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 aintgotitmusthaveit
A.k.a.: Nick
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| posted on February 13th, 2012 at 02:59 PM |
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sealing ill fitting J tubes
Hi guys,
I have ought a new exhaust and the J tubes are about1-2mm smaller in diameter than the mating tube- so big that it doesnt seal and sucks air in off
throttle (causing abackfire!)
How do I seal it?
Will exhasut cement work?
RTV silicon during assembly?
or do I try the silicon coulers used on intercoolers and the like