Correct Gap for Spark Plugs
I have been reading on a couple of RV sites and there are 3 different answers. I 'm installing new plugs & wires on a Vortec 8.1 engine. My book says they should be gaped as per engine specs. I can...
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Personally, I gap a shade small. My Suburban 5.3 calls for max of .60. I gapped at about .50. That way as it wears in it will stay around the sweet spot longer. When I changed them out they were way worn out, like .80+. As you can imagine my torque has greatly improved. The only symptom it displayed before was wanting to down shift climbing hills in OD. Now it doesn't need to (not towing). The GM V8s are really forgiving.
As a side not I bought it used and so, had no idea how long the plugs had been in there. I bought iridium plugs on Rockauto.com along with all new plug wires. Runs perfect..
As a side not I bought it used and so, had no idea how long the plugs had been in there. I bought iridium plugs on Rockauto.com along with all new plug wires. Runs perfect..
