Can you fix a strip sparkplug hole with head on the car.If so how?

 

You can fix the hole, but then you will have metal shavings in your cylinder. Odds are you won't be able to get them all out

 

Heli coil kit for spark plugs... Cost around 30-50 dollars.... Comes with everything you need..

 

Once you get all the stuff out of the way...yes.

Heli-coil kits will work ok, but I prefer Time-sert kits for spark plug applications. It is a full insert rather than just a coil.

Either way, put some grease on the drill and tap so that the shavings stick to them and stay out of the cylinder, then leave the plug out and crank it over a bit to blow anything left out.

Yes it is preferable to do with the head off, but I have never had a problem with a head-on installation.

 

Time-sert kit is what alot of Gen2 Lightning guys swear by.

 

Getting enough room to do it will be the biggest problem (depending on which one it is).

 

yes, there is a tool i bought from napa Called a back tap when i had this same problem it goes into the cylinder then opens up and lets you back tap the hole so all the shavings go outside the motor not inside. i was able to do this on cylinder # 2 without removing anything and thats about the hardest spark plug to change let alone try to tap with the head on the car. I don't have napas part # but i have snap on's if you know a snap on tool dealer or want to purchase it from there site heres the part # SPHR1- expect it to run about $75 bucks from them and i believe thats how much i paid from napa. hope this helps

 

Yeah - it's a little different situation with the 4.6/5.4L fords, they only have 4 threads...a horrible design - so I do a time-sert (actually "big-sert" in this case) install at least once a week on those heads, the local dealerships send them down to us for warrenty issues, or our service department does them in the vehicle. I had the unfortunate experiance of doing a favor for a freinds mom where I did a big-sert install on the number 7 cylinder in her f-150...OMG that sucked- had to do it all by feel.

 

Thanks for all the help with this problem. Its helps having some good ideas about how to fix it.