The thread insert fix for snapped exhaust studs - Discovery 4 3.0L TDV6

Here at JAS we fix problems...even unforeseen problems such as this one! When removing the exhaust (to remove the gearbox to replace the torque converter!) one of the exhaust manifold bolts snapped - leaving a section stuck in the turbo housing...this is how we went about solving the issue despite the restricted space!!

The bolts themselves are a heat-treated stainless and the turbo housing manufactured from a high-alloyed austentic cast iron...due to the excessive heat from the exhaust gasses and the age of the vehicle the heat-treatment of the bolts eventually breaks down and the bolt and housing start to seize together...this is the result!

Also, the relatively small size of the bolt (only 8mm in diameter) reduces the chances of being able to weld a nut onto the stud with sufficient strength to allow the snapped section to be unscrewed.

Helicoil to the rescue!

Видео The thread insert fix for snapped exhaust studs - Discovery 4 3.0L TDV6 канала JAS LR