7831
Omega General Help / Re: Major misfire on idle, 2.2 petrol manual
« on: 04 April 2018, 00:05:09 »
If you can get to the snapped studs and drill them out ,they are pretty soft
(using good quality sharp/new drill bits)
i started with a center punch, 1.5mm , 3mm, 5mm
(depth stop marking with tape on the bits,you don't want to go too deep)
then if you have an easy out extractor set?
the stud nuts are brass/copper and soft(sacrificial in comparison to the stud),
often swapped for steel nuts ,which get over torqued and snap studs
when fitting an exhaust manifold , treat it like you would a cylinder head
evenly tighten gradually by hand, (no air tools ,impact drivers)
i've seen studs screwed into the head past the fat section of the stud (splitting the head)
(using good quality sharp/new drill bits)
i started with a center punch, 1.5mm , 3mm, 5mm
(depth stop marking with tape on the bits,you don't want to go too deep)
then if you have an easy out extractor set?
the stud nuts are brass/copper and soft(sacrificial in comparison to the stud),
often swapped for steel nuts ,which get over torqued and snap studs
when fitting an exhaust manifold , treat it like you would a cylinder head
evenly tighten gradually by hand, (no air tools ,impact drivers)
i've seen studs screwed into the head past the fat section of the stud (splitting the head)