Exhaust Nuts
- hambone
- Post-Industrial Non-Secular Mennonite
- Location: Portland, Ore.
- Status: Offline
Exhaust Nuts
Yes I am.
Hoover goes off on his soapbox about only using brass/bronze nuts on exhaust studs. I have a German kit that does have such nuts, but they are for the clamps. Steel nuts have been provided for bolting up the exhaust. Is this OK?
Hoover goes off on his soapbox about only using brass/bronze nuts on exhaust studs. I have a German kit that does have such nuts, but they are for the clamps. Steel nuts have been provided for bolting up the exhaust. Is this OK?
http://greencascadia.blogspot.com
http://pdxvolksfolks.blogspot.com
it balances on your head just like a mattress balances on a bottle of wine
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http://pdxvolksfolks.blogspot.com
it balances on your head just like a mattress balances on a bottle of wine
your brand new leopard skin pillbox hat
- hambone
- Post-Industrial Non-Secular Mennonite
- Location: Portland, Ore.
- Status: Offline
Antiseize and nonsteel? OR with steel nuts?
http://greencascadia.blogspot.com
http://pdxvolksfolks.blogspot.com
it balances on your head just like a mattress balances on a bottle of wine
your brand new leopard skin pillbox hat
http://pdxvolksfolks.blogspot.com
it balances on your head just like a mattress balances on a bottle of wine
your brand new leopard skin pillbox hat
- hambone
- Post-Industrial Non-Secular Mennonite
- Location: Portland, Ore.
- Status: Offline
I figured as much, but then ol Hoover comes outa left field. Well in an airplane I can see using the best available. Unless I drive off the road up in the mountains.
http://greencascadia.blogspot.com
http://pdxvolksfolks.blogspot.com
it balances on your head just like a mattress balances on a bottle of wine
your brand new leopard skin pillbox hat
http://pdxvolksfolks.blogspot.com
it balances on your head just like a mattress balances on a bottle of wine
your brand new leopard skin pillbox hat
- Amskeptic
- IAC "Help Desk"
- Status: Offline
I use copper on all exhaust, PARTICULARLY the exhaust manifolds.hambone wrote:I figured as much, but then ol Hoover comes outa left field. Well in an airplane I can see using the best available. Unless I drive off the road up in the mountains.
You want the nuts to be the weak link when it comes time to take the nuts off. If you have a steel nut that has married itself to the exhaust stud, you run the risk of snapping the stud when it comes time to take apart, but worse yet for airplanes, you run the risk of weakening the stud with no visible evidence of having done so. Copper you can destroy if neccessary and keep the stud intact. If I have any hot application fastener that is not an accessible bolt and nut, such as head studs and Type 4 muffler studs, guess what? Copper, baby. With copper anti-seize.
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
-
- IAC Addict!
- Location: Metro Detroit
- Status: Offline
Thought I'd build on this thread. My nuts keep coming loose. They aren't stripped. I've gotten underneath the bus 4 or 5 since the install, and everytime they are loose.... yes, am using a torque wrench set at 17lbs.
What should I use? lock washer? loc-tite?
What should I use? lock washer? loc-tite?
1976 VW Bus aka tripod
FI ...not leaky, and not so noisy...and she runs awesome!
FI ...not leaky, and not so noisy...and she runs awesome!
hambone wrote: There are those out there with no other aim but to bunch panties. It's like arguing with a pretzel.
- Amskeptic
- IAC "Help Desk"
- Status: Offline
The nuts themselves are not loosening. The studs are simply pulling straight out of the head.TrollFromDownBelow wrote:Thought I'd build on this thread. My nuts keep coming loose. They aren't stripped. I've gotten underneath the bus 4 or 5 since the install, and everytime they are loose.... yes, am using a torque wrench set at 17lbs.
What should I use? lock washer? loc-tite?
17 ft/lbs, by the way, is too tight. 16 is spec, and I refuse to go beyond 15 myself.
Your first option is to tap for 9mm hole and install 9X8 step studs.
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
- Gypsie
- rusty aircooled mekanich
- Location: Treadin' Lightly under the Clear Blue!
- Status: Offline
If you want to test the theory mark the nut and the flange (a simple score line will do). I believe you'll find that the nut has not turned and yet it is still loose.Amskeptic wrote: The nuts themselves are not loosening. The studs are simply pulling straight out of the head.
Aluminium/steel/high torque (considering the size of the hole)/and heat often don't play nice together.
=D>Amskeptic wrote: Your first option is to tap for 9mm hole and install 9X8 step studs.
Colin
So it all started when I wanted to get better gas mileage....
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- IAC Addict!
- Location: Metro Detroit
- Status: Offline
I'll retorque ... haven't fired it up since I retightened. IRR, I believe we already put step studs in last time you were here.
1976 VW Bus aka tripod
FI ...not leaky, and not so noisy...and she runs awesome!
FI ...not leaky, and not so noisy...and she runs awesome!
hambone wrote: There are those out there with no other aim but to bunch panties. It's like arguing with a pretzel.
- Amskeptic
- IAC "Help Desk"
- Status: Offline
Timesert City is your next stop. We had step studs?TrollFromDownBelow wrote:I'll retorque ... haven't fired it up since I retightened. IRR, I believe we already put step studs in last time you were here.
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
-
- IAC Addict!
- Location: Metro Detroit
- Status: Offline
I had ordered new studs, and remember the conversation. I'm going to paint a thin line with white-out as suggested to see which is moving. Believe I bought the nuts at the local hardware store... metalurgy could be that they are expanding much faster than the stud, and loosening up...at least that's what I'm hoping
The fact is ALL of the nuts are loose...have a hard time believing all of the studs are pulling out.
The fact is ALL of the nuts are loose...have a hard time believing all of the studs are pulling out.
1976 VW Bus aka tripod
FI ...not leaky, and not so noisy...and she runs awesome!
FI ...not leaky, and not so noisy...and she runs awesome!
hambone wrote: There are those out there with no other aim but to bunch panties. It's like arguing with a pretzel.
-
- IAC Addict!
- Location: Metro Detroit
- Status: Offline
just thought i'd follow up on my little experiment....painted white out on the studs/nuts. Nuts didn't move...AND everything is still tight after several hundred miles..woohoo! I'm guessing everything finally settled.
1976 VW Bus aka tripod
FI ...not leaky, and not so noisy...and she runs awesome!
FI ...not leaky, and not so noisy...and she runs awesome!
hambone wrote: There are those out there with no other aim but to bunch panties. It's like arguing with a pretzel.