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Discussion Topic:
crankshaft gear removal
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MrHenderson |
10-30-2024 @ 2:31 PM
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Member
Posts: 19
Joined: Jul 2024
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The text image is from the Ford Chassis Repair Manual for '32 -'36. I'd like to see what comments come from reading those instructions. My engine is set as shown in the gear picture -arguably correct, but not according to the text. Now it's just a challenge for me. Is it the notch, or is it the nick? I feel bad that I brought it up. I'm Brad, thanks for thinking about it.
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MrHenderson |
10-29-2024 @ 2:07 PM
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Posts: 19
Joined: Jul 2024
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Wow, I'm the new guy here, and I didn't intend to stir anything up. That said, I was hoping the edited picture with the color dots would be right. But that sets the distributor drive slot vertical @ TDC and although it's been a few days now, I don't think my distributor was ready to spark. Plus my old Ford book describes marking TDC on the flywheel, and that the intake valve is some state of open. So you back the engine until intake is closed, turn forward until it starts to open. At that point the flywheel should be "approx" three teeth before TDC. Mine was 4 1/2 teeth, so I started looking. After every ones help I decided I would try to get the camshaft position correct and forget about various marks on the cam gear. The mesh now is like the picture of the seized motor would be at TDC. I'll be on the lookout for slippage and I have lots of pictures to compare. I wasn't able to upload the instructions I mentioned. May try again soon.
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TomO |
10-29-2024 @ 11:43 AM
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Senior
Posts: 7274
Joined: Oct 2009
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40 Coupe's photo is showing a different manufacturer's gear, so the timing marks are different styles. The red marks that I added to your photo are correct. I agree with 37ragtopman that the gear probably moved, with the clear markings, only the most careless person would press the gear on that far off. Because you are going to have to remove the camshaft to install another gear, ( you should not try to reuse the cam gear. Even if it was installed wrong, you have a much higher chance of it slipping.) I would go with replacing the camshaft with one that accommodates the metal bolt on gear. The pressed on gears have been known to slip and change the timing. Ford went with the bolt on gear in 1940. The fiber gears are quieter, but prone to having teeth break off. Third Generation has NOS Ford stock camshafts or you can go with a performance camshaft that will give yo a rolling idle. https://thirdgenauto.com/product/nos-1932-41-ford-camshaft-for-bolt-on-timing-gear/
Tom
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40 Coupe |
10-29-2024 @ 6:20 AM
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Senior
Posts: 1696
Joined: Oct 2009
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Below is a photo of a timing gear on an engine that is siezed so I can not align the cam gear timing mark with the crank gear timing mark. but the photo shows the location of the cam face timing mark and how it is aligned with the cam gear.
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40 Coupe |
10-29-2024 @ 6:01 AM
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Senior
Posts: 1696
Joined: Oct 2009
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Toms photo of the green mark on the cam face is not a timing mark. As I have mentioned previously the red line you drew on the cam face is the cam timing mark (small scratch). I agree with all the other red and green marks.
This message was edited by 40 Coupe on 10-29-24 @ 6:05 AM
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37RAGTOPMAN |
10-27-2024 @ 3:47 PM
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Senior
Posts: 1971
Joined: Oct 2009
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hi i think that the cam gear might have moved,, it might have spun on the cam, they do come loose, you will never get it to run correctly I would to repaice the camshaft with a BOLT on cam gear [ it will be worth it in the LONG RUN,] also replace the crank gear, I removed this using a gear puller, you can also drill by the key way, be carefull to catch the filing, [MAGNET] hit with a chisel and split the crank gear, it will fall off, when installing a new crank gear, heat it up on a stove, besure to use plyers to hold the HOT GEAR, My 2 cents 37Ragtopman,Maine
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carcrazy |
10-27-2024 @ 2:38 PM
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Posts: 1699
Joined: Oct 2009
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What is the elevation at the location where you measured manifold vacuum? I once bought a car in Boise and thought something was wrong with cam timing until I found out that the altitude there is 4,000 ft. above sea level. The 17 inches of Hg measured was right on the money for that condition.
This message was edited by carcrazy on 10-27-24 @ 7:17 PM
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MrHenderson |
10-27-2024 @ 12:11 PM
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Member
Posts: 19
Joined: Jul 2024
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TomO, I wish I could edit the pictures like that. That makes it crystal clear because I was already concerned (sure) that the engine shop incorrectly pressed the gear on the camshaft. (In 1977) I can make that correction in an afternoon, But I don't have an afternoon this week. I will report back though because the adjustment from first picture to second picture made a lot of difference in the start and run. Now I just need Henrietta to idle like she used to. But one more thing. The slot in the cam with your red dot is more aligned with a tooth than a valley. I think that means I can't get it perfect. Should I put the crank tooth with a dot, one valley before or one after the aligned tooth. I hope that makes sense. Thank you all for you comments and great editing. Brad
This message was edited by MrHenderson on 10-27-24 @ 12:22 PM
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TomO |
10-27-2024 @ 11:14 AM
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Senior
Posts: 7274
Joined: Oct 2009
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This should make it more clear. The red marks align the cam gear with the camshaft and the green marks align the camshaft with the crank gear. Tom
This message was edited by TomO on 10-27-24 @ 11:20 AM
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kirkstad |
10-27-2024 @ 10:45 AM
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New Member
Posts: 193
Joined: Jul 2017
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I believe that "carcrazy" is correct!
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