Timing gear out of sorts?

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Model T Ford Forum: Forum 2015: Timing gear out of sorts?
Top of pagePrevious messageNext messageBottom of page Link to this message  By Tom Quigley on Friday, October 16, 2015 - 08:15 pm:

How does the car behave if the timing gear is installed incorrectly? Timed the car to TDC using lang's tool, changed carbs. Regardless, I have no power on long pulls. When timed, the commutator contacts the fan belt when advanced. Does not idle smoothly. No vacuum leaks

Pulled front engine plate, then the timing gear dot and crank gear mark meet, the #1 piston is not at TDC. Engine is new but built by others a long time ago.

Can it be that the timing gear is 180 out?


Top of pagePrevious messageNext messageBottom of page Link to this message  By bob middleton on Friday, October 16, 2015 - 08:19 pm:

Could be miss marked is it the fiber one or steel

There's a lot of fiber ones marked 1 tooth off


Top of pagePrevious messageNext messageBottom of page Link to this message  By Frank van Ekeren (Australia) on Friday, October 16, 2015 - 08:24 pm:

Might need to check compression before blaming anything, your question on marks, that's right, the #1 will not be ATDC and if the gear is fitted 180 that makes no difference either.
Best way to check valve timing is to have #1 at TDC and then the valves on #4 will be rocking on full open.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Georgetown TX on Friday, October 16, 2015 - 09:11 pm:

The piston is not at TDC when the marks align. That's normal. The marks align where they align.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Shirley on Friday, October 16, 2015 - 11:47 pm:

May 23 2012 Forum addresses your question. The cam turns once to every 2 revolutions of the of the crankshaft so every other 360 degree turn of the crank the cam is out 180 and the next full revolution it's correct.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Rod Barrett - Anderson, IN on Saturday, October 17, 2015 - 01:09 am:

Do you have a picture of the commutator contacting the fan belt? It would seem that there is something wrong with your timer and or rod and you are not getting enough advance on your timing. Have you set the fully retarded position to 15 degrees after top dead center? Have you checked the coils to see if they are set to 1.4 amps on a hand crank coil tester?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf, Parkerfield KS on Saturday, October 17, 2015 - 02:42 am:

The fan belt contacting the timer is more likely due to the position of the belt than the timer. The timer rotates in place, but the position of the belt changes due to its length or adjustment.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Roger Karlsson, southern Sweden on Saturday, October 17, 2015 - 03:47 am:

Lang's tool is a copy of an old Ford tool that was used for timing Ford timers. If you still have an original Ford timer it should work, but few have since they haven't been made for more than 70 years..
It's easy to time any timer by looking at the pin on the crank shaft that the hand crank engages - it's horisontal when the pistons are at top (and bottom). 15 degrees after TDC would be at a 3:30 - 9:30 position. First check so the #1 piston is at compression, then loosen the timing rod connection to the timer, position the crank pin at 15 degrees after TDC and turn on the ignition (spark plugs lying on the head, connected) Turn the timer so the ignition just starts and bend the timing rod so it fits to the position of the timer - with the lever fully up.

The lack of strength may be due to the camshaft - a bad regrind or just a worn out cam.


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