need high temp gasket for furnace - ideas? - Fiberglass RV


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Old 01-27-2014, 11:16 PM   #1
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need high temp gasket for furnace - ideas?

Howdy!
I have an old gravity feed furnace in my scamp, and there is a gasket that goes between the 3"x3" plate/flat area in the pic, and the upright burner section. Once they are mated.
The old one is almost gone, leaving gaps to the burner that make me nervous, but it looks like a woven fiberglass cloth or something.

Can anyone think of a high temp DIY gasket material that would seal it up and be appropriate in that environment? Thanks!
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Old 01-28-2014, 07:47 AM   #2
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Most any real hardware or automotive shop sells gasket material by the sheet (like a piece of paper) that you cut with scissors to form whatever shape gasket you need. Xacto knife is good too.

Charlie Y
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Old 01-28-2014, 08:52 AM   #3
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In that era the gasket was probably asbestos, so handle it appropriately. I agree with tractors1 there are other sources of replacement materials. An other area to look is in the heating / boilers industry. The dental lab and jewelery industries may have replacements for asbestos once used as ring liners for investing their castings.
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Old 01-28-2014, 09:23 AM   #4
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It would help if you had the make and model of your heater.

Suburban 071084 Firewall Gasket Furnace Parts camper RV | eBay
Here is one such kit available

http://www.ebay.com/itm/Suburban-070...54eafd&vxp=mtr
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Old 01-28-2014, 09:43 AM   #5
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Gasket Material

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Originally Posted by tractors1 View Post
Most any real hardware or automotive shop sells gasket material by the sheet (like a piece of paper) that you cut with scissors to form whatever shape gasket you need. Xacto knife is good too.

Charlie Y
Most gasket material offered by Hardware and autosupply shops IS NOT suitable for furnace applications. If you get the wrong stuff all you risk is your life when it leaks.

If you can't get a factory replacement gasket, try an HVAC shop and beg off a small piece, better yet, have them make the gasket for you.
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Old 01-28-2014, 11:01 AM   #6
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Old 01-28-2014, 01:25 PM   #7
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Most gasket material offered by Hardware and autosupply shops IS NOT suitable for furnace applications. If you get the wrong stuff all you risk is your life when it leaks.
.
A good heads up Bob. Using a 40 year old gravity only feed furnace is for many here to big of risk to start with.
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Old 01-28-2014, 04:09 PM   #8
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Since you have it apart Bob, do a good inspection of the fire box, and exhaust vent. Look for excessive rust. If it looks like there is a chance of it rusting though, anywhere, then I would salvage the gas valve, if it works, and toss the rest of it.

There are those that consider the life of a furnace to be in 25 year range. That may be true for a home furnace that gets used daily. On the other hand, I have seen 40 year old gravity furnaces in trailers that look like they have never been used.

Due diligence.

Just out of curiosity, what is the model of your furnace?
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Old 01-28-2014, 05:24 PM   #9
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Have you tried a place that sells wood stoves
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Old 01-28-2014, 07:05 PM   #10
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40 y.o. Furnace

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A good heads up Bob. Using a 40 year old gravity only feed furnace is for many here to big of risk to start with.

I concurr. In many climates just air exposure for that long will start damage inside the firebox. Unless someone was already a "Qualified & Experienced" furnace repair person, I would, at the very least, have said type person check it out before use.

Or, at the very least, be sure that all of the life insurance policies were paid up.
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Old 01-29-2014, 10:43 AM   #11
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need high temp gasket for furnace - ideas?

Sheesh, I just need a gasket people. I am thankful for the help, but recommending life insurance?
The furnace works well and I have inspected for any rust or whatnot. Yes, a bitchin new furnace would be nice but sometimes we have to make due.

And thanks all for the ideas one of them should surely work especially that eBay link.
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Old 01-29-2014, 11:03 AM   #12
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Sheesh, I just need a gasket people. I am thankful for the help, but recommending life insurance?
The furnace works well and I have inspected for any rust or whatnot. Yes, a bitchin new furnace would be nice but sometimes we have to make due.

And thanks all for the ideas one of them should surely work especially that eBay link.
Keep in mind that the posts made here remain available to anyone to search through and find information. Not all newish members or those new to our older trailers are as knowledgeable as you as to the risks of choosing to use an older gravity feed furnace or are aware as you as to the extra precautions they need to take should they choose to continue to use one. There is after all a very valid reason for why they are no longer made and why a professional with a licence to do repairs on propane appliances will not touch it. Would hate to have anyone here have a serious accident as a result of having read here it was all OK to do.
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Old 01-29-2014, 11:30 AM   #13
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Second the Motion

Quote:
Originally Posted by Carol H View Post
Keep in mind that the posts made here remain available to anyone to search through and find information. Not all newish members or those new to our older trailers are as knowledgeable as you as to the risks of choosing to use an older gravity feed furnace or are aware as you as to the extra precautions they need to take should they choose to continue to use one. There is after all a very valid reason for why they are no longer made and why a professional with a licence to do repairs on propane appliances will not touch it. Would hate to have anyone here have a serious accident as a result of having read here it was all OK to do.
Thank You Carol, you beat me to making the very same reply.....
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Old 01-29-2014, 01:04 PM   #14
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Quote:
Originally Posted by Bob Miller View Post
I concurr. In many climates just air exposure for that long will start damage inside the firebox. Unless someone was already a "Qualified & Experienced" furnace repair person, I would, at the very least, have said type person check it out before use.

Or, at the very least, be sure that all of the life insurance policies were paid up.
Oh Bob, could you please site evidence of your claims? A galvanized box which has not seen heat would seem unlikely to corrode, in any climate. Unless of course if it were left out doors, which is probably not the case here.

Do you think the integrity of a metal box requires the skills of a "Qualified & Experienced" furnace repair person? Really? What value do you think that would add? Please remember that part of the beauty of a gravity furnace is it's simplicity. It is just a metal box with a fire in it. Which, (and this is the important part) is vented to the outside. Other options such as Mr Heater, or catalytic heaters don't have that feature, yet people sleep with them on.

Since gravity furnaces are not available for trailers anymore, restoring the existing ones is the only option for people who like the quiet, simple heat that requires no power. It should be noted that they are available for domestic use though. The design is almost exactly the same as these 40 year old units. This leads me to believe that it is not safety concerns that made them unavailable.

Why are you trying to scare people? Life insurance? Come on! Is this just a rationalization of your decision to replace all the appliances in your unit? Was that based on research, or fear? You site resale value, (in another thread) but you argue safety. There are possibly thousands of these furnace types in operation. I am sure that if people were dying from their use, you could site examples. So if you have anything to offer, other then your vague fears, then please do.
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