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AirMike
Joined: 27 Feb 2007
Posts: 514
Location: Nevada
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 Posted: Sun Mar 22, 2009 9:32 am Post subject: Exhaust system torque values - etc - Vetterman 2 stack |
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The info is pretty slim on the installation of the Vetterman dual stack system.
Vans plans say to torque the exhaust nuts to 100-140 in/lbs
Vetterman's sheet says to torque the nuts to 140-180 in/lbs
Any idea which is preferred?????
Also Vans says to use anti-seize on the nuts. Any suggestions for what this product is ..........???????
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Jim Berry
Joined: 10 Jan 2006
Posts: 237
Location: Denver
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| Posted: Sun Mar 22, 2009 2:07 pm Post subject: Re: Exhaust system torque values - etc - Vetterman 2 stack |
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Antiseize keeps the nuts from becoming permanently corroded to the exhaust studs. Look at Permatex 133A and similar products.
Jim Berry
40482
N15JB
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Sun Mar 22, 2009 4:05 pm Post subject: Exhaust system torque values - etc - Vetterman 2 stack |
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Two Loctite products that we use are C5-A which is Loctite #51005, Copper based Anti-Seize Lubricant (good to 980 C / 1800F) and then for our turbine hot sections we resort to overkill with Loctite #51102, Nickel Anti-Seize (good to 1315C / 2400F). If you like to look for cheaper Milspec alternatives it is MIL-PRF-907-E.
It is always a good call to use nuts rated to the additional heat of a head flange or collector attachment. I vote for the second and higher torques listed cause I seem to remember a hardware improvement over stock configuration.
John Cox
Do not Archive
From: owner-rv10-list-server(at)matronics.com on behalf of Jim Berry
Sent: Sun 3/22/2009 3:07 PM
To: rv10-list(at)matronics.com
Subject: Re: Exhaust system torque values - etc - Vetterman 2 stack
--> RV10-List message posted by: "Jim Berry" <jimberry(at)qwest.net>
Antiseize keeps the nuts from becoming permanently corroded to the exhaust studs. Look at Permatex 133A and similar products.
Jim Berry
40482
N15JB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=235712#235712
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AirMike
Joined: 27 Feb 2007
Posts: 514
Location: Nevada
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| Posted: Tue Mar 24, 2009 8:41 am Post subject: Exhaust system torque values - etc - Vetterman 2 stack |
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Larry at Vetterman informed me that the bolt that he supplies with the exhaust kit are stainless steel and have a higher torque value than the Vans bolts. He said torque to about 150# is fine. With the SS bolts he said the anti seize is not needed
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