[spinj]

Can ya tell me the right plug gap for a 85 L98 engine please?? Under hood says .035 and the parts guy says .045. Need help here.

thanks .

 

[U C Brother]

I would go bythe emission sticker that's on the car.

 

[hoopty]

:agree: :agree: :agree: :agree: :agree: :agree: :agree:

 

[The Shield]

.035

 

[William C Mc]

plug gap

GM had a recall to change plug gap to .035

 

[glasrtlr]

old rule of thumb is that you will gain .001'' gap every thousand miles due to erosion of the electrodes...so unless you re-gap every couple thou miles, no sense worrying 'bout 'tit.

for reduced emissions at idle, a wider gap (up to .060'') will help....under load, the tighter gap produces fewer misfires and more power.

i gap sbc plugs using the ''go-no go'' method --an .035'' wire gauge will ''go'' thru the gap, and an .040'' wire will not.

be careful that you do NOT damage the porcelain center insulator when adjusting the gap.