flames101sully

iTrader: (1)

I bought 6 of DENSO 4701 Iridium TT spark plugs due to postive reviews online (Crossing fingers these plugs are not awful). The gap for these are .040 and these cars say to gap at .044. I have heard you shouldn't gap iridium plugs, so will the current gap be good enough?

Here is the link to them https://www.amazon.com/Denso-IK16TT-.../dp/B00TPU8OT0

maxiiiboy

I would not bother.
My reasoning goes like this: Your gap of 0.040" is 0.1mm shorter then the recommended gap of 0.044" (1.01mm vs. 1.11mm). About 10%. We can't fully predict the impact of this slightly shorter gap, but I would reason that it might be equivalent to advancing the timing by a very small amount. (I assume that other parameters, e.g. spark size, are not significantly affected). All in all, not an issue and perhaps an advantage, IMHO.

Derrick2k2SE

iTrader: (3)

Great plugs. you can't go wrong with them.
I wouldn't worry about gaping them at all. The iridiums will fire a nice hot spark with that gap. The gap opens as they wear anyway so I'd rather start a little under than over. The ones coming out will probably be over .55.

Les7311

I would not use them but instead "do it right the first time". Spend the extra so you don't have to regret something later. eBay is my best friend and I will find genuine OEM part there, to include the plugs I replaced on my '11 only two weeks back, and some I ordered yesterday for my tundra.

SubwayVQ

What?

mclasser

Les7311

Oh my. Here goes.

I would not gap the plugs. Better yet, just buy the specific plugs for your car, OEM PREFERRED. I have read on other forums where they used a recommended plug, then later had engine / gas mileage problems.

Spend the extra buck and get the OEM.

Hope this is better for a response.

SubwayVQ

Based on what Derrick has said, I don't think it's a concern. He knows his stuff and said that's a great plug. The car calls for Iridium so I think it's fine.

Les7311

Kewl beans.....

Derrick2k2SE

iTrader: (3)

Denso or NGK are the only plugs I'd ever put in the car.

I've not heard of anyone having problems with these plugs. Most of the problems are because people went cheap and put old school copper plugs in the car.

flames101sully

iTrader: (1)

Thanks guys, will check them to make sure they are all the same gap, but will not gap to 0.044. After I install them I'll let you know how it runs.

flames101sully

iTrader: (1)

New question. So I delayed changing plugs to get a little more out of the old ones. When I checked the gap for the new ones, they are all at 0.036. Now being 0.08 off of OEM spec, is this cause for worry?