Home » Public Forums » GMCnet » [GMCnet] exhaust gaskets?
| [GMCnet] exhaust gaskets? [message #148143] |
Sat, 29 October 2011 12:44  |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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Looks like I get to replace the exhaust manifold gaskets as both are leaking
along the top edge of the manifolds. Engine was rebuilt by PO about 9K miles
ago, so hopefully it's not too horrible getting the bolts out... Maybe I'll even
luck out and be able to just re-torque (nah, that never happens...)
So what's the current wisdom on gaskets? Solid copper, Permatex, and/or Remflex?
I didn't find reference to Remflex in Gene's excellent website, but have
seen it mentioned here on the forum.
Looks like Dave Lenzi's copper gaskets come as a pair for around $60.
Are the remflex sold singly, or in pairs? Can't tell from the pictures if that's one
gasket or two in the package. It's about $30/per package, so if I have to buy two,
it's a wash vs copper price-wise.
thanks,
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] exhaust gaskets? [message #148148 is a reply to message #148144] |
Sat, 29 October 2011 13:51  |
Gary Worobec
Messages: 867
Registered: May 2005
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If the manifolds have been surfaced then copper makes sense but for old
manifolds you can;t beat Remflex. I've had them for a bout 15,000 miles with
no issues.
Thanks
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
----- Original Message -----
From: "Bruce Hislop" <bruce@perthcomm.com>
To: <gmclist@temp.gmcnet.org>
Sent: Saturday, October 29, 2011 11:01 AM
Subject: Re: [GMCnet] exhaust gaskets?
>
>
> I put reflex's on before Dick P rebuilt my 455. They come as a pair in
> the package. They really worked well as far as sealing the leaks, but I
> only had them on for about 2500 miles before the engine went so I can't
> speak for longevity. Be sure to read the instructions about torquing
> them.
>
> After the rebuild and every was planned flat again, I put Dave Lenzi's
> copper gaskets in. I like the copper for its heat transfer, keeps the
> manifolds cooler and maybe they won't crack. Originally the manifolds
> were installed without gaskets.
>
>
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
> Hubler 1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] exhaust gaskets? [message #148149 is a reply to message #148148] |
Sat, 29 October 2011 13:53 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Do you know if they are recommended for headers?
Dolph
On Oct 29, 2011, at 2:51 PM, Gary Worobec wrote:
> If the manifolds have been surfaced then copper makes sense but for old
> manifolds you can;t beat Remflex. I've had them for a bout 15,000 miles with
> no issues.
>
> Thanks
>
> Gary and Joanne Worobec
> 1973 GMC Glacier
> Anza, CA
>
>
> ----- Original Message -----
> From: "Bruce Hislop" <bruce@perthcomm.com>
> To: <gmclist@temp.gmcnet.org>
> Sent: Saturday, October 29, 2011 11:01 AM
> Subject: Re: [GMCnet] exhaust gaskets?
>
>
>>
>>
>> I put reflex's on before Dick P rebuilt my 455. They come as a pair in
>> the package. They really worked well as far as sealing the leaks, but I
>> only had them on for about 2500 miles before the engine went so I can't
>> speak for longevity. Be sure to read the instructions about torquing
>> them.
>>
>> After the rebuild and every was planned flat again, I put Dave Lenzi's
>> copper gaskets in. I like the copper for its heat transfer, keeps the
>> manifolds cooler and maybe they won't crack. Originally the manifolds
>> were installed without gaskets.
>>
>>
>>
>> --
>> Bruce Hislop
>> ON Canada
>> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
>> Hubler 1 ton front end
>> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
>> My Staff says I never listen to them, or something like that
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
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| Re: [GMCnet] exhaust gaskets? [message #148151 is a reply to message #148149] |
Sat, 29 October 2011 16:20 |
jayrabe
Messages: 509
Registered: June 2009
Location: Portland, OR
Karma: 0
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I put Remflex on my 76 PB 455 w/ headers. Worked great. About 6mo after buying my baby, I noticed the exhaust was leaking. Took it in to a regular shop here in Portland, and $400 later had new gaskets. Don't know what kind they used, though it was a kind (like Remflex) that didn't use or at least they didn't use any sealant, but after another couple of 1000 mi they were leaking again. I went back to them, but they weren't interested in re-doing them under any warranty, saying they'd noted on the shop ticket that there appeared to be some warpage, and apparently they weren't interested in any future business from me, so with the encouragement from the list I decided to do the job myself. Mind you, I are not a mechanic, and changing these header gaskets was the most mechanical project I've ever done since working on lawnmower engines in HS. But the Remflex were easy and straightforward and all went well and they're still holding.
:-)
Jay Rabe
767 PB
Portland, OR
> From: dolph@dolphsantorine.com
> Date: Sat, 29 Oct 2011 14:53:05 -0400
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] exhaust gaskets?
>
> Do you know if they are recommended for headers?
