470hp etech leaking rear studs on exhaust

[Gorilla]

Hey everybody,

Today i took the turbo off as im getting it rebuilt with new bearings as it showing signs of wear and better to catch it early before you have to replace housings.

Anyways rear bottom exhaust stud was wet around it with oil so i figure time to address this BUT need some advice.  Best part is when i went to feel what sort of oil it was on my fingers i was able to unbolt the stud with my fingers which kinda made me think special thoughts ;).  Would some moron who worked on the truck not bolt it up properly or am i looking at a bigger problem?   the thread felt find when i bolted it in and no evidence of damage?

Im intending on replacing the exhaust gasket, do i need to change the bolts and all the studs while im at it?

What is the best method to stop the studs leaking oil? 

Do i need to put new bolts for the turbo too? (when i reinstall it)

Also have build up off oil on the rear of the motor, are these motors known to do sump gaskets ?

Anybody know a good place to get the bits in melbourne australia? or at least australia?

Edited Sunday at 02:00 PM by Gorilla

[Joey Mack]

All of the lower studs go into the pushrod bores. They are sealed with high temp thread sealant.  They also only screw in about 16mm. Look inside the hole to see the push rod and how close it is...  It is possible to go in too far and hit the push rod.