Spark plug gaps

[j_cd]

For $3 I bought both of the round gap gauges. I use the coin style one to measure the gap, since it has gradations in hundredths. To do the gapping I use the round oem tool with the wires sticking out. It has a little groove for gapping the plug.

[nadz]

I'm running NGK Platnums and NGK plug wires, no problems at all.

I was going to get NGK wires but every one here says get the oem bougicord brand.

[nwhitney]

When you say "premium," do you mean Platinum? If so, don't use those (many have had problems with them), get some regular Bosch copper plugs (cheap...less than $2 each)...if the gap is at .02, you'll need to get a gap tool (cheap- usually $.99 at the counter) to spread it to .028 inches (not mm). If you have a tuned car or a turbo, I recommend down to .026. The gap you speak of, at .02 is the same as .020 which is .006~.008 too little. It could make a difference. Our Volvo's are very finicky when it comes to plug gaps.

I have a 2000 v70 turbo and the owners manual says to gap them at 0.30 and non-turbo at 0.28.