Re: Timing Question.

Posted by John/Ont on December 31, 2008 at 15:23:46 from (64.230.33.233):

In Reply to: Timing Question. posted by Guido on December 30, 2008 at 05:40:01:

at this point as you see it although incorrectly all you have mentioned is things which are able to change piston position. The root of timing in any internal combustion engine be it gasoline, propane, diesel , injector, injector pump or a Gnome Rotary are all termed in degrees of or around the crankshaft rotation .

Spark ignition timing, or fuel time-of-injection, or time of valve opening - expressed as degrees before, at, or after top-dead-center or bottom-dead-center. Center of what? The crankshaft position?
ACTUALLY YES the throw of the crank is supposed to be at the predetermined point before ign or injection . EACH AND EVERY THROW As i said before if they are in the improper place then the part is either damaged

EG.#1-- "The Deere flywheel timing mark lied about where #2 piston actually was = damage

EG#2 -- If a crank-throw is not where it is supposed to be = damaged and that throw is out of time

EG# -- the crank reference mark does NOT work for all cylinders if all is not perfect. All it takes is one bent connecting rod (that is now shorter than the rest)= damaged

Piston travel is not timed it is positioned according to crankshaft throw timing and can safely be assumed that TDC of a piston is Equal to TDC of the crankshaft throw.

Rods are measure in length and weight not degrees

The terms TDC, BTDC, ATDC, BDC, BBDC, ABDC actually refers to the crankshaft throw can be referenced from the manufacturers predetermined position most commonly beginning at #1 cyl and all things being as they are supposed to be each cylinder will fire at the same point (EG 10 deg.BTDC)
DAMAGED OR IMPROPERLY manufactured parts will adversly affect the functionand timing of that part and all those that follow it such as a bent push rod, that valve may be out of time but it is out of time to the crankshaft which put that piston in position .

By using your own quotes I have shown you the difference between close and being correct of which I AM CORRECT

As for my 30 years "Your 30 years do not prove, or disprove a thing." you are WRONG there as well.
They prove I actually have that education and experience. Maybe they don"t mean anything to you but with your attitude which is less than desirable you don"t want to learn you just think you are right

So far you have been unable to name me one part of an internal combustion engine that needs to be timed that does not relate back to a crankshaft

GNOME ENGINE TIMING
To "time" the engine, position the crankshaft with the crankpin at Top Dead Center (TDC) for the right hand cylinder. There will be a timing mark on the the gear of each cam/gear assembly. Position the right hand cam/gear so that the timing mark is closest to the crankshaft -- ie mark "down" in relation to the "up" crank pin. The other gear is set opposite -- ie mark "up" in relation to the "down" crankpin. Now put everything else back together and set the tappet clearence to 0.1mm (0.004") when the valve push rod is at its lowest point. Nothing else requires special attention, assuming you are familiar with engine assembly techniques.

NOTE THAT EVEN THE TIMING FOR THIS ENGINE REFERS BACK TO CRANKSHAFT

So Go ahead you can have the last word I will refrain from any further responses to your comments or this particular subject as you are unwilling to be any further educated

HAPPY NEW YEAR
to YOU and ALL OTHER FORUM PARTICIPANTS

Replies:

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video URL: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.   Advanced Posting Tools   Upload Photo  Select Gallery Photo  Attach Serial # List  Return to Post

TRACTOR PARTS	TRACTOR MANUALS

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 ]