Hi
Replaced my plugs today and when i went to put on the rear rotor trailing plug boot it wouldnt 'pop' on like the others did, ive read about other people having a spring fly out of the boot but i am unaware of this happening. Its on as hard as i can push it and doesnt come off.

Car starts instantly and pulls hard all the way, should i be worried at all ?

Was possibly considering Magnecores anyways should i get them as soon as or wait until i see a problem?

And it any problems were to come of this would i be able to feel/recognise something wrong ?

Thanks

 

I would compare the "insertion" distance with the other plugs.
If you notice its pulled-out a little more, try again.
If they look the same, may not have to worry about it.
I've had times where I couldn't recognize the pop too.

If your car starts generating misfire codes, you know where to look first

 

the metal clip at the bottom of the boot might be either open a bit too much, or closed a bit too much. That's what slips over the metal end of the plug and if it's the right fit you'll feel the "pop". Take the wire out of the car and check it with an old plug. You might have to squeeze the clip a bit, or open it up a bit. It can also help to use a bit of dielectric grease between the ceramic of the plug and the rubber section of the boot that seals with it. That can help the boot slide home, and it also serves the purpose of preventing water intrustion and helps keep the boot from fusing to the plug over time.