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In an attempt to check timing due to a overheating problem. Can not find the timing mark with a timing light. The mark is painted white but does not show up when hit with the timing light. The car is a 68' camaro with a 468ci and 350 auto trans, the engine starts first time.
What am I missing?
Any help would be great
 

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Use a piston stop tool to find top dead center. Then check timing.

Make sure to use the bypass hose on a 454. The short hose the goes between the intake and water pump.

If you don't use the bypass hose it will over heat. Unless you use a reducer instead of a T-stat.
 

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camaro tom said:
In an attempt to check timing due to a overheating problem. Can not find the timing mark with a timing light. The mark is painted white but does not show up when hit with the timing light. The car is a 68' camaro with a 468ci and 350 auto trans, the engine starts first time.
What am I missing?
Any help would be great
How do you know if that white painted mark is a "favorite" timing position, TDC, etc? The dampener has a groove machined into it, that will be your reference point for timing and TDC.
 

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camaro tom said:
In an attempt to check timing due to a overheating problem. Can not find the timing mark with a timing light. The mark is painted white but does not show up when hit with the timing light. The car is a 68' camaro with a 468ci and 350 auto trans, the engine starts first time.
What am I missing?
Any help would be great
Be sure you are timing it off of the #1 (or #6) plug wire. Be sure the idle speed isn't so high that the mechanical advance is coming in, causing the line to disappear from being over advanced. Check this by simply lowering the idle speed if it's high.

And you need to disconnect the vacuum advance if you are using one. Plug the line going to the carb or intake. If the engine idles too low w/the vacuum advance disconnected, temporarily raise the idle speed using the curb idle adjustment screw on the driver side of the carb.

Here is info on the HEI and setting it up w/a performance timing curve, etc.
 
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