ychachad

I want to change the plugs on my 95 LS. After 126k miles, I have no record of any previous change. The 95 manual states that the plugs are platinum, gapped at 0.031" or 0.8 mm. I know my 92 LS gap is 0.044" or 1.1mm. The engine is the same, why the difference? I have read posts where people claim the same confusion, and that a service manual also states 0.044" contradicting the owner's manual. The listing for the plugs in the 92 and 95 manuals for both cars is also for different types. The Bosch and NGK websites also state a gap of 0.044". So what is the real gap? Has anyone changed the plugs in their 2nd gen LS? What gap did you use? Most importantly, what will happen if I install plugs with a gap of 0.044" instead of 0.031". Please help. Thanks in advance.

bicol-ini

hi, used .044 gap on my 96 used bosch platinum and i just checked its gap, didnt have too cause bosch comes pre gapped

RA40

iTrader: (6)

Same here, took them right from the box and put them in.

If I reacll right (please correct me if I'm off here.) platinum plugs require less arcing voltage so some variance in tolerances are negligible to a certain point. Best I could gap a plug with consistency was to .002" with a plier type gapping tool. My cars haven't demonstrated an obvious loss with that difference. Maybe on the track or dyno this may show up, in my every day, it's negligible.

ychachad

Thanks chaps, I got the Bosch Platinum plugs 4202. I'll replace them as soon as the snows die down. 0.044" it is, straight from the box. Cheers!!!

ychachad

I performed the change of plugs. The passenger side bank was a PITA with the tight intake box that had to be slid off. What a change, the original plugs were absolutely filthy on the inside (but thankfully dry) the outside ceramic had browned, and the metal was a little rusty. The plugs I had on the car did have a gap of 0.031" prompting me to believe they were the originals from 1995. The plugs I installed have a gap of 0.044" - I didn't want to mess with changing the gap manually. I was prepared to repeat the procedure and take them off in case misfire or lack of performance, or drop in fuel economy. To my surprise, the car has a lot of pep to it. Acceleration is markedly improved, the engine runs smoothly, and fuel economy is 28 mpg on a 200 mile trip running at a steady 70 mph. I couldn't be more pleased.

RA40

iTrader: (6)

That passenger side was a PITA, good thing the suggested this service interval is every 60K.

nthach

.44in, use Denso or NGK plugs. Bosch platinums don't fly well with me.

ychachad

I have used Bosch platinums in my Toyota Celica GT, Infiniti G20, Nissan Maxima, 92 LS and now 95 LS with great satisfaction. I have also used expensive Irridium plugs in the past without any significant fuel mileage or performance gains. And at $12 per plug (at the time) it only left my wallet thinner. The Bosch plugs are a bargain at $2.17 a peice.

nthach

i had 160,000 miles on the OEM Denso PK20R-11s, and i used the same OEM Densos, Why mess with success?