exhaust

robb Officially Full-On Dubber

279 posts · joined Apr 2010 · 3 Jun 2010, 9:01 pm

#782695

ok brains trust i have a nos exhaust for a type 3 would like any ideas on how to stop it rusting from the inside out some kind of coating they tell me they can only do ceramic coating on the outside any ideas would be good
ta
robb

grumble Son of Jim - Creator of Good

2,672 posts · joined Jun 2008 · 3 Jun 2010, 9:14 pm

#782699

You could leave it in the box but that would defeat the purpose of buying it.Realistically though an engine will produce approx i litre of water vapour for every litre of fuel it burns,this coupled with the other by products of combustion make a corrosive substance which corrode the mufflers internally.the best way is to run it long enough to evaporate this moisture or use a stainless steel muffler.I have seen alot of you beaut products over the years but the companies usually disappear before any claims are paid.

robb Officially Full-On Dubber

279 posts · joined Apr 2010 · 3 Jun 2010, 9:26 pm

#782702

thanks for that info professor grumble the things you can learn is unreal

cb john Wolfsburg Wizard

470 posts · joined Jun 2007 · 3 Jun 2010, 10:58 pm

#782748

On my 911, I have SSI stainless steel exhaust for close to 20 years... still as new...On my bugs I use the same...

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 · 3 Jun 2010, 11:22 pm

#782754

robb wrote:ok brains trust
i have a nos exhaust for a type 3 would like any ideas on how to stop it rusting from the inside out
some kind of coating
they tell me they can only do ceramic coating on the outside any ideas would be good
ta
robb

Hi Robb

Ceramic coating IS expensive... ??

You could get it Zinc galvanised... ??

or painting it with hi temp paint... EPOXY..??

You would need to pour some paint inside it and turn it every which way ...

a stainless muffler is also expensive to buy initially...

or You could pour some oil into it...
or pump some grease into it... never actually done this ??

although My Danish made muffler has lasted a few years and I kept the outside painted with High Temp paint..

but it kept cracking... so rust wasn't the problem... lol

best of luck

LEE

- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

cb john Wolfsburg Wizard

470 posts · joined Jun 2007 · 3 Jun 2010, 11:30 pm

#782757

No coating, Zinc, heat resistant paint will last more than a few hours...heat expansion, contraction, water vapors, plus lots of other things will eat your mild steel exhaust, no matter what you do...or how much you spend to protect it..

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 · 3 Jun 2010, 11:49 pm

#782760

cb john wrote:No coating, Zinc, heat resistant paint will last more than a few hours...heat expansion, contraction, water vapors, plus lots of other things will eat your mild steel exhaust, no matter what you do...or how much you spend to protect it..

Probably the best thing about VW Mufflers is they do get hot
Very hot... so the water vapors etc should be burnt up quickly..

much faster than a front engined car.. rear muffler...

I used good quality High Temperature muffler paint which lasts great... doesn';t last forever on a VW muffler though... lol

OK.. I'll recommend Hi temp paint on the outside and oil or grease inside..

the oil or grease will need to be added frequently...

as it will be burnt up....

maybe lithium based grease rather than the clay based green chassis grease....

LEE

- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 4 Jun 2010, 8:18 am

#782793

68AutoBug wrote:OK.. I'll recommend Hi temp paint on the outside and oil or grease inside..

the oil or grease will need to be added frequently...

as it will be burnt up....

maybe lithium based grease rather than the clay based green chassis grease....

LEE

🤪 WTF Lee??

Ceramic coating isnt THAT expensive
I just had it done
No it doesnt do the inside

Stock type exhaust / mufflers are going to be REAL hard to retro fit protection
The problem is you cant seperate exhaust and muffler on a stock set up

if you want to keep the stock exhaust "primo" Grumble is right
Put it in a box or drive it
Dont do 2km drive in it once a week

A custom made set up with a detachable stainless steel muffler would be the best

Futue te ipsum!!!

1303Steve Scirocco Rare

8,650 posts · joined Aug 2002 · 4 Jun 2010, 8:35 am

#782796

Hi

Get it ceramic coated and only drive it on trips lasting over 1/2 an hour, that will maximise its life, but rust in a steel system is like the old weight loss add, (use Kiwi accent) "it wont happens overnight, but it will happen".

