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Can a 53 Jubilee flywheel be installed 180 degrees off?

K

Kafer65

New User
The reason I ask is because I see the timing marks but last cylinder (closest to the driver #4 cylinder I believe) is the one that seems to indicate that it is at TDC with the rocker lash being loose rather than the the #1 cylinder as expected.
 
My understanding is that the cylinder #1 is at the front and #4 is at the back by the driver. Both #1 and #4 are all the way up. The one that is at TDC should have the valves closed and the lash should open on both intake and exhaust valves at TDC.
 
#4 cylinder is 180 out of what #1 cylinder is so you have it turned 180 off. I have never seen a flywheel tht could be on wrong since most have some sort of off set to the mounting
 
(quoted from post at 17:20:05 08/30/22) #4 cylinder is 180 out of what #1 cylinder is so you have it turned 180 off. I have never seen a flywheel tht could be on wrong since most have some sort of off set to the mounting
Click to expand...
????? :roll:
 
(quoted from post at 17:06:13 08/30/22) The reason I ask is because I see the timing marks but last cylinder (closest to the driver #4 cylinder I believe) is the one that seems to indicate that it is at TDC with the rocker lash being loose rather than the the #1 cylinder as expected.
Click to expand...

Firing order on these old fords is 1243. The front cylinder is number one, next one back is 2 then 3 then last is 4

When number 1 cylinder is exactly on TDC of compression stroke, cylinder number 4 valves will both be closed, though shouldnt be loose, because they are on the [b:568463016c]"rock"[/b:568463016c] That is, they will rock back and forth. In other words when rotating the engine slightly in one direction, one of the valves on cylinder 4 will just begin to open. When rotating the engine slightly in the other direction, the other valve on cylinder 4 will just begin to open.
 
(quoted from post at 15:06:13 08/30/22) The reason I ask is because I see the timing marks but last cylinder (closest to the driver #4 cylinder I believe) is the one that seems to indicate that it is at TDC with the rocker lash being loose rather than the the #1 cylinder as expected.
Click to expand...

I don't know about the 53 but both of my 8n's have two sets of timing marks on the flywheel.
 
Does the Jubilee flywheel have timing marks like the 8N? Two sets of timing marks 180 degrees apart. If it does then you can actually time the engine by using the #4 spark plug wire or as recomended the #1 spark plug wire. All things perfect the angle will appear the same for both.

That is to say: Use the #1 spark plug wire and #1 cylinder TDC and use the #4 spark plug wire and #4 cylinder TDC. This will NOT work if there is only one set of timing marks.

This post was edited by Btzj02 on 08/30/2022 at 07:09 pm.
 
#1 and #4 are same set of timing marks. Remember camshaft and distributor turn 1/2 crankshaft speed. #1 and #4 are both TDC at the same time, one compression, the other on rock. One revolution of the crankshaft other is compression, other is on the rock.
180 on the distributor is 360 on the crankshaft and the flywheel is mounted to the crankshaft.

If you have two sets of timing marks like the side mount distributor 8N there will be one timing mark for #1 and #4, and the other (180) timing mark for #2 and #3. So in that case you can time off any cylinder you want, or even all at once. Put timing light pickup on coil wire and time all four at the same time:) Makes it easier to see anyway:)
 
(quoted from post at 07:17:41 08/31/22) #1 and #4 are same set of timing marks. Remember camshaft and distributor turn 1/2 crankshaft speed. #1 and #4 are both TDC at the same time, one compression, the other on rock. One revolution of the crankshaft other is compression, other is on the rock.
180 on the distributor is 360 on the crankshaft and the flywheel is mounted to the crankshaft.

deleted

This post was edited by Mad Farmer on 08/31/2022 at 07:46 am.
Click to expand...
 
The flywheel on a NAA goes on the crankshaft in one position, and one position only, if you want all six bolts to screw into the crankshaft!
 
(quoted from post at 16:06:13 08/30/22) The reason I ask is because I see the timing marks but last cylinder (closest to the driver #4 cylinder I believe) is the one that seems to indicate that it is at TDC with the rocker lash being loose rather than the the #1 cylinder as expected.
Click to expand...

At tdc the #1 intake just closed and the #4 exhaust just closed . Both pistons would be at TDC at the same time .

I run my valves by making the companion valve down while I adjust the loose one . Starting from the front I set the second valve down and adjust the first , turn by hand until the first is down then adjust the second , turn until the fourth is down and adjust the third , etc moving down the line , adjust 1 , 2, 3, 4 , etc . If it is a v8 i start on one bank and move to the back the start with the other . You can do a v8 by the book and only rotate in once but it aint hard to skip one that way .
 
(quoted from post at 07:17:41 08/31/22) #1 and #4 are same set of timing marks. Remember camshaft and distributor turn 1/2 crankshaft speed. #1 and #4 are both TDC at the same time, one compression, the other on rock. One revolution of the crankshaft other is compression, other is on the rock.
180 on the distributor is 360 on the crankshaft and the flywheel is mounted to the crankshaft.

If you have two sets of timing marks like the side mount distributor 8N there will be one timing mark for #1 and #4, and the other (180) timing mark for #2 and #3. So in that case you can time off any cylinder you want, or even all at once. Put timing light pickup on coil wire and time all four at the same time:) Makes it easier to see anyway:)
Click to expand...

Great and more accurate information. Thanks!
 
(quoted from post at 20:56:06 08/31/22) The flywheel on a NAA goes on the crankshaft in one position, and one position only, if you want all six bolts to screw into the crankshaft!
Click to expand...
hanks WayneIA......13 responses and one answer. Typical though. Some people just like to jaw.
 
Thanks for your quick and accurate responses! It's been a long protracted fight bringing the old beast back to life, but it lives
again! I had two bad coil and a lot of cleaning to get the grounds to work (the condensor / points were not getting grounded).
 
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