View Full Version : Exhaust Manifold stud/nut
Livin' in the 80's
03-22-2017, 06:33 AM
In checking the block numbers on my new purchase, I discovered by accident that it is missing a rear exhaust manifold stud and nut/other hardware. Is this typical and are there other bolts and fasteners to look for that loosen on these ZR1's? I will be checking the others to see if they are tight.
Where would I get the original hardware or would anyone have some from an exhaust swap that they would want to part with? I would want at least two sets in case there are any more that I haven't checked
-=Jeff=-
03-22-2017, 09:23 AM
Keep in mind I doubt any ZR-1 with OEM manifolds has all the bolts in them as not all the bolts were installed originally
efnfast
03-22-2017, 10:45 AM
Each of our manifolds have 16 bolts, regular SB chevy has 6 (i think) on each side.
I think everyone who first looks at their "new" ZR-1 notices all the missing bolts in the exhaust header flange, including me. In actuality, they were never installed.
Here's a link to an image on my website regarding exhaust manifold bolt placement. Nice thing is,,,, all the holes are tapped in the cylinder head which is a good thing when headers are installed.
http://www.jerrysgaskets.com/bolt-exhaust-manifold-90-95-1d2/
Livin' in the 80's
03-22-2017, 12:47 PM
I think everyone who first looks at their "new" ZR-1 notices all the missing bolts in the exhaust header flange, including me.
Here's a link to an image on my website regarding exhaust manifold bolt placement. Nice thing is,,,, all the holes are tapped in the cylinder head which is a good thing when headers are installed.
http://www.jerrysgaskets.com/bolt-exhaust-manifold-90-95-1d2/
Would it hurt to put in the missing bolts in the stock manifolds in the miss g holes?
It wouldn't hurt anything, but why bother doing if not leaking?
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Livin' in the 80's
03-22-2017, 10:37 PM
It wouldn't hurt anything, but why bother doing if not leaking?
Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)
Good point. Thanks for the information. You would think with the stress of everything, more bolts would be needed. I have seen plenty of gm products loosing or breaking bolts holding the exhaust manifolds on.
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