Home » Public Forums » GMCnet » Remflex gaskets
| Remflex gaskets [message #310483] |
Thu, 17 November 2016 14:48  |
Chris Tyler
Messages: 458
Registered: September 2013
Location: Odessa FL
Karma: 7
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Senior Member |
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I will be needing to replace the gaskets on my coach at some point. It has dougs headers on it and has a leak. Not sure what gaskets are on there now. Its not that bead yet but on the ever-expanding 'to do' list.
What I have found to work best on other applications is copper header gaskets with a thin film of cpper high temp silicone. Much talk on here about the Remflex gaskets has convinced me to try them. However the first oppertunity will be on a 340 Cuda Im reviving
I take it no coatings needed on the Remflex gaskets? Planning on using studs for the 340. Prob a combination of studs and bolts on the Olds. I remember som talk about not fully tightening the center bolt. Is that on headers, manifolds, or both?
If they work out I may use them on a chevy twin turbo engine I will be swapping out soon. It has canst iron turbo specific manifolds. Wondering if the Remflex is the best choice on those, given the heat and pressure.
Hopefully Matt C will chime in
76 Glenbrook
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| Re: [GMCnet] Remflex gaskets [message #310485 is a reply to message #310483] |
Thu, 17 November 2016 15:18  |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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I use them on the Motorhome and on a couple of other vehicles.
They are terrific!
Dolph Santorine
DE N8JPC
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
1-ton, Sullybuilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010,
> On Nov 17, 2016, at 3:48 PM, Chris Tyler wrote:
>
> I will be needing to replace the gaskets on my coach at some point. It has dougs headers on it and has a leak. Not sure what gaskets are on there now.
> Its not that bead yet but on the ever-expanding 'to do' list.
>
> What I have found to work best on other applications is copper header gaskets with a thin film of cpper high temp silicone. Much talk on here about
> the Remflex gaskets has convinced me to try them. However the first oppertunity will be on a 340 Cuda Im reviving
>
> I take it no coatings needed on the Remflex gaskets? Planning on using studs for the 340. Prob a combination of studs and bolts on the Olds. I
> remember som talk about not fully tightening the center bolt. Is that on headers, manifolds, or both?
>
> If they work out I may use them on a chevy twin turbo engine I will be swapping out soon. It has canst iron turbo specific manifolds. Wondering if the
> Remflex is the best choice on those, given the heat and pressure.
>
> Hopefully Matt C will chime in
> --
> 76 Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: Remflex gaskets [message #310488 is a reply to message #310483] |
Thu, 17 November 2016 16:13 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Well, here I am.
Flexible Graphite is one of my favorite gasket materials. As Remflex does it, it has a great deal of compliance (if you have non-flat surfaces, it has a sense of humor) and it has very low creep (when a material moves under load). But all that comes at a price of very little recovery and a fragile material. Most are coated to prevent handling damage. It does usually have enough recovery to manage normal thermal expansions and other expected movement. Another problem with graphite is that if you do develop a leak, it will just blow away along the leak path and it enlarge that path rapidly.
Embossed Solid Copper is another good gasket material. Evidence that it was used in many places before the market price went through the roof in the late 60's. Even with deep embossing, it will have trouble accommodating mating surfaces that a not at all flat. They do also have very low creep and limited recovery, but the durability of the material is much higher than that of graphite. If there is a lot of thermal movement, they can out perform a graphite part. If a small leak does develop, it will stay small for a long time.
Microseal does not matter much for an exhaust gasket, but a graphite gasket does very well there.
Copper gasket that don't need microseal need no coating. (This was why the Chrysler BB head gaskets had to be coated at assembly.) If you choose to coat it, an anti-seize is the best answer, but the anti-seize I would choose (Fel-Pro C5a) may not be available any longer and it does contain lead and will foul an O2 sensor. A nickel based anti-seize will do almost as well.
So, there it is in real terms for real situations. You still have to decide what you are going to do, but now you have some reason for your choice.
Be aware that when you are installing a graphite gasket made the Remflex does them, you will be crushing the material for several turns and the torque/angle will have a very slow rise for a number of turns. This is not true of most materials and surely not of an embossed copper part. I would expect those to come from contact to full tension (sort of like torque) in about a single turn. This requires that in either case, you pay attention to what you are doing. (If your phone rings, put the wrench down.)
