Sparklpug gap?

**wanna69** · 07-12-2008, 09:21 PM

When doing a tune up, what should the sparkplug gap be?

**ct9a** · 07-12-2008, 10:44 PM

I think it differs depending on what motor/year/etc. Look under the hood, if the emissions sticker is still there, it should say what the gap is (I think).

**zippy** · 07-13-2008, 12:27 AM

Originally Posted by wanna69

When doing a tune up, what should the sparkplug gap be?

Spark plug gap is application specific; however, if you're in this forum, there's a good chance that 0.035-inch is the gap for you.

Searching for more MPG, I changed to a hotter ignition and AC's Rapidfire Platinum plugs. They're pre-gaped at .045 (a longer spark) instead of the OE recommendation of .035-inch. Actually, I can't remember the last time I bought new plugs that weren't correctly gapped. Plug makers might even provide special packaging to protect the gap. Be advised, some plugs are plated and a ham-handed re-gapping can mess them up. These days, with unleaded gas, spark plugs have a phenomenal service life. By the time they need re-gapping you've probably already got your money's worth.