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Old 09-11-2020, 09:22 PM   #1
Chili
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Default How do I get these bolts out?

The DS exhaust manifold gasket has failed on my Nova, and while looking at it I realized i don't have any way to get to a couple of these bolts. Is there any specialized tool that will help me here?





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Old 09-11-2020, 09:37 PM   #2
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those dont look like they have the rounded head on them, get some Allen's that allow you to approach from an angle

edit: looks like they're called "ball end"
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Old 09-11-2020, 09:55 PM   #3
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Seems kind of odd to have allen bolts on an exhaust manifold
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Old 09-12-2020, 03:42 AM   #4
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You cut the Allen wrench down closer to the 90 and slightly bevel the edges.
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Old 09-12-2020, 09:29 AM   #5
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Hex ball driver set.
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Old 09-12-2020, 10:28 AM   #6
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Quote:
Originally Posted by lowthreeohz View Post
those dont look like they have the rounded head on them, get some Allen's that allow you to approach from an angle

edit: looks like they're called "ball end"
Quote:
Originally Posted by garycrist View Post
Hex ball driver set.
Awesome, thanks for the tips! Like these, right?

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Old 09-12-2020, 10:30 AM   #7
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Quote:
Originally Posted by dsrtuckteezy View Post
Seems kind of odd to have allen bolts on an exhaust manifold
There are a number of places where they're used on this engine, I've not see that either.. There's also a combination of hack jobs, and good work. lol
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Old 09-12-2020, 10:31 AM   #8
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Quote:
Originally Posted by beefed88 View Post
You cut the Allen wrench down closer to the 90 and slightly bevel the edges.
That kind of thing was my fear, but I figured there must be tools actually designed for that! Haha
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Old 09-12-2020, 10:54 AM   #9
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Ball end or stubby allens, or you could just cut down that one to fit
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Old 09-13-2020, 08:10 PM   #10
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Go back in with a reduced head diameter 12 point bolt if you want to make your life easier. Even then you might have to dimple that header a little.
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Old 09-14-2020, 09:58 AM   #11
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Quote:
Originally Posted by beefed88 View Post
You cut the Allen wrench down closer to the 90 and slightly bevel the edges.
That's what I would do. Make the short end of the allen wrench shorter. Like maybe 1/2".
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Old 09-14-2020, 12:41 PM   #12
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Buy new shorty headers that are ceramic coated and install new grade 8, 12 point bolts with locking washers or plenty of lock tight. Shortys will work very good on N/A cars.
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Old 09-14-2020, 01:47 PM   #13
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Heat up the header and smack it in a bit with a ball pein hammer to make room for your allen wrench?
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Old 09-14-2020, 01:54 PM   #14
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Thanks for the suggestions on modding the allen wrench and / or massaging the headers, but I think I'd rather just spend $15 for the correct tools.
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Old 09-15-2020, 03:24 AM   #15
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Quote:
Originally Posted by Chili View Post
Thanks for the suggestions on modding the allen wrench and / or massaging the headers, but I think I'd rather just spend $15 for the correct tools.
You're funny. To get full amount of leverage on rusty header bolts a cut down Allen is the correct tool. Ball end hex drivers should be in your toolbox but in your scenario may not give you the full contact inside the Allen head that you may require.
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Old 09-15-2020, 09:37 AM   #16
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I probably would've used vise grips to break them loose and hopefully walk them out with my fingers, then throw that garbage in the trash and reinstall some ARP header bolts for $15.00. Or $30 if you want the stainless 12 point ones.
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Old 09-15-2020, 09:46 AM   #17
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Quote:
Originally Posted by beefed88 View Post
You're funny. To get full amount of leverage on rusty header bolts a cut down Allen is the correct tool. Ball end hex drivers should be in your toolbox but in your scenario may not give you the full contact inside the Allen head that you may require.
I know that the ones I can access were fairly easy to move, so I'll keep the modification suggestions in mind in case I have trouble..
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Old 09-15-2020, 09:48 AM   #18
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Quote:
Originally Posted by BP View Post
I probably would've used vise grips to break them loose and hopefully walk them out with my fingers, then throw that garbage in the trash and reinstall some ARP header bolts for $15.00. Or $30 if you want the stainless 12 point ones.
They're all over on this engine too.. In that first pic you can see the thermostat housing uses them, and you can even see one on the opposite side of the valley.
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