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Valve Cover Bolts Bottoming Out

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Old Jan 8, 2017 | 03:51 PM
  #1  
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Valve Cover Bolts Bottoming Out

Hi Guys,

Purchased some new tall Mr. Gasket valve covers to provide some additional rocker clearance. Attempted to assemble today (after getting the forsaken gasket on) and I notice that I'm not able to drive the included bolts down tight enough to do.. Well, anything. The bolts are bottoming out long before they make any sort of contact with the valve cover.

I'm running Pro Topline 350C (Vortec) heads. I'm not sure if I'm better off just cutting the bolts to fit or if there's a better alternative.

Has anyone else run into this before?






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Old Jan 8, 2017 | 03:59 PM
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Re: Valve Cover Bolts Bottoming Out

Did these come with a gasket or did you have to buy that separately? If this is doing it with a supplied gasket, I would probably either trim the bolts, or check and possibly tap the holes deeper (if they're deep enough and just not fully threaded). If they're threaded but not deep enough, and you've got the right gasket, I would just trim the bolt down.
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Old Jan 8, 2017 | 04:59 PM
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From: Northern, CA
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Valve Cover Bolts Bottoming Out

If you trim them put a nut on it first then a really fine hack saw blade will work.
Cut between the threads on there angle then remove the nut in-order to straiten out the threads. Works every time.

Either that or just buy shorter bolts at a hardware store.
They should have those in the "nut" and "bolt" pull-out drawer section.
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Old Jan 8, 2017 | 07:25 PM
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Car: 1 Owner 1986 TA with a WS6 package
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Re: Valve Cover Bolts Bottoming Out

Originally Posted by Ron U.S.M.C.
If you trim them put a nut on it first then a really fine hack saw blade will work.
Cut between the threads on there angle then remove the nut in-order to straiten out the threads. Works every time.

Either that or just buy shorter bolts at a hardware store.
They should have those in the "nut" and "bolt" pull-out drawer section.
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Old Jan 8, 2017 | 07:42 PM
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From: Brainerd, MN
Car: '84 Trans Am
Engine: 357 SBC
Transmission: 700R4
Axle/Gears: 10 Bolt 3.73, Torsen Diff
Re: Valve Cover Bolts Bottoming Out

Sounds like a plan. My first instinct was to cut them to fit. This is my first set of center bolt heads so I wasn't sure if this was somewhat common or not. I'd like to use these since they're stainless and they're flush mount. I was tempted to complain to Mr. Gasket but I figure they'd probably just blow me off anyways.
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Old Jan 8, 2017 | 08:13 PM
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Car: 1987 iroc
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Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: Valve Cover Bolts Bottoming Out

Originally Posted by Jorlain
Sounds like a plan. My first instinct was to cut them to fit. This is my first set of center bolt heads so I wasn't sure if this was somewhat common or not. I'd like to use these since they're stainless and they're flush mount. I was tempted to complain to Mr. Gasket but I figure they'd probably just blow me off anyways.
I bought a set of chrome aftermarket "tall" cover's, and I use Felpro cork laminated with steel gaskets. I had to dremel off about 1/4" and then touch the ends on my bench grinder at an angle to taper them just a tad. Worked just fine. By the way, i don't like those silicone gaskets because they are a PITA to stay on while installing.
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Old Jan 8, 2017 | 08:17 PM
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From: Brainerd, MN
Car: '84 Trans Am
Engine: 357 SBC
Transmission: 700R4
Axle/Gears: 10 Bolt 3.73, Torsen Diff
Re: Valve Cover Bolts Bottoming Out

Originally Posted by red rock
By the way, i don't like those silicone gaskets because they are a PITA to stay on while installing.
True story. I ended up using some adhesive to hold them in place long enough for me to set them on the heads. Even that was a PITA.
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