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Old 07-25-2012   #1
sdycke
 
Join Date: Jul 2011
Location: grosse isle, manitoba, canada
Posts: 52
Default ex manifold bolts falling out?

I just noticed several of my exhaust mainifold bolts are missing (that I can see). weird. Vibrated loose? Are these cars known for this? The threaded holes are shinny on some....recent loss? My question is do these cars come with 16/side like one would think? FSM pp 6A2-33 shows 6 which almost corresponds to the ones I have left....Very wierd....And can you get the spacers anywhere.......thanks
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Old 07-25-2012   #2
DaveK
 
Join Date: Jul 2004
Location: Sudbury, Ontario. Canada
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Default Re: ex manifold bolts falling out?

I don't believe that they were all installed from the factory. Someone else can confirm I'm sure.
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Old 07-25-2012   #3
Pete
 
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Location: Chicagoland,IL
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Default Re: ex manifold bolts falling out?

Quote:
Originally Posted by DaveK View Post
I don't believe that they were all installed from the factory. Someone else can confirm I'm sure.

Yes.
Came like that from the factory.

On my headers i only have 2 per tube across/kiddie corner of each other.

Pete
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Last edited by Pete; 07-25-2012 at 11:43 PM.
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Old 07-25-2012   #4
secondchance
 
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
Default Re: ex manifold bolts falling out?

No - exhaust bolts are not falling out. We, the WAZOO gang, have installed 3 or 4 headers and in all cases noted only 6 or so bolts were actually used per side for install at the factory although early LT5s have 16 bolt holes per side and 93+ cars have 14 bolt holes per side (top left and top right has dowels instead of bolt holes).
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Old 07-25-2012   #5
VetteMed
 
Join Date: Mar 2009
Location: Orlando, FL
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Default Re: ex manifold bolts falling out?

Thanks to the thick flanges, and very square sealing surfaces, few bolts are required in order to maintain adequate sealing.
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Old 07-26-2012   #6
sdycke
 
Join Date: Jul 2011
Location: grosse isle, manitoba, canada
Posts: 52
Default Re: ex manifold bolts falling out?

Thank you so much! You guys are great! Who would have thought?
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Old 07-26-2012   #7
mgbrv8
 
Join Date: Jul 2009
Location: Texas
Posts: 793
Default Re: ex manifold bolts falling out?

Yes when i removed my factory exhaust there was a number of bolts missing. When I put the obx's on I put them all in

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