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#1 |
Senior Member
![]() Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,248
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Questions about exhaust manifold bolts and oil dipstick tube
71 C-10 402
Based on truck history, I'd have guessed these or most would be the original exhaust manifold bolts. Perhaps they are, but what a hodge podge. Some grade 5 & some grade 8. One is grade 2, which I bet we added when the A/C was pulled long ago. Are the exhaust manifold bolts "supposed" to be grade 5 or 8? I'd guess 5.............................. On a side, Classic industry sells "original reproduction flange head bolts" for the exhaust. Not that I have much experience, but neither of my trucks have flange bolts. They're just a hex head and use lock washers. The dip stick tube I pulled didn't have an O-ring, are they supposed to? From what I see there wasn't a leak. Thank you.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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