Exhaust nuts replacement
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Exhaust nuts replacement
Hey Guys,
I had difficulty removing the exhaust manifold nuts because they were caked with rust. After spraying WD40 on them for a week, they came off but were stripped. What types of replacement nuts should put back on. stainless steel? generic 10mm nuts?
Thanks to you guys for making an awesome forum!
Chazzle
I had difficulty removing the exhaust manifold nuts because they were caked with rust. After spraying WD40 on them for a week, they came off but were stripped. What types of replacement nuts should put back on. stainless steel? generic 10mm nuts?
Thanks to you guys for making an awesome forum!
Chazzle
- martynkim
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Re: Exhaust nuts replacement
I would use just a good hardened nut. Just hope you stud threads are still good.
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- fastplastic
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Re: Exhaust nuts replacement
there not a 10mm nut they are 6x1.0m
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- Spree
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Re: Exhaust nuts replacement
Find a nut that is a little thicker so you get more threads on it. Make sure your washer is big enough to cover the exhaust flange to get a good clamp on it. You can also double up on the nuts so they are more secure.
----
1986 NQ50d Spree Tiffany green/white - wifeys. Currently modding to get more *!
Early head, exhaust port, intake manifold, intake pod filter, 2.75 rear tire, pulley mod.
1986 NQ50d Spree Tiffany green/white - wifeys. Currently modding to get more *!
Early head, exhaust port, intake manifold, intake pod filter, 2.75 rear tire, pulley mod.
- SuprasNsprees
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Re: Exhaust nuts replacement
for future reference this stuff http://www.pbblaster.com/ is better than WD , imo
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'80 Puch Magnum MKII
'78 Maxi Newport. Polini 64cc case matched, hi comp head, Rito alum crank, delorto 21mm race, etc.
'78 PA50 Hobbit
'80 Puch Magnum MKII
'78 Maxi Newport. Polini 64cc case matched, hi comp head, Rito alum crank, delorto 21mm race, etc.
'78 PA50 Hobbit
Re: Exhaust nuts replacement
And a home made mixture of 50-50 of ATF and acetone will out preform PB Blaster any day of the week. I even have the test results to prove it and that is why I use it.SuprasNsprees wrote:for future reference this stuff http://www.pbblaster.com/ is better than WD , imo
Bear 45/70
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'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
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Re: Exhaust nuts replacement
My 2 cents....
GM rust penetrant and inhibitor heat valve lubricant #1052627 is amazing.
GM rust penetrant and inhibitor heat valve lubricant #1052627 is amazing.
2001 Honda Elite
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
Re: Exhaust nuts replacement
Various penetrating oils compared
Machinist's Workshop magazine actually tested penetrants for break out torque on rusted nuts. Significant results! They are below, as forwarded by an ex-student and professional machinist, Bud Baker.
*Don't forget the April 2007 "Machinist's Workshop" magazine comparison test.*
*They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment. *
Penetrating oil ....... Average load*
None ........................ 516 pounds
WD-40 ..................... 238 pounds
PB Blaster ............. 214 pounds
Liquid Wrench ..... 127 pounds
Kano Kroil .............106 pounds
ATF-Acetone mix..53 pounds
*The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic
transmission fluid and acetone.*
*Note the "home brew" was better than any commercial product in this one
particular test. Our local machinist group mixed up a batch and we all
now use it with equally good results. Note also that "Liquid Wrench" is
about as good as "Kroil" for about 20% of the price. *
*Your experience may vary, etc., etc.
Machinist's Workshop magazine actually tested penetrants for break out torque on rusted nuts. Significant results! They are below, as forwarded by an ex-student and professional machinist, Bud Baker.
*Don't forget the April 2007 "Machinist's Workshop" magazine comparison test.*
*They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment. *
Penetrating oil ....... Average load*
None ........................ 516 pounds
WD-40 ..................... 238 pounds
PB Blaster ............. 214 pounds
Liquid Wrench ..... 127 pounds
Kano Kroil .............106 pounds
ATF-Acetone mix..53 pounds
*The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic
transmission fluid and acetone.*
*Note the "home brew" was better than any commercial product in this one
particular test. Our local machinist group mixed up a batch and we all
now use it with equally good results. Note also that "Liquid Wrench" is
about as good as "Kroil" for about 20% of the price. *
*Your experience may vary, etc., etc.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
Re: Exhaust nuts replacement
I'll have to try the ATF/Acetone mix sometime. Do you just put it in a spray bottle then?
2001 Honda Elite
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
1995 Yamaha Jog
1994 Yamaha Axis
I can't believe
that cop put me
in the backseat
when I clearly
called shotgun.
Re: Exhaust nuts replacement
A buddy of mine who collects and restores old outboards asked my help with one of his new acquisitions. He had found a 1958 75 horse Mercury outboard (a dock buster) that needed to be torn down. Everything was frozen solid. Tried PB Blaster for 3 days and no joy. Three days of ATF/acetone and every d*** bolt, screw and nut came loose. Several engines later using the stuff and we use nothing else now.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
Re: Exhaust nuts replacement
wow, thanks guys! I will definitly not use the WD 40 anymore. I bought new nuts and doubled up on them to keep the flange secure. by changing the spark plug and baking the carbon out of the muffler, I gained easier starts and an extra 3-4 mph in speed!
Happy Scooting,
Chazzle
Happy Scooting,
Chazzle
Re: Exhaust nuts replacement
Congrats on fixing your rusty nuts. The additional conversation that ensued was informative.
I will continue to use WD-40, PB Blaster, Liquid Wrench until the current supply on the bench is gone.
Curiosity will eventually lead to trying the Acetone/ATF mixture. Good stuff, guys...... ...period
I will continue to use WD-40, PB Blaster, Liquid Wrench until the current supply on the bench is gone.
Curiosity will eventually lead to trying the Acetone/ATF mixture. Good stuff, guys...... ...period
RideRed
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"Live Large - Ride Small"
<Gyro S><MB5><Honda Navi><Helix><Sym Wolf><Yamaha Razz><Honda CH150 Deluxe>
"Live Large - Ride Small"
Re: Exhaust nuts replacement
Actually 6 mm threaded nuts are loosened and tightened with a 10 mm socket or wrench, but that does not make them a 10 mm nut.fastplastic wrote:there not a 10mm nut they are 6x1.0m
There are two theories of thought on exhaust nuts; soft (brass nuts) so the nut stripes and not the stud and hard (grade 8 steel nuts) so the nut will not strip, of course it can tear up a standard grade stud. I have always found the stainless steel studs and nuts work best. They don't corrode or rust so the problem does not exist.
Bear 45/70
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
'83 Aero 80 X 3
'84 Aero 80 X 3
'85 Aero 80
'84 Aero 125 X 2
'84 Aero 125
'84 Aero 125 X 2
'85 Aero 50
'85 Spree
- fastplastic
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Re: Exhaust nuts replacement
i know why studs are used and i know they are the correct way to go but on my scooter motors (and only scooter motors) i use socket head cap screws (allen head bolts ) and had great success.....