>
> Dolph
>
>
>
> On Oct 29, 2011, at 2:51 PM, Gary Worobec wrote:
>
> > If the manifolds have been surfaced then copper makes sense but for old
> > manifolds you can;t beat Remflex. I've had them for a bout 15,000 miles with
> > no issues.
> >
> > Thanks
> >
> > Gary and Joanne Worobec
> > 1973 GMC Glacier
> > Anza, CA
> >
> >
> > ----- Original Message -----
> > From: "Bruce Hislop" <bruce@perthcomm.com>
> > To: <gmclist@temp.gmcnet.org>
> > Sent: Saturday, October 29, 2011 11:01 AM
> > Subject: Re: [GMCnet] exhaust gaskets?
> >
> >
> >>
> >>
> >> I put reflex's on before Dick P rebuilt my 455. They come as a pair in
> >> the package. They really worked well as far as sealing the leaks, but I
> >> only had them on for about 2500 miles before the engine went so I can't
> >> speak for longevity. Be sure to read the instructions about torquing
> >> them.
> >>
> >> After the rebuild and every was planned flat again, I put Dave Lenzi's
> >> copper gaskets in. I like the copper for its heat transfer, keeps the
> >> manifolds cooler and maybe they won't crack. Originally the manifolds
> >> were installed without gaskets.
> >>
> >>
> >>
> >> --
> >> Bruce Hislop
> >> ON Canada
> >> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
> >> Hubler 1 ton front end
> >> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> >> My Staff says I never listen to them, or something like that
> >> _______________________________________________
> >> GMCnet mailing list
> >> Unsubscribe or Change List Options:
> >> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
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| Re: [GMCnet] exhaust gaskets? [message #148152 is a reply to message #148151] |
Sat, 29 October 2011 16:51 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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Jay:
Thanks! I'm a pretty decent wrench, but as I age, I've developed a hangup about doing it right the first time.
I'm going to be spending an entire day under the coach (fuel pump, front end, brakes, final drive), and thought I may as well toss some gaskets into the mix.
Dolph
On Oct 29, 2011, at 5:20 PM, Jay Rabe wrote:
>
> I put Remflex on my 76 PB 455 w/ headers. Worked great. About 6mo after buying my baby, I noticed the exhaust was leaking. Took it in to a regular shop here in Portland, and $400 later had new gaskets. Don't know what kind they used, though it was a kind (like Remflex) that didn't use or at least they didn't use any sealant, but after another couple of 1000 mi they were leaking again. I went back to them, but they weren't interested in re-doing them under any warranty, saying they'd noted on the shop ticket that there appeared to be some warpage, and apparently they weren't interested in any future business from me, so with the encouragement from the list I decided to do the job myself. Mind you, I are not a mechanic, and changing these header gaskets was the most mechanical project I've ever done since working on lawnmower engines in HS. But the Remflex were easy and straightforward and all went well and they're still holding.
>
> :-)
>
> Jay Rabe
> 767 PB
> Portland, OR
>
>> From: dolph@dolphsantorine.com
>> Date: Sat, 29 Oct 2011 14:53:05 -0400
>> To: gmclist@temp.gmcnet.org
>> Subject: Re: [GMCnet] exhaust gaskets?
>>
>> Do you know if they are recommended for headers?
>>
>> Dolph
>>
>>
>>
>> On Oct 29, 2011, at 2:51 PM, Gary Worobec wrote:
>>
>>> If the manifolds have been surfaced then copper makes sense but for old
>>> manifolds you can;t beat Remflex. I've had them for a bout 15,000 miles with
>>> no issues.
>>>
>>> Thanks
>>>
>>> Gary and Joanne Worobec
>>> 1973 GMC Glacier
>>> Anza, CA
>>>
>>>
>>> ----- Original Message -----
>>> From: "Bruce Hislop" <bruce@perthcomm.com>
>>> To: <gmclist@temp.gmcnet.org>
>>> Sent: Saturday, October 29, 2011 11:01 AM
>>> Subject: Re: [GMCnet] exhaust gaskets?
>>>
>>>
>>>>
>>>>
>>>> I put reflex's on before Dick P rebuilt my 455. They come as a pair in
>>>> the package. They really worked well as far as sealing the leaks, but I
>>>> only had them on for about 2500 miles before the engine went so I can't
>>>> speak for longevity. Be sure to read the instructions about torquing
>>>> them.
>>>>
>>>> After the rebuild and every was planned flat again, I put Dave Lenzi's
>>>> copper gaskets in. I like the copper for its heat transfer, keeps the
>>>> manifolds cooler and maybe they won't crack. Originally the manifolds
>>>> were installed without gaskets.
>>>>
>>>>
>>>>
>>>> --
>>>> Bruce Hislop
>>>> ON Canada
>>>> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
>>>> Hubler 1 ton front end
>>>> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
>>>> My Staff says I never listen to them, or something like that
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
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| Re: [GMCnet] exhaust gaskets? [message #148153 is a reply to message #148143] |
Sat, 29 October 2011 17:25 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Jim must be busy.
http://www.appliedgmc.com/prod.itml/icOid/670
| KB wrote on Sat, 29 October 2011 13:44 |
Looks like I get to replace the exhaust manifold gaskets as both are leaking
along the top edge of the manifolds. Engine was rebuilt by PO about 9K miles
ago, so hopefully it's not too horrible getting the bolts out... Maybe I'll even
luck out and be able to just re-torque (nah, that never happens...)