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Remflex gaskets [message #310496 is a reply to message #310488] |
Thu, 17 November 2016 17:11 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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The comment on not tightening the center bolt refers to the OEM iron manifold. You can pull the top of the manifold towards the head and an exhaust leak can develop along the bottom edge of the manifold. You need the even pressure on the four center bolts to clamp the gasket correctly.
Reflex is your friend, done properly.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: Remflex gaskets [message #310497 is a reply to message #310483] |
Thu, 17 November 2016 17:11 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I used Remflex on my last 340 car (Duster) with good results. Note that I had both the manifolds and heads surfaced before assembly, I probably could of used copper with the same results. It was an automatic car, Mopar Performance advised saving the price of headers, they said the supplied manifolds would breathe as well up to 5K or so, which is about as fast as you want to spin the TorqueFlite anyway. They worked well, the little car went like stink - my first LA car.
Miguel fitted Remflex to the leaky side of my 26', I still have one on hand should the other side need it at some point in the future. He left the center bolt out and it seems to work fine.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Remflex gaskets [message #310511 is a reply to message #310483] |
Thu, 17 November 2016 19:17 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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I have Remflex gaskets on Thorley headers, and I installed them some years
ago. No leaks yet. The center bolt doesn't need to be structurally tight,
but I installed them on my coach. Headers are lighter than manifolds and
much more flexible under thermal load, so they tend to flex instead of
fighting back--one of their key advantages.
With cast manifolds, I would probably prefer copper gaskets--their chief
advantage is efficient thermal transfer so that the cylinder head and
manifold don't have a big jump in temperature at the gasket interface. I
think that's why they were originally installed without a gasket. But
that's not so much of a concern with headers.
With Remflex gaskets, follow the torquing instructions carefully (as Matt
cautions).
Rick "suspecting the graphite is a better thermal conductor that the old
crushable asbestos gaskets" Denney
On Thursday, November 17, 2016, Chris Tyler
wrote:
> I will be needing to replace the gaskets on my coach at some point. It has
> dougs headers on it and has a leak. Not sure what gaskets are on there now.
> Its not that bead yet but on the ever-expanding 'to do' list.
>
> What I have found to work best on other applications is copper header
> gaskets with a thin film of cpper high temp silicone. Much talk on here
> about
> the Remflex gaskets has convinced me to try them. However the first
> oppertunity will be on a 340 Cuda Im reviving
>
> I take it no coatings needed on the Remflex gaskets? Planning on using
> studs for the 340. Prob a combination of studs and bolts on the Olds. I
> remember som talk about not fully tightening the center bolt. Is that on
> headers, manifolds, or both?
>
> If they work out I may use them on a chevy twin turbo engine I will be
> swapping out soon. It has canst iron turbo specific manifolds. Wondering if
> the
> Remflex is the best choice on those, given the heat and pressure.
>
> Hopefully Matt C will chime in
> --
> 76 Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
'73 230 "Jaws"
Northern Virginia
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| Re: [GMCnet] Remflex gaskets [message #310559 is a reply to message #310511] |
Fri, 18 November 2016 11:51 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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There are two design when it comes to Copper gaskets.
The embossed ones work well on Manifolds, but does not work on Hedders as
the the ports are not precision so the embossed sect does not match the
opening majority of the time. We carry both as it gives you a choice.
On Thu, Nov 17, 2016 at 5:17 PM, Richard Denney wrote:
> I have Remflex gaskets on Thorley headers, and I installed them some years
> ago. No leaks yet. The center bolt doesn't need to be structurally tight,
> but I installed them on my coach. Headers are lighter than manifolds and
> much more flexible under thermal load, so they tend to flex instead of
> fighting back--one of their key advantages.
>
> With cast manifolds, I would probably prefer copper gaskets--their chief
> advantage is efficient thermal transfer so that the cylinder head and
> manifold don't have a big jump in temperature at the gasket interface. I
> think that's why they were originally installed without a gasket. But
> that's not so much of a concern with headers.
>
> With Remflex gaskets, follow the torquing instructions carefully (as Matt
> cautions).
