958 spark plugs and coils replacement
#1
958 spark plugs and coils replacement
Removed all 8 of them but the ones near the firewall, number 4 and number 8 are PITA to remove, make sure you have several swivel connector and extensions or prepare to remove the cluster of pipes, I worked creatively to get my fingers behind and bended some plastic clips but be careful with those.
The only concern was careful with cross threading the spark plugs, I put several drops of dielectric grease on the thread both bottom and upper ceramic part and once dropped them in the holes I hand tightened them half way then un tighten 1/4 round to make sure the grease worked its way into the hole and feel the smoothness before tighten all the way.
The old plugs were kinda dirty looked burnt but being plugs that's how they are supposed to look like make sure the tip is kinda grey tanned, the threads would almost always smoked not too worried about that.
I am not sure how to post multiple images I am gonna repost 1 by 1
The only concern was careful with cross threading the spark plugs, I put several drops of dielectric grease on the thread both bottom and upper ceramic part and once dropped them in the holes I hand tightened them half way then un tighten 1/4 round to make sure the grease worked its way into the hole and feel the smoothness before tighten all the way.
The old plugs were kinda dirty looked burnt but being plugs that's how they are supposed to look like make sure the tip is kinda grey tanned, the threads would almost always smoked not too worried about that.
I am not sure how to post multiple images I am gonna repost 1 by 1
#6
Rennlist Member
Good work. I did mine about 6 weeks ago (958 CTT) and had similar observations as you.
Fairly easy DIY. I documented similar to you, but my pics turned out quite dark.
I'm still looking for torque specs.
Fairly easy DIY. I documented similar to you, but my pics turned out quite dark.
I'm still looking for torque specs.
#7
i have the workshop lights shooting right at the hood, i just cant work well without good lightings.
torque for spark plugs were 21 lb ft as specified on the bosch boxes, alldata diy manual says 22lb ft, i went with 21 as i had bad experience with over torquing and heard horror stories for broken plugs in cylinders.
as far as the screws that secure the coils i just hand tighten them i did manage to still break one so any one reading this please be careful with these fragile little things.