13-10-2018, 06:39 PM
(13-10-2018, 05:45 PM)Chris KC Wrote: Apologies if covered before, but many cylinder blocks now have small cracks radiating out from the centre head stud. The general consensus seems to be use another one if you have the choice.
I'm curious, has anyone actually suffered an engine failure as a result of these cracks?
And if yes, what happened? (Water in the bore? Stud pulled out? Or something more dramatic...?)
Anyone found a way to repair them?
Thanks
Chris
Had this on my block several years ago. The problem is one of head gasket failure as the stud when the engine gets hot no longer retains its torque thus water enters the bores and gases get blown into the coolant. As far as I can tel there is no cure . any helicoil would come loose like the stud and any attempt at welding the block would ,I suspect, cause irrepairable block distortion. Not sure if drillingthe block deeperand using a longer stud with some "plastic metal" would effect a temporary repair but somehow doubt it. Easier to get a replacement block.