Timing and Timing Gears
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Timing and Timing Gears
I am working on an engine rebuild. It's a 351W. One of the things I am changing is I am using timing gears instead of the stock timing chain. I have two questions about this:
First, if anyone has done this before on their engine, I'd like to know if you had troubles with the timing cover. When I put on the stock timing cover, it won't go on because there is a piece of metal in the middle of the cover that hits the gears in the middle (the driver gears) - http://imageshack.us/photo/my-images...blockblue.jpg/. If I was using a timing chain this piece of metal would fit in between the cam and crank sprocket. So I am not sure if I can just take off the metal that is in the way on the cover or if I need to get a new one. Anyone?
Second, this brings up the question of timing and what I should think of setting the truck to. I know what timing is but not sure if I should install the crank sprocket at TDB, BTDC, or ATDC. When installing the sprocket I can go at either ) degrees, +2 degrees or - 2 degrees. So I am really looking to learn what questions I should be asking myself so that I can determine what will be best.
Thanks.
First, if anyone has done this before on their engine, I'd like to know if you had troubles with the timing cover. When I put on the stock timing cover, it won't go on because there is a piece of metal in the middle of the cover that hits the gears in the middle (the driver gears) - http://imageshack.us/photo/my-images...blockblue.jpg/. If I was using a timing chain this piece of metal would fit in between the cam and crank sprocket. So I am not sure if I can just take off the metal that is in the way on the cover or if I need to get a new one. Anyone?
Second, this brings up the question of timing and what I should think of setting the truck to. I know what timing is but not sure if I should install the crank sprocket at TDB, BTDC, or ATDC. When installing the sprocket I can go at either ) degrees, +2 degrees or - 2 degrees. So I am really looking to learn what questions I should be asking myself so that I can determine what will be best.
Thanks.
Last edited by RIKIL; Jul 8, 2011 at 09:02 AM. Reason: 'cuz
Laughing Gas
Joined: Dec 2007
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From: Imperial, MO
Could you post up a pic of the inside of the timing cover so we can see what part is hitting the gears?
As far as cam timing goes, what cam are you running? Advancing the cam will usually increase low-rpm torque at the expense of high-rpm power and vice versa.
As far as cam timing goes, what cam are you running? Advancing the cam will usually increase low-rpm torque at the expense of high-rpm power and vice versa.
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As for the cam, it is a custom grind, here are the specs:
§ Intake Lobe DUR: 232/.565 lift
§ Exhaust Lobe DUR: 244/.560 lift
§ Lobe Sep.: 114
§ Advance: 4
Thanks
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Whoever designed your cam will tell you what it should be set to. You spent good money for a custom fit piece, follow their recommendations. It appears the cam is ground with 4 degrees advance built into it. I suspect you need to install it "straight up".
Laughing Gas
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From: Imperial, MO
It's pretty obvious that the OP (and the rest) are talking about the camshaft here.
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From: ohio
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Laughing Gas
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From: Imperial, MO
Look for the (small) red arrow:
Imageshack - unledeg.jpg
Imageshack - unledeg.jpg
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Thanks, I did take time to make sure it came out good. 3 coats of primer and the same for the color, per the instructions. I switched from the original Ford blue which was lighter.
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From: Jacksonville FL
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I took out that piece from the timing cover and it would work if I wanted to bolt it on but I think there should be a little more clearance so I am going to buy a new timing cover and see how that works.