When the back 2 bolts on my exhaust manifold broke, they broke off
right at the head. I took the manifold off and was able to back the
bolts out by hand. Had they been more stubborn, there was plenty of
bolt sticking out to get a vice-grip on.
Ted
On Wed, Mar 24, 2010 at 2:29 PM, Ray Block <BPracing@wowway.com> wrote:
>
> > -----Original Message-----
> > From: Phillip Batson
> >
> > Took my 2000 4.7 4x4 into the shop because I thought the exhaust pipe on
> > the left side had broken away from the manifold. They got it up on the
> > rack and showed me the pipe was just fine.....but the head gasket is
> > blown. <sigh> Guess it could be a good time to buy those Gibson manifolds
> > I've always wanted...
> >
> > So he gives me a guesstimate of $1500-$2000! Ouch.
> >
> > So anyone heard of Thermagasket from http://www.rxauto.com/index.htm? Any
> > good? Just wonder what that does to the heater core...
>
> Ok, I'm confused (nothing new actually). I'm guessing you heard some
> exhaust noise. Shop says exhaust is fine but your head gasket is blown?
> I'm having trouble believing you would have a blown head gasket without some
> drivability symptoms. I also find it odd that you would hear exhaust noise
> from it and that it would be visible.
>
> FWIW, I have a 2000 Jeep GC 4x4 with the 4.7 and have raced it for 10 years
> with no issues. I've also trailered my Dak behind it for over 6000 miles
> with no issues.
>
> So....just how does one blow a 4.7 head gasket in daily driving? I have not
> heard of that being common but I have heard of exhaust manifold bolts
> loosening or breaking and causing an exhaust leak. (not on mine
> though...knock on wood)
>
> If it were me I'd be getting another opinion from a different shop.....after
> putting a wrench on every manifold bolt myself to eliminate that
> possibility.
>
> Ray
>
>
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