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What's the gap on those plugs?I used these ac Delco iridium factory plugs. Says they are supposed to be good for 100k. But looking at my picture apparently there were at least 2 different sets of plugs. I'll have to look tomorrow I haven't thrown them away yet.
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Where did you get the plug gap size of .060?. I know the plugs I'm running were originally .040 and gapping iridium plugs can be a problem.
When was last time you noticed reservoir was full? My nnbs, within 15k of new, i noticed i was low in reservoir and filled it thinking factory never filled it up...10-15k later, low again....never anything on the ground, nothing in oil, no over heating.... nothing....started looking and sure as shit right on frame rail behind rad was coolant. It was a tiny leak and happened to land right on the frame, evaporate and never hit the ground. Since you’re going in anyway, after you’re done replacing and flushing make a note when res is full and keep eye on it if it goes low again start looking. You may fix it and never know however, if you do hoses, flush and fill... etc.
I need to change my diff fluid. I have no idea if it has ever been changed at all. Also my truck is flex fuel and I didn't check the gap cause my parts guy said they were already gapped.
Dont care if they say dont gap plugs or they are pre-gapped.... i check on everything my cars, harleys, minibikes, lawnmowers....etc my 2c
