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Re: eBay Long Tube header install... pics inside
Quote:
Originally Posted by biggsteve97
Well, unless they left a perfectly smooth machined surface that happens to be almost the exact diameter as the holes in the exhaust manifold when they were broke then no they are guide pins. I also have a 6.0L from a 2000 2500 and it has the same pins in it as well. So apparently some off these engines did in fact come with guide pins. I will take some pictures tonight and post them on here.
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I promise you, they're broken off manifold bolts and it's an extremely common problem which is why your other 6.0 has the same thing. The factory bolts aren't threaded all the way to the hex head, and most of the time they shear off right behind the head leaving a smooth shank sticking out of the cylinder head. I've been modding/building these LS motors for over 10 yrs, and I'd say 75% of the motors I've touched had at least one bolt snapped off, and probably 50% had 2 or more. Here's a pic of what the bolts look like:
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'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread
'98 Camaro z28: 370ci twin turbo 370ci build
'01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD
Last edited by swb85; 04-29-2011 at 03:06 PM.
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