By noting the position of the timing mark on the damper vs. the position of the pushrod, you have documented a timing problem. Now you have to determine whether the damper ring has moved [and the relationship between the pistons and the valves is actually correct], or whether there is a problem in the timing chain.
To determine whether your timing mark on your damper is correct, Google "positive stop method" + "TDC"...this will determine exactly when your piston is at TDC, and whether or not there's an error in you damper timing marks. If there's an error, these guys can repair it:
http://www.damperdoctor.com/
Then with a correctly marked damper, check where your intake valve is in relation to TDC. If your cam still appears to be significantly retarded, tell your buddy that he needs to suck it up and replace the timing chain and gears.
Anytime you do an overhaul on a smallblock V8 and don't replace the timing chain and gears, you're doing a "half-fast" overhaul, and are at best postponing the day when the engine will let you down. Is the price of a chain and gears worth bent valves and pushrods, or perhaps sticking a valve through a piston top? Call it insurance, replace the easy stuff, and walk away KNOWING that those parts are good, rather than guessing.
P.S.: The poor vacuum readings are a sure clue that the valve timing is off, Sherlock.
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 - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