So what's the current wisdom on gaskets? Solid copper, Permatex, and/or Remflex?
I didn't find reference to Remflex in Gene's excellent website, but have
seen it mentioned here on the forum.
Looks like Dave Lenzi's copper gaskets come as a pair for around $60.
Are the remflex sold singly, or in pairs? Can't tell from the pictures if that's one
gasket or two in the package. It's about $30/per package, so if I have to buy two,
it's a wash vs copper price-wise.
thanks,
Karen
1973 23'
1975 26'
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C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] exhaust gaskets? [message #148156 is a reply to message #148143] |
Sat, 29 October 2011 18:01 |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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Senior Member |
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Thanks all for the advice. I'm very happy to report that I was able
to get all 10 bolts loosened without incident. I'm sure it's because
they were just put on 9k miles ago or so -- nothing else has been
that easy to undo on this coach and I was prepared for a lengthy struggle.
Maybe they were just too loose to seal well. Some of the bolts are pretty
old and rusty and I don't see evidence of anti-seize, so I'll at least
remedy that.
thanks,
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] exhaust gaskets? [message #148181 is a reply to message #148156] |
Sat, 29 October 2011 21:13 |
armandminnie
Messages: 864
Registered: May 2009
Location: Marana, AZ
Karma: 2
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Senior Member |
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I had lots of leaks until I put the Remflex gasket on the driver's side (other side still has the copper gaskets in and not leaking). I torqued the bolts like the Remflex instructions say (pretty low torque) and used anti-seize so I used the tin bolt locks from Applied GMC so the bolts won't loosen. Have about 8K miles since and still no leaks.
Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
visit my gmc blog
click here to visit gmcws.org
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| Re: [GMCnet] exhaust gaskets? [message #148185 is a reply to message #148143] |
Sat, 29 October 2011 22:20 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Karen,
I have not promoted the Remflex as I have not personally put on 40-60K miles.
I have received feedback from several that they have been surviving high milage.
I am now comfortable selling the along with the Lenzi copper and
others we carry.
I feel the secret for a long life is to retorque them after first
1,000 miles and make sure that the bolts are not backing off.
Remflex has an excelllent warrenty. Our shipping guys broke them, so I
sent it back to the warehouse and received a new set n/c the following
day.
On Sat, Oct 29, 2011 at 10:44 AM, KB <kab7@sonic.net> wrote:
> Looks like I get to replace the exhaust manifold gaskets as both are leaking
> along the top edge of the manifolds. Engine was rebuilt by PO about 9K miles
> ago, so hopefully it's not too horrible getting the bolts out... Maybe I'll even
> luck out and be able to just re-torque (nah, that never happens...)
>
> So what's the current wisdom on gaskets? Solid copper, Permatex, and/or Remflex?
> I didn't find reference to Remflex in Gene's excellent website, but have
> seen it mentioned here on the forum.
>
> Looks like Dave Lenzi's copper gaskets come as a pair for around $60.
>
> Are the remflex sold singly, or in pairs? Can't tell from the pictures if that's one
> gasket or two in the package. It's about $30/per package, so if I have to buy two,
> it's a wash vs copper price-wise.
>
> thanks,
> Karen
> 1973 23'
> 1975 26'
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Exhaust Gasket [message #216128 is a reply to message #216116] |
Mon, 29 July 2013 14:40 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Tom,
The Remflex gaskets that Jim K sells are very good to fix the exhaust leak at the manifold.
http://www.appliedgmc.com/prod.itml/icOid/670
These can be ordered for both header and manifold applications.
The copper gaskets by Lenzi are for manifolds application only
http://www.appliedgmc.com/prod.itml/icOid/834
You manifolds mating facing must be in good condition along with the head facing area.
If you have headers and want copper then I have been told that these work with the headers.
http://www.summitracing.com/parts/mrg-7170
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
On Jul 29, 2013, at 1:50 PM, Howard <hnielsen2@cox.net> wrote:
> Get the set of gaskets from Jim K.
> Howard
> Alpine Ca
>
> All is well with my Lord
>
> On Jul 29, 2013, at 10:46 AM, tom geiger <tgeiger@burnsmcd.com> wrote:
>
>>
>>
>> Ok, was driving the old girl the other week and starting noticing a little lifter sound so I'm back at doing the exhaust gasket again, third time over 10 years. I'm wondering what would take care of this once and for all. I've good things about the copper gaskets and then I've also read about what Jim K has for this. Which way to go guys....my goal hopfully if I do this right is not to have to deal with it anymore, or at least for awhile.
>>
>> Tom
>> 76 Eleganza II
>> Kansas City, Mo
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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