What are these bolts for?

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Mark48
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What are these bolts for?

#1

Post by Mark48 » Wed Dec 05, 2018 6:36 pm

Hi, question, what are the 2 bolts located next to the intake manifold used for.
Front one seems to have been broken off and ground down, should I get that front one repaired soon ?
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Buddhahoodvatoloco
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Re: What are these bolts for?

#2

Post by Buddhahoodvatoloco » Wed Dec 05, 2018 6:56 pm

Hombre, pictures a bit fuzzy. But those are the set screws [dowels] for the plumber intake nipples. Check if you have a intake leak, if you don't, "I" wouldn't fret about them.

Mark48
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Re: What are these bolts for?

#3

Post by Mark48 » Wed Dec 05, 2018 7:02 pm

Thank you for the info

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Re: What are these bolts for?

#4

Post by awander » Wed Dec 05, 2018 8:44 pm

They are supposed to be rivets, unless I am mistaken.

RUBONE
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Re: What are these bolts for?

#5

Post by RUBONE » Wed Dec 05, 2018 9:57 pm

Depending on the year of the heads, H-D tried a bolt for a short period.

Mark48
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Re: What are these bolts for?

#6

Post by Mark48 » Wed Dec 05, 2018 10:39 pm

Thanks guys

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Re: What are these bolts for?

#7

Post by RUBONE » Fri Dec 07, 2018 1:41 am

The "bolts" should not have a normal head and should be drilled. The "nuts" are oversized and should have holes in them for a cotter pin.

Mark48
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Re: What are these bolts for?

#8

Post by Mark48 » Fri Dec 07, 2018 3:55 am

Here is a better close up of the manifold bolts. The one on the left is a real mess. I don’t think I have a intake leak, but if I wanted to do a test, I’m not sure how that broken bolt would affect the procedure as far as being able to make any adjustments or tighting up.
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Re: What are these bolts for?

#9

Post by RUBONE » Fri Dec 07, 2018 5:58 am

Not the factory set-up. Someone added those when they did the O-ring conversion.

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