LCGB Forums

The ability to post messages is restricted to LCGB members. Any questions contact us at lcgbadmin@googlemail.com

Exhaust nuts

Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models

Exhaust nuts

Postby Tim_Craig » Mon Jul 28, 2014 11:07 pm

Looking for opinions on which are the best exhaust manifold nuts to use.
I picked up some copper plated exhaust lock nuts on the Euro rally to Switzerland which seemed to work really well, got a few spares as well, lol.
I have however, been told they are crap & brass are better, what are the pros & cons then?

Thanks for any info you can give. Cheers Tim.
Tim_Craig
 
Posts: 67
Joined: Tue Jun 03, 2014 7:38 am

Re: Exhaust nuts

Postby lammydave » Tue Jul 29, 2014 6:56 am

the exhaust nuts are brass for a reason...

it's my understanding that because they are brass, they dont corrode or bond to the stud/flange as badly as if they were steel.....
User avatar
lammydave
 
Posts: 232
Joined: Sat May 31, 2014 6:09 am
Location: in the shed

Re: Exhaust nuts

Postby Tim_Craig » Tue Jul 29, 2014 8:56 am

lammydave wrote:the exhaust nuts are brass for a reason...

it's my understanding that because they are brass, they dont corrode or bond to the stud/flange as badly as if they were steel.....


Thanks, I believe you are right however, the copper plated ones are plated for this reason also.
I have never seen brass lock nuts and brass being not quite as hard as normal steel means threads can be stripped a lot easier if over tightened.
This is one of the reasons I thought the copper plated lock nuts would be better IMHO.

I could be totally wrong in my thinking here though, any experts out there?

Cheers Tim.
Tim_Craig
 
Posts: 67
Joined: Tue Jun 03, 2014 7:38 am

Re: Exhaust nuts

Postby drivera » Tue Jul 29, 2014 9:08 am

Brass nut , spring washer then flat washer , dab of Loctite on the stud and bob's your uncle :) , always use a ring spanner or socket so as not to round off the edges and you shouldn't need to shift the nuts unless you want to drop the downpipe , then just use another pair of brass nuts
drivera
 
Posts: 220
Joined: Fri May 30, 2014 7:29 pm
Location: East Yorkshire

Re: Exhaust nuts

Postby coaster » Tue Jul 29, 2014 11:51 am

lammydave wrote:the exhaust nuts are brass for a reason...

it's my understanding that because they are brass, they don't corrode or bond to the stud/flange as badly as if they were steel.....


That would be my understanding too, I have a GTS for commuting that had steel exhaust nuts fitted from new and one has snapped the exhaust stud and the other rusted so badly that the remains of the nut had to be ground off and new studs and nuts fitted. Mind you that is a 4 stroke and it doesn't benefit from 2 stroke dripping onto then through leaky gaskets :oops:
User avatar
coaster
 
Posts: 2678
Joined: Fri May 30, 2014 1:00 pm
Location: Norfolk, Flying 8 Balls

Re: Exhaust nuts

Postby bolzenanker » Tue Jul 29, 2014 1:16 pm

Tim

Loads of suggestions on this thread:

viewtopic.php?f=10&t=233
User avatar
bolzenanker
 
Posts: 364
Joined: Mon Jun 02, 2014 10:12 am

Re: Exhaust nuts

Postby Tim_Craig » Tue Jul 29, 2014 4:59 pm

Thanks Gents,

Going to give the copper plated lock nuts a try, see how they perform long term. Agree studs should be loktited in also.

Cheers Tim.
Tim_Craig
 
Posts: 67
Joined: Tue Jun 03, 2014 7:38 am

Re: Exhaust nuts

Postby trotsky » Tue Jul 29, 2014 9:59 pm

Hi Tim, I've used " K " nuts on our Ts ( & Vega ) exhaust studs for years, found them to be excellent. 7mm thread - 8mm spanner, I use a long 6 point socket. Hope this might be of use?....Steve
User avatar
trotsky
 
Posts: 49
Joined: Fri May 30, 2014 10:00 pm

Re: Exhaust nuts

Postby Tim_Craig » Wed Jul 30, 2014 10:22 am

trotsky wrote:Hi Tim, I've used " K " nuts on our Ts ( & Vega ) exhaust studs for years, found them to be excellent. 7mm thread - 8mm spanner, I use a long 6 point socket. Hope this might be of use?....Steve


Thanks Steve, googled them & they look to be worth a try also.

Cheers Tim.
Tim_Craig
 
Posts: 67
Joined: Tue Jun 03, 2014 7:38 am

Re: Exhaust nuts

Postby bigbthesoulman » Wed Aug 06, 2014 9:46 am

trotsky wrote:Hi Tim, I've used " K " nuts on our Ts ( & Vega ) exhaust studs for years, found them to be excellent. 7mm thread - 8mm spanner, I use a long 6 point socket. Hope this might be of use?....Steve

Hello you havnt a link for them nuts do you,interested to try them
bigbthesoulman
 
Posts: 41
Joined: Sat Jun 07, 2014 4:28 pm
Location: stranraer,scotland

Re: Exhaust nuts

Postby rossclark » Fri Aug 08, 2014 9:31 pm

bigbthesoulman wrote:
trotsky wrote:Hi Tim, I've used " K " nuts on our Ts ( & Vega ) exhaust studs for years, found them to be excellent. 7mm thread - 8mm spanner, I use a long 6 point socket. Hope this might be of use?....Steve

Hello you havnt a link for them nuts do you,interested to try them


Just google k nuts loads of places sell them
User avatar
rossclark
 
Posts: 2855
Joined: Fri May 30, 2014 11:23 pm
Location: Lanarkshire


Return to Series 1, 2 & 3

Who is online

Users browsing this forum: Tony Hart and 14 guests