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Does the 3400 crossover pipe use gaskets?

 
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MISHNAH
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2002 Chevrolet Impala
2006 Mercedes-Benz E Class
2006 Nissan Murano
2003 BMW 5 Series


PostPosted: Sat May 25, 2013 5:49 pm    Post subject:  Does the 3400 crossover pipe use gaskets? Reply with quote

Does the exhaust crossover pipe have gaskets where it mates with the exhaust manifolds, or is it a metal-on-metal connection?

Might be digging deep into my engine soon, and I'm trying to make sure I have everything ready. Parts sites list gaskets which seem like they would go on the crossover, but the GM parts books dont show one. Confused

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98ss
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2002 Chevrolet Impala
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PostPosted: Sun May 26, 2013 9:39 am    Post subject:   Reply with quote

Metal on metal. What I have found that works for me when taking the nuts off of the flanges. Soak it in PB blaster. Break out the tap and die set and get the m8x1.25 out and run that sucker all the way up the studs, then even though you are not supposed to, flip the die around and run all the way up. You will be less likely to break a stud that way. When I encounter the 31,3400 series I usually will pick a spare set of studs from the dealer just incase.
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