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Ray White
Joined: 02 Dec 2014
Posts: 6316
Location: Derby
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 Posted: Fri Aug 20, 2021 5:45 pm Post subject: exhaust jointing paste. |
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For me, the trouble with this heat resistant jointing paste is that it cures so quickly. I want to use it on a manifold which takes time to assemble and I have found the compound "goes off" before I can finish tightening it down.
Anyone know what - if anything - can be done to extend the working time? For example, can a little water be used? |
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ukdave2002
Joined: 23 Nov 2007
Posts: 4105
Location: South Cheshire
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| Posted: Fri Aug 20, 2021 8:30 pm Post subject: |
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Hi Ray, are you using assembly or repair paste? The stuff I have used requires the heat from the exhaust to cure.
One other thing, these compounds tend to cure quicker when the tube or container has been Previously opened.
Dave |
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Ray White
Joined: 02 Dec 2014
Posts: 6316
Location: Derby
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| Posted: Fri Aug 20, 2021 9:20 pm Post subject: |
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Hi Dave. I am using something called exhaust jointing paste by Klarius. I normally use Holts but this was all they had at the Motor factors today.
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Crashbox
Joined: 30 Apr 2021
Posts: 139
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| Posted: Fri Aug 20, 2021 11:34 pm Post subject: |
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I use copper grease rather than exhaust paste.
_________________
1989 2CV
1932 Morris Minor S.V. Two-Seater |
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Ray White
Joined: 02 Dec 2014
Posts: 6316
Location: Derby
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| Posted: Sat Aug 21, 2021 7:56 am Post subject: |
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| Crashbox wrote: | | I use copper grease rather than exhaust paste. |
I wonder if anyone else here uses copper grease. ?
The grease will burn off leaving a coating of copper which I presume will form a seal. It will also come apart easily.
The surfaces are good so I might not need anything? |
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ukdave2002
Joined: 23 Nov 2007
Posts: 4105
Location: South Cheshire
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| Posted: Sun Aug 22, 2021 1:31 pm Post subject: |
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| Ray White wrote: | | The grease will burn off leaving a coating of copper which I presume will form a seal. It will also come apart easily. |
Copper grease is designed to work at high temperatures so I doubt it will burn off as you describe, it will lubricate the parts so that they pull together more easily, looking at my tub of copper grease this morning, it lists exhaust assembly as one of its uses 
Dave |
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Peter_L
Joined: 10 Apr 2008
Posts: 2680
Location: New Brunswick. Canada.
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| Posted: Sun Aug 22, 2021 3:30 pm Post subject: |
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| ukdave2002 wrote: | | Ray White wrote: | | The grease will burn off leaving a coating of copper which I presume will form a seal. It will also come apart easily. |
Copper grease is designed to work at high temperatures so I doubt it will burn off as you describe, it will lubricate the parts so that they pull together more easily, looking at my tub of copper grease this morning, it lists exhaust assembly as one of its uses
Dave |
I used Copper Grease on quite few manifolds, never had a problem, also brass nuts where possible. But "back in the day" it seems that cylinder heads came off at regular intervals. One of my recent "moderns" did 160K Miles with the head being just as Chrysler made it. |
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Ray White
Joined: 02 Dec 2014
Posts: 6316
Location: Derby
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| Posted: Sun Aug 22, 2021 4:38 pm Post subject: |
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| Thanks guys. I am now more confident that there should be no problem with it. |
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