When installing timing chain and cam in 350 chevy - Team Camaro Tech
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  #1  
Old May 28th, 11, 08:23 AM
1320King 1320King is offline
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Default When installing timing chain and cam in 350 chevy

When installing a cam and then aligning the timing chain marks in a 350 chevy does the #1 piston need to be at TDC when this is being done?
Or does that only matter when you are stabbing the distributor in.
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  #2  
Old May 28th, 11, 08:27 AM
DT DT is offline
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Default Re: When installing timing chain and cam in 350 chevy

Yes. #1 TDC
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Old May 28th, 11, 08:31 AM
BPOS BPOS is offline
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Default Re: When installing timing chain and cam in 350 chevy

Yes. #1 and #6 will be at TDC. When you align the gears "dot to dot" as in the picture, be aware that #6 will be at TDC on the compression stroke and #1 will be at TDC on the exhaust stroke. Install distributor accordingly.

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Old May 28th, 11, 09:40 AM
1320King 1320King is offline
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Default Re: When installing timing chain and cam in 350 chevy

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Originally Posted by BPOS View Post
Yes. #1 and #6 will be at TDC. When you align the gears "dot to dot" as in the picture, be aware that #6 will be at TDC on the compression stroke and #1 will be at TDC on the exhaust stroke. Install distributor accordingly.

So the distributor rotor would actually be pointed at #8 piston then if the timing chain is installed as shown or 180 degrees out?
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Old May 28th, 11, 10:15 AM
DT DT is offline
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Default Re: When installing timing chain and cam in 350 chevy

No, rotor should face the #1 piston.
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Old May 28th, 11, 11:19 AM
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Default Re: When installing timing chain and cam in 350 chevy

All you need to worry about is getting the two dots to align.
There's a dowel pin on the cam and the crank has a keyway.
If the dots are lined up you can't screw it up.

Then get your #1 piston on TDC compression stroke(your timing mark on the crank should be close to zero). Drop the distributor in and the rotor should be pointing slightly before the #1 position (it rotates clockwise).
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Old May 28th, 11, 11:28 AM
TJS69 TJS69 is offline
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Smile Re: When installing timing chain and cam in 350 chevy

sprocket marks dot to dot as shown will be # 6 firing !

both marks at 12 o'clock will be #1 firing !

You want to drop in the distributor to match the above.

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Old May 28th, 11, 12:20 PM
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Default

I always use about 10 degrees before TDC ( advanced) by the timing mark because you are going to have to advance the disti from zero to get it to run well anyway.
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Old May 28th, 11, 01:16 PM
john68 john68 is offline
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Default Re: When installing timing chain and cam in 350 chevy

Quote:
Originally Posted by DT View Post
No, rotor should face the #1 piston.

If you line the gears up dot to dot, set the dist to #6, the service manual explaines in detail???
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Old May 28th, 11, 01:35 PM
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Default Re: When installing timing chain and cam in 350 chevy

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Originally Posted by john68 View Post
If you line the gears up dot to dot, set the dist to #6, the service manual explaines in detail???
Yes, I was thinking 12 o'clock position. (explains)
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