Interference

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January 19th, 2019, 04:56 PM

87Brougham

Kyle

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Location: Annapolis, MD

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Interference

Can't seem to get these bolts in for the life of me! Edelbrock 7111. Seems that the bolt head is interfering with the plenums and it can't even be positioned into place to be tightened. Anyone else had this problem? Techniques?

(Standby, trouble with pictures)

January 19th, 2019, 04:58 PM

87Brougham

Kyle

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January 19th, 2019, 05:18 PM

olds 307 and 403

Out of Line, Everytime😉

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The back one should go. The intake comes with a special 12 point, small head bolt for the front one you are having issue with. You can get two of them to fix them both.

January 19th, 2019, 05:19 PM

Greg Rogers

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Looks like you will have to use those allen head bolts, (Forget their proper name) Apparently the edelbrock manifold is too tight to use the stock bolts....

January 19th, 2019, 05:20 PM

87Brougham

Kyle

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Quote:

Originally Posted by olds 307 and 403

The back one should go. The intake comes with a special 12 point, small head bolt for the front one you are having issue with. You can get two of them to fix them both.

Oh, okay. I bought it used on eBay a couple months back. Thanks for the heads up!

January 19th, 2019, 05:20 PM

tru-blue 442

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Make sure you start them all 1st before making any tight.

January 19th, 2019, 07:43 PM

oldcutlass

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Quote:

Originally Posted by Greg Rogers

Looks like you will have to use those allen head bolts, (Forget their proper name) Apparently the edelbrock manifold is too tight to use the stock bolts....

They are called Socket Head Cap Screws

The 12pt Flange bolt per the suggestion above

January 19th, 2019, 07:58 PM

Fun71

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I used the 12 point flange bolts shown above. And Grade 8 thick washers. Don’t use regular Grade 5 as they will deform.

January 20th, 2019, 02:07 PM

87Brougham

Kyle

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Thank you all for your replies, I will have to find these online or call Edelbrock.

January 21st, 2019, 06:21 AM

#10

edzolz

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It might be the angle of the pic but it looks like the rear bolt is crooked. Make sure it isn't cross threaded before tightening it.

January 21st, 2019, 06:54 AM

#11

Texas69

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Location: Central Texas

Posts: 329

Bolts

Edelbrock sells a bolt kit for intake manifolds that includes the specialty bolts discussed above. While a bit overpriced, they are nice and shiny, and more importantly, they fit. May be worth looking into.

January 21st, 2019, 10:57 AM

#12

Fun71

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Or do like I did and go to your local hardware store and buy two bolts for those positions.

January 21st, 2019, 12:48 PM

#13

RetroRanger

72 Olds CS

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I had to turn down the head of a socket head cap screw to fit.

January 21st, 2019, 02:24 PM

#14

shiftbyear

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Posts: 651

Another thing to remember is most factory torque values are with the bolts oiled. I believe the intake manifold also has a torque sequence just like the heads. It may make a difference in getting a good seal. Good luck.