Helicoil reliability
#1
03-26-05, 09:56 PM
Visiting Guest
Posts: n/a
Helicoil reliability
Hi. I just had to have a helicoil done on one of the spark plugs on my '94 Toy PU. Could anyone tell me if this repair is going to last or should I replace this part of the block? Thanks.
Sponsored Links
#2
03-26-05, 10:17 PM
Member
Join Date: Aug 2003
Posts: 478
If done correctly it will be stronger than the original threads in either cast iron or aluminum. 
The reason is the outside of the helicoil is a little larger than the original threads so that is stronger. Then the heli coil is stainless steel which is stronger than aluminum or 
cast iron.
The reason is the outside of the helicoil is a little larger than the original threads so that is stronger. Then the heli coil is stainless steel which is stronger than aluminum or 
cast iron.
#5
03-27-05, 08:27 AM
Member
Join Date: Aug 2003
Posts: 478
I forgot to mention, if you have an aluminum head there are 3 things that can cause stripped threads.
Overtightening, not using anti sieze (on the theads only), and removing the plugs when the engine is hot.
Also never use your ratchet to screw the plug in untill you have screwed it in several turns with your fingers.
Follow these tips & you won't need any more helicoils.
Overtightening, not using anti sieze (on the theads only), and removing the plugs when the engine is hot.
Also never use your ratchet to screw the plug in untill you have screwed it in several turns with your fingers.
Follow these tips & you won't need any more helicoils.
#6
03-27-05, 08:30 AM
Visiting Guest
Posts: n/a
Thanks! That's good to know. Taking out the spark plug won't damage the helicoil, though, will it?
#7
03-27-05, 06:11 PM
Member
Join Date: Feb 2005
Location: canada
Posts: 1,561
If the helicoil is installed correctly, you won't hurt it. As mentioned before, put some Anti-sieze on the plug thread, & NEVER service plugs in a hot engine. The Heli-coil will last forever 
Make sure you torque the plugs to spec when installing new ones because they don't need to be as tight as a lot of people think 
Make sure you torque the plugs to spec when installing new ones because they don't need to be as tight as a lot of people think 
«
Previous Thread
|
Next Thread
»
Linear Mode
