Question about 1991 Buick Riviera

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Spark plug location 1991 buick riviera

I need to clean or replace my spark plugs

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Can't clean spark plugs...and DO NOT buy Champion brand, use Autolite or Delco. Your plugs are accessible through the inner fenderwells...remove front wheels to get to them.
P.S. do yourself a favor and do this as well, or in advance of the plugs...go to Advance Auto and buy "SeaFoam" gas additive and follow directions...drive at least 100 miles.
Good Luck

Posted on Jun 15, 2009

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I hope help with this; remmeber to rate this.

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How to change the spark plugs


You need a special spark plug socket for your socket wrench.

Put a piece of tape on each spark plug wire, marking them so you can remember where to replace them. Mixing them up is pretty awful.

For me, it's difficult to pull off the spark plug wires. I do it with pliers, rocking slightly as I pull. Sometimes I need something like a hammer handle to pry against. So far in my life only one broken clip has resulted.

Then you unscrew the plugs. Access is not too bad on the 92 Riviera.

Gap the new plugs to .060 inch. (1/16 inch would be .0625) You need some sort of gauge to do that accurately. I think it's better to err on the small side, rather than wider.

Screw in the new plugs. Tighten quite tight. Clip on the wires again. And you are ready to go.



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