XJR 1200 1300 Stud removal2011

XJR 1200 1300 Stud removal & replacement The following information is supplied free and is only a guideline I cannot take any responsibility for sheared studs or stripped threads. 1. This job is best done with the front pipes removed completely ( see manual for exhaust removal ) 2. I found a slightly warm engine ( not hot ) made the job easier, if by now you haven’t undone the original header nuts, give them a bit of a spray with WD40 or the likes and remove using 13mm socket (In the case of very badly corroded nuts a 12mm socket driven on firmly & square should do the job ) 3. Remove the header pipes away from the exhaust ports completely. 4. Spray a little more WD40 to the base of the stud where it meet the cylinder head leave it to soak for 10 mins or so ( overnight if you have the time to spare ) 5. With the studs exposed and still in place screw on to the stud a 13mm open nut down to about 15mm then fit another 13mm open nut down on top of the first ( see fig 1 exhaust not removed in this pic ) using whatever 13mm spanners or sockets you can get in ( the inner ones have less room around them because of the engine frame )and tighten the two nuts against each other locking them up. fig 1 ( shows exhaust still in place ) 6. Using a good fitting 13mm ring spanner/socket apply anti – clockwise pressure to unscrew the thread if this feels really tight try applying clockwise pressure first just a fraction of a turn then anti-clockwise.