Missing Exhaust Manifold bolt

S

stephen thomas

New member
May 29, 2014
29
0
0
Hi All,

Im on the road having a bit of an issue. The center exhaust manifold bolt
hole (in the head) has broken and there's no way to tighten the bolt. The
noise from the resulting leak has gotten really bad.

If I get another gasket, should the remaining bolts hold the manifold well
enough to seal? Also, what gasket would be best for this?

We're in the middle of a road trip in Oregon, so I'm hoping for a fix that
will at least hold til I get back to Santa Cruz.

Thanks,
Steve Thomas
78 Eleganza
Currently in Coos Bay
 
What Jon Said. Helps to remove the fender liner to get some space to work in there. If you have a brass drift. or long socket extension you want
to put it on the remaining bolt heads and give them a sharp rap or two with a hammer. This will help shock them and hopefully make it easier to back
them out. (thats what Dave Lenzi advised me).

Be very careful with the remflex as they do not like to be bent at all. Work the new bolts in, in 5 pound increments on your torque wrench.
Start with the center two bolts then work out to the outside two. 5 pounds on the wrench at a time. So 5 passes.

Let it heat up then cool down and re check. If you have hi temp anti seize put a little on the bolts.

Not a bad job if your kind of skinny and can lay on top of the tire and reach in there.
--
77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy.
Mid Michigan
 
The center bolt acts as a hanger to allow you to manage the exhaust manifold, exhaust gasket, and the bolts without dropping everything. From the
description of your leak, sounds like the center bolt was tightened and pulled the manifold towards the top, allowing the gasket to shift. Broken
center bolt sounds like P.O. over compensated for the leak by continuing to tighten the bolt and eventually snapping it.
Use anti-size on the bolts. You can attempt to remove the broken bolt, but I might not worry too much about it.
Use the RemFlex gasket from JmK and you will be happy and quiet.
Tom, MS II
--
1975 GMC Avion
KA4CSG
 
As mentioned previously there are 2 Different Remflex gasket available depending on which exhaust setup you have.

Here are the part numbers and pictures for those gaskets.

http://www.gmcmhphotos.com/photos/general-pictures/p61525-remflex-gaskets.html
and
http://www.gmcmhphotos.com/photos/general-pictures/p61527-remflex-gaskets.html

I have found that Jim K has had the lowest prices for these the past few years. You probably at times can find them for less elsewhere.

JR Wright
GMC Great Laker MHC
GMC Eastern States Charter Member
GMCGL Tech Editor
GMCMI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan

>
> Or, support those who support you.
>
> http://appliedgmc.com/prod.itml/icOid/670
>
> bdub
>
>

>
>> Recommended to leave that bolt loose or out. So you are good there.
>> Just hope the other 4 are able to be removed.
>>
>> Amazon up a remflex set, and make sure you have a torque wrench that does
>> 15-20 pounds. Easy repair if the bolts do not breakk
>>
 
> What Jon Said. Helps to remove the fender liner to get some space to work in there. If you have a brass drift. or long socket extension you
> want to put it on the remaining bolt heads and give them a sharp rap or two with a hammer. This will help shock them and hopefully make it easier
> to back them out. (thats what Dave Lenzi advised me).
>
> Be very careful with the remflex as they do not like to be bent at all. Work the new bolts in, in 5 pound increments on your torque wrench.
> Start with the center two bolts then work out to the outside two. 5 pounds on the wrench at a time. So 5 passes.
>
> Let it heat up then cool down and re check. If you have hi temp anti seize put a little on the bolts.
>
> Not a bad job if your kind of skinny and can lay on top of the tire and reach in there.

If you don't have high temperature Anti-Seize, go get some.

Matt

--
Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
'73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
Now with both true Keyless and remote entry
SE Michigan - Twixt A2 and Detroit
 
Okay, good to know that the center bolt isn't critical. It would be great
to find a gasket locally and replace it before I do much more driving, but
if that can't happen, at least I won't be as worried about it now.

I'll be giving Applied a call in a little while.

Thanks so much for all the advice!

