<VV> Stuck valve cover bolt.

[Frank DuVal]

1/4-20  

Left hand drill bit. Harbor freight has set. 

Frank DuVal 

> On Feb 8, 2018, at 10:13 PM, BBRT via VirtualVairs <virtualvairs at corvair.org> wrote:
> 
> IF you have really boogered up this thing, and you cannot drill it out.. Why
> not? Normally a 1/2-20 is pretty soft, unless you stuck a Grade 8 in there.
> I am trying to understand how the head broke off. Over tighten? Too long and
> it bottomed out over tightened? Previous person could have caused bolt to be
> near failing.. That size bolt doesn't take much to turn it off.  
> Anyway, if all else fails, take it to a machine shop.  Yes, remove the head
> and ask them to fix it.   Use a vertical mill and cut out bolt remainder.
> Depending on damage, use a helicoil or thin sert or even a thick sert..
> Or.... a machine shop can drill a bigger hole, insert a rod of aluminum, fix
> it in place, then drill and tap. You can do this at home as well, IF you can
> get the old one out.
> Good Luck
> Chuck S
> 
> -----Original Message-----
> From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of
> Matt Nall via VirtualVairs
> Sent: Thursday, February 8, 2018 9:45 PM
> To: virtualvairs at corvair.org
> Subject: Re: <VV> Stuck valve cover bolt.
> 
> -----Original Message-----
> From: Ignacio Valdes
> 
> Hi, The head broke off on this valve cover bolt. I've tried multiple ways
> of getting it out drilling, weld a nut on,easy outs, without success.
> Professional local shops in Houston Texas I tried are passing on this
> because too old, still on the car, don't want to mess with it, etc.  Any
> advice is appreciated.
> 
> Also, what is the preferred tool for holding the rocker stud from spinning
> when you take the rocker arm nut off?
> 
> ============================================
> 
> 
> Keep drilling.. your only choice now...
> 
> 
> Stud backing  out with Rocker nut is common today.....  leave it as one
> piece and re-install and Torque just a normal.....  if it holds it is good..
> 
> 
> Matt Nall
> Charleston, Oregon
> http://tinyurl.com/The-Corvair-Patio
> 
> http://tinyurl.com/Matts-Tech-Pages
> 
> 
> 
> 
> 
> 
> 
> 
> 
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