>
> Rick "suspecting the graphite is a better thermal conductor that the old
> crushable asbestos gaskets" Denney
>
> On Thursday, November 17, 2016, Chris Tyler
> wrote:
>
>> I will be needing to replace the gaskets on my coach at some point. It
> has
>> dougs headers on it and has a leak. Not sure what gaskets are on there
> now.
>> Its not that bead yet but on the ever-expanding 'to do' list.
>>
>> What I have found to work best on other applications is copper header
>> gaskets with a thin film of cpper high temp silicone. Much talk on here
>> about
>> the Remflex gaskets has convinced me to try them. However the first
>> oppertunity will be on a 340 Cuda Im reviving
>>
>> I take it no coatings needed on the Remflex gaskets? Planning on using
>> studs for the 340. Prob a combination of studs and bolts on the Olds. I
>> remember som talk about not fully tightening the center bolt. Is that on
>> headers, manifolds, or both?
>>
>> If they work out I may use them on a chevy twin turbo engine I will be
>> swapping out soon. It has canst iron turbo specific manifolds. Wondering
> if
>> the
>> Remflex is the best choice on those, given the heat and pressure.
>>
>> Hopefully Matt C will chime in
>> --
>> 76 Glenbrook
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> '73 230 "Jaws"
> Northern Virginia
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
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] Remflex gaskets [message #310632 is a reply to message #310559] |
Sun, 20 November 2016 07:54 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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The key to using Remflex gaskets is to NOT over-torque them. They
state the torque specifications on the package. Naturally I had to
learn this one the hard way.
On Fri, Nov 18, 2016 at 11:51 AM, Jim Kanomata wrote:
> There are two design when it comes to Copper gaskets.
> The embossed ones work well on Manifolds, but does not work on Hedders as
> the the ports are not precision so the embossed sect does not match the
> opening majority of the time. We carry both as it gives you a choice.
>
>
> On Thu, Nov 17, 2016 at 5:17 PM, Richard Denney wrote:
>
>> I have Remflex gaskets on Thorley headers, and I installed them some years
>> ago. No leaks yet. The center bolt doesn't need to be structurally tight,
>> but I installed them on my coach. Headers are lighter than manifolds and
>> much more flexible under thermal load, so they tend to flex instead of
>> fighting back--one of their key advantages.
>>
>> With cast manifolds, I would probably prefer copper gaskets--their chief
>> advantage is efficient thermal transfer so that the cylinder head and
>> manifold don't have a big jump in temperature at the gasket interface. I
>> think that's why they were originally installed without a gasket. But
>> that's not so much of a concern with headers.
>>
>> With Remflex gaskets, follow the torquing instructions carefully (as Matt
>> cautions).
>>
>> Rick "suspecting the graphite is a better thermal conductor that the old
>> crushable asbestos gaskets" Denney
>>
>> On Thursday, November 17, 2016, Chris Tyler
>> wrote:
>>
>>> I will be needing to replace the gaskets on my coach at some point. It
>> has
>>> dougs headers on it and has a leak. Not sure what gaskets are on there
>> now.
>>> Its not that bead yet but on the ever-expanding 'to do' list.
>>>
>>> What I have found to work best on other applications is copper header
>>> gaskets with a thin film of cpper high temp silicone. Much talk on here
>>> about
>>> the Remflex gaskets has convinced me to try them. However the first
>>> oppertunity will be on a 340 Cuda Im reviving
>>>
>>> I take it no coatings needed on the Remflex gaskets? Planning on using
>>> studs for the 340. Prob a combination of studs and bolts on the Olds. I
>>> remember som talk about not fully tightening the center bolt. Is that on
>>> headers, manifolds, or both?
>>>
>>> If they work out I may use them on a chevy twin turbo engine I will be
>>> swapping out soon. It has canst iron turbo specific manifolds. Wondering
>> if
>>> the
>>> Remflex is the best choice on those, given the heat and pressure.
>>>
>>> Hopefully Matt C will chime in
>>> --
>>> 76 Glenbrook
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>> --
>> '73 230 "Jaws"
>> Northern Virginia
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
--
Ray Erspamer
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMCRoyale@gmail.com
414-484-9431
Web Site: http://ray-lisa.page.tl/
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GMCnet mailing list
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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