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Chevy Blazer
Chevy Corvette

On a 1977 Chevy Blazer 350 engine installing a new HEI distributor the engine at top dead center is the number 1 plug wire the 1st plug clockwise of the electrical connections on the distributor cap?


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January 18, 2008 5:10PM

It depends on how you put the distributor in. If you're asking this question now it probably means that you didn't have the engine at TDC when you took out the old distributor and put in the new one... now you get to track down TDC on the engine (that's when #1 cylinder is at the top of the compression stroke) and find out where the distributor is pointing.

Understand that the #1 piston will be at TDC on top of the compression stroke and on top of the exhaust stroke. You need to make sure it's the right TDC. At that point, wherever the distributor is pointing is #1. Unfortunately, not everyone makes sure the distributor is back to factory specs.