Steve

grumble Son of Jim - Creator of Good

2,672 posts · joined Jun 2008 · 4 Jun 2010, 8:46 pm

#782897

Bizarre wrote:
68AutoBug wrote:OK.. I'll recommend Hi temp paint on the outside and oil or grease inside..

the oil or grease will need to be added frequently...

as it will be burnt up....

maybe lithium based grease rather than the clay based green chassis grease....

LEE
🤪 WTF Lee??

Ceramic coating isnt THAT expensive
I just had it done
No it doesnt do the inside

Stock type exhaust / mufflers are going to be REAL hard to retro fit protection
The problem is you cant seperate exhaust and muffler on a stock set up

if you want to keep the stock exhaust "primo" Grumble is right
Put it in a box or drive it
Dont do 2km drive in it once a week

Thanks Bizzarre,there is no real answer and Definitely do not fill/coat it with oil ,the EPA and the police will be after you for the smoke as it burns off.

robb Officially Full-On Dubber

279 posts · joined Apr 2010 · 4 Jun 2010, 11:05 pm

#782926

thanks everyone for your in put got some tinken to do

robb Officially Full-On Dubber

279 posts · joined Apr 2010 · 6 Jun 2010, 3:06 pm

#783193

calling brains trust dose any one know how hot a exhaust can get internally

bus914 Custom Title Time!

1,230 posts · joined Aug 2002 · 6 Jun 2010, 3:24 pm

#783198

Probably not worth worrying about considering that there are still type 3's around with stock mufflers from the factory, so this one should last about 40 years too. Most that I've seen were badly rusted on the outside. Maybe just avoid short trips, to ensure that it does get hot enough to get rid of any condensation.

[img]https://i4.ytimg.com/vi/KOKlJpsfCyk/default.jpg[/img] Click the thumbnail for video👍

bajachris88 The international telephone dialing code for Antarctica is 6

6,661 posts · joined Apr 2005 · 6 Jun 2010, 4:59 pm

#783218

I would imagine that would be why the stainless steel zorts are classed as the upgrade, not necessarly for performance but for lack of wearing.

Stainless muffs on egay are cheap az. But ricer. But are a discount option. smallest you would find though would be 2.5inch outlet. Maybe too big. often come with free detatchable silencers though that reduce the outlet to like an inch and half 😂. It does make a difference in quieting, but that will bring the torque back up also.

What about electroplating? of say moula wasn't a concern?

(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 👍
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta!

robb Officially Full-On Dubber

279 posts · joined Apr 2010 · 6 Jun 2010, 10:49 pm

#783347

why i ask about how hot an exhaust may get inside i ve heard of rust treatmeant which is a 2 pack set up which may with stand high temp not sure how high then high temp paint on the outside and im done

LIFE IN THE LOW LANE All people have the right to stupidity but some abuse the pr

2,534 posts · joined Mar 2007 · 7 Jun 2010, 8:33 pm

#783477

Just go custom and get stainless. Save you a fortune in the long run......

ACCEPT THAT SOME DAYS YOU ARE THE PIDGEON AND SOME DAYS YOU ARE THE STATUE

Alder Outlaws VW Racing - check it out on fb!!

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 7 Jun 2010, 8:36 pm

#783480

robb wrote:why i ask about how hot an exhaust may get inside i ve heard of rust treatmeant which is a 2 pack set up which may with stand high temp not sure how high then high temp paint on the outside and im done

but that system wont work on your combined stocker

Futue te ipsum!!!

Gracey Wolfsburg Wizard

511 posts · joined Feb 2003 · 7 Jun 2010, 9:50 pm

#783504

Bizarre wrote:[

Ceramic coating isnt THAT expensive
I just had it done
No it doesnt do the inside

That might depend on where you get the coating done.
I had a set of merged headers coated by HPC a while ago and they were coated inside and out.

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 8 Jun 2010, 8:39 am

#783539

Intersting

I thought it was like "sprayed" on with a gun

If it was a "pipe" you could get to both ends i suppose - but stock and heater boxes or my spaghetti header set up i didnt think it was possible

Futue te ipsum!!!