hey there,
I recently rebuilt my heads and threw out the spark plugs before noting the part number. so i bought some ngk tr55 as replacement. problem is they don't fit the Motorcraft coil boot, they are too loose. so I went to advance auto with coil in hand and I test fit them on Motorcraft factory replacement plugs and they are just as loose. I mean don't even make contact loose.
I'm used to the plug boot fitting tightly, is this not the case with this design??
I honestly can't remember how they fit before I tore down for rebuild.
Thanks!
I recently rebuilt my heads and threw out the spark plugs before noting the part number. so i bought some ngk tr55 as replacement. problem is they don't fit the Motorcraft coil boot, they are too loose. so I went to advance auto with coil in hand and I test fit them on Motorcraft factory replacement plugs and they are just as loose. I mean don't even make contact loose.
I'm used to the plug boot fitting tightly, is this not the case with this design??
I honestly can't remember how they fit before I tore down for rebuild.
Thanks!