TwinTurbo.NET: Nissan 300ZX forum - I've never had the exhaust manifold studs break.
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Subject I've never had the exhaust manifold studs break.
     
Posted by MixManMash on December 27, 2018 at 11:11 AM
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In Reply To Exhaust manifold studs... posted by JMartz on December 27, 2018 at 10:17 AM
     
Message I have had turbo to downpipe studs break. Many times, I have seen the nut seize onto the studs, and the whole stud back out of the cylinder head.

My recommendation is to spray them with something like PB Blaster or the Royal Purple Maxfilm and let it sit for several hours.

Sometimes going forward and back helps to break them loose and reduces the risk for breaking studs.

     
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