Steve
78 Eleganza

> As mentioned previously there are 2 Different Remflex gasket available
> depending on which exhaust setup you have.
>
> Here are the part numbers and pictures for those gaskets.
>
> http://www.gmcmhphotos.com/photos/general-pictures/
> p61525-remflex-gaskets.html
> and
> http://www.gmcmhphotos.com/photos/general-pictures/
> p61527-remflex-gaskets.html
>
> I have found that Jim K has had the lowest prices for these the past few
> years. You probably at times can find them for less elsewhere.
>
> JR Wright
> GMC Great Laker MHC
> GMC Eastern States Charter Member
> GMCGL Tech Editor
> GMCMI
> 78 GMC Buskirk 30’ Stretch
> 1975 GMC Avion (Under Reconstruction)
> Michigan
>

> >
> > Or, support those who support you.
> >
> > http://appliedgmc.com/prod.itml/icOid/670
> >
> > bdub
> >
> >

> >
> >> Recommended to leave that bolt loose or out. So you are good there.
> >> Just hope the other 4 are able to be removed.
> >>
> >> Amazon up a remflex set, and make sure you have a torque wrench that
> does
> >> 15-20 pounds. Easy repair if the bolts do not breakk
> >>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
That link has a price of almost $32 with shipping.

Amazon also has a Remflex 11001 which is the same except for the web down the middle of the center opening. (that is what is shown on Applied GMC site).
It is $23.02 plus about $1.00 tax (.67 to Colorado) tax with free shipping.
https://www.amazon.com/gp/offer-listing/B00B2HM10W/ref=sr_1_4_olp?ie=UTF8&qid=1476205874&sr=8-4&keywords=remflex+11001&condition=new

It shows temporary out of stock but they usually get it within a couple of days.

Emery Stora
77 Kingsley
Frederick, CO

>
> Recommended to leave that bolt loose or out. So you are good there. Just hope the other 4 are able to be removed.
>
> Amazon up a remflex set, and make sure you have a torque wrench that does 15-20 pounds. Easy repair if the bolts do not breakk
>
>
> https://www.amazon.com/gp/aw/d/B00B2HM1IE/ref=mp_s_a_1_1?ie=UTF8&qid=1476185859&sr=8-1&pi=AC_SX236_SY340_QL65&keywords=remflex+olds+455
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
I found that a Fel-pro gasket can be found locally. The fel-pro will work, if you have good mating surfaces. I have yet to find a box store that
has the remflex locally in stock, and can get them quicker ordering from amazon(next day). Jim K I would guess would have some, and he might even
have some there at Coos bay already.

--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/
 
I have found Remflex gaskets at O'Reilly's in the past if I couldn't wait
for Applied or Amazon. That was in San Jose, CA. Small towns may take more
time.

> I found that a Fel-pro gasket can be found locally. The fel-pro will
> work, if you have good mating surfaces. I have yet to find a box store that
> has the remflex locally in stock, and can get them quicker ordering from
> amazon(next day). Jim K I would guess would have some, and he might even
> have some there at Coos bay already.
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
Armand, we are missing you at GMCWS. We just finished a BBQ dinner at the
yurt. Grilled Tri-tip thin sliced on slider buns, green salad, baked beans,
and home made cookies. Sat outside in shirtsleeve weather, calm, no wind,
great company of about 200 of our GMC friends, good libations of course.
Great fun.
Jim Hupy
Salem, Or.
78 GMC ROYALE 403

> I have found Remflex gaskets at O'Reilly's in the past if I couldn't wait
> for Applied or Amazon. That was in San Jose, CA. Small towns may take more
> time.
>

>
> > I found that a Fel-pro gasket can be found locally. The fel-pro will
> > work, if you have good mating surfaces. I have yet to find a box store
> that
> > has the remflex locally in stock, and can get them quicker ordering from
> > amazon(next day). Jim K I would guess would have some, and he might
> even
> > have some there at Coos bay already.
> >
> >
> > --
> > Jon Roche
> > 75 palm beach
> > St. Cloud, MN
> > http://lqqkatjon.blogspot.com/
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
We sure wish we could be there. Would have been a lot more fun than
crawling around Manny's driveway.

> Armand, we are missing you at GMCWS. We just finished a BBQ dinner at the
> yurt. Grilled Tri-tip thin sliced on slider buns, green salad, baked beans,
> and home made cookies. Sat outside in shirtsleeve weather, calm, no wind,
> great company of about 200 of our GMC friends, good libations of course.
> Great fun.
> Jim Hupy
> Salem, Or.
> 78 GMC ROYALE 403

>
> > I have found Remflex gaskets at O'Reilly's in the past if I couldn't wait
> > for Applied or Amazon. That was in San Jose, CA. Small towns may take
> more
> > time.
> >

> >
> > > I found that a Fel-pro gasket can be found locally. The fel-pro will
> > > work, if you have good mating surfaces. I have yet to find a box store
> > that
> > > has the remflex locally in stock, and can get them quicker ordering
> from
> > > amazon(next day). Jim K I would guess would have some, and he might
> > even
> > > have some there at Coos bay already.
> > >
> > >
> > > --
> > > Jon Roche
> > > 75 palm beach
> > > St. Cloud, MN
> > > http://lqqkatjon.blogspot.com/
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> > >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
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