell is to pop the intake, and remove the lifters that aren't opening the valve... you'll know right away if you have a bad lobe. I've also seen lifters that won't pump up...
A few years ago I had a customer bring a brand new Hi-perf marine engine to me that ate a roller camshaft... GM or Mercruiser had installed BBC roller lifters in the mouse which have flats 90 degrees to a sbc roller lifter... hence the roller was sliding over the lobe instead of rolling... engine lasted a total of about an hour before it died...
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 - Good As New - by Bill Goodwin. In the summer of 1995, my father, Russ Goodwin, and I acquired the 1945 Farmall B that my grandfather used as an overseer on a farm in Waynesboro, Georgia. After my grandfather’s death in 1955, J.P. Rollins, son of the landowner, used the tractor. In the winter 1985, while in his possession the engine block cracked and was unrepairable. He had told my father
... [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]
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.
