Turbo exhaust flange bolts

[longbeachisland]

I have ’06 QSB 5.9s that are getting some winter rehab. I am in the process of replacing original rear motor mounts and am attempting to disconnect the exhaust so I can freely jack the engine with a thin hydraulic ram. 

Zero success loosening the 4 turbo flange bolts so far. I’ve tried all of these: kroil cycles, heat with torch, box wrench/ring spanner, and my last unsuccessful attempt was with a low profile bolt extractor. 

Any final tricks? Is my last option to cut the heads with a dremel? Given how much of a battle these are I worry about getting the remaining thread of the bolt out afterwards. 

Any and all tips greatly appreciated! 

 

Topic

[Tony Athens]

Internal 8 MM Threads in the turbo casting are OK?  Do they need “chasing” or cleaning up  with a tap?

Lots of anti-seize on the new hardware/bolts..  Don’t over tighten the new cap screws– Use a graphite gasket–it’s superior 

Turbo is 100% good —

But curious–How long had the engine not run when these pics were taken?

[longbeachisland]

Thanks Tony. Grinder did the trick.

Pics of turbo attached. 2000 hours on these. Replacing gasket and bolts next. 

1 user thanked author for this post.

Rob Schepis

[Tony Athens]

Looks like you are already past the point of using a 6-point box wrench.

Cut them off and once that is done,  you should have about 1/2″ +  of stud left to deal with 

Concentrated heat from the right torch on the stud and vice grips   

 

New proper hardware/ graphite gasket  and anti-seize on the new bolts 

Let’s also  see inside your turbo outlet  as to why it seems it may be extra rusty?

[Author]

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