Timing notch
Moderators: rickf, raymond, Mr. Recovery
Timing notch
Hello everyone….my first technical question.
I’m checking timing on my 68 A1 and my dampener has two distinct notches. All my manuals only refer to one notch. Any help would be appreciated.
Thanks.
I’m checking timing on my 68 A1 and my dampener has two distinct notches. All my manuals only refer to one notch. Any help would be appreciated.
Thanks.
Re: Timing notch
There should only be one notch. Any possibility you can post a pic of what you are looking at? If you get a real close closeup that is great but then also get one from about top of engine distance for perspective.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: Timing notch
![Image](https://i.postimg.cc/vTwYC4R4/IMG-1830.jpg)
Here’s the best pic I could get. I did check further and have found that the lower mark is definitely the 6 degree btdc. I pulled the plug and verified.
Last edited by mccoop72 on November 24th, 2023, 10:02 pm, edited 1 time in total.
Re: Timing notch
I agree, that upper notch appears to have been put there with a chisel. If I had to guess I would bet that is on TDC.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: Timing notch
I put a dab of white paint/ florescent paint on the notch to help see it better, used a wire brush on it to define the the notch better.
mark
1968 m274A5
1960 m151
1981 m151A2
1964 m416
1971 m416
1968 m274A5
1960 m151
1981 m151A2
1964 m416
1971 m416
Re: Timing notch
Thanks for the help guys.
Re: Timing notch
A little update. Couldn't time the distributor as I kept running out of travel. So, I pulled the distributor and barred engine to around TDC.....looks like the oil pump is 180 out.......**ck. Well looks like I'm pulling my power pack. At least its cold and snowy out and not good for driving!
You do not have the required permissions to view the files attached to this post.
Re: Timing notch
I was thinking of the wrong notch-the one on the vibration dampener
Last edited by Mark on November 26th, 2023, 5:59 pm, edited 1 time in total.
mark
1968 m274A5
1960 m151
1981 m151A2
1964 m416
1971 m416
1968 m274A5
1960 m151
1981 m151A2
1964 m416
1971 m416
Re: Timing notch
Did you have number 1 plug out to verify you were on compression on number 1?
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: Timing notch
Yeah, I verified compression on no.1
Re: Timing notch
Later model dampers had 2 notches. One for 6 degrees. One for 30 degrees. Ignition timing is all laid out in TM 9-2320-218-20-1-1. Chapter 4-17.
Pages 4-72 and 4-73 specifically explaining why the 2 notches. I ran across this recently working on a friends A2. I too had not seen this before.
The notches on the A2 were on front and top.
Pages 4-72 and 4-73 specifically explaining why the 2 notches. I ran across this recently working on a friends A2. I too had not seen this before.
The notches on the A2 were on front and top.
MSG, USAR (Ret) 31Jan99
MOS- 63T5H
M151A1- Ford
M416-1967 CEMSCO
MOS- 63T5H
M151A1- Ford
M416-1967 CEMSCO
- svramselaar
- Major
- Posts: 1111
- Joined: December 30th, 2007, 6:48 am
- Location: holland
Re: Timing notch
hi
to take the engine out is a lot of work
if you take the ignition cover off rotor arm off
at the center of the axle is a wick take it out
now you see a spring ring or a screw take it off
get the ground plate or module out
now you can take the notch from the axle
turn it a half and put the ignition back together
now sits the rotor arm a half turn a round george
to take the engine out is a lot of work
if you take the ignition cover off rotor arm off
at the center of the axle is a wick take it out
now you see a spring ring or a screw take it off
get the ground plate or module out
now you can take the notch from the axle
turn it a half and put the ignition back together
now sits the rotor arm a half turn a round george
You do not have the required permissions to view the files attached to this post.
Re: Timing notch
If you do what George says be SURE to mark the distributor somehow to indicate what was done in case you rebuild the engine and then when you put the pump in right and you reinstall the distributor you will be pulling your hair out!!! I have several distributors here that were modified by turning and repinning the dog on the bottom of the shaft. This was done in the military since these were bought out of DRMO.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: Timing notch
Thanks for the replies everyone. I had planned on pulling this engine sometime in the next year anyway. I was curious so I pulled the timing cover to double check static timing and it was right on. I attatched another pic of that oil pump position.
I went through that manual that was mentioned previously but I didn’t see where it explained the two notches. Unless that’s the end of the timing advance travel?
Thanks
Coop
You do not have the required permissions to view the files attached to this post.
Re: Timing notch
I just read that section and I do not see anything at all about two notches? It simply states to raise rpm and make sure the timing mark advance smoothly away from the pointer and then slowly back as the engine comes back to idle. Nothing at all about two marks. I can clearly see the one mark on his pulley is machined in and the other was put there with a chisel.1SGCAV77 wrote: ↑November 27th, 2023, 7:53 amLater model dampers had 2 notches. One for 6 degrees. One for 30 degrees. Ignition timing is all laid out in TM 9-2320-218-20-1-1. Chapter 4-17.
Pages 4-72 and 4-73 specifically explaining why the 2 notches. I ran across this recently working on a friends A2. I too had not seen this before.
The notches on the A2 were on front and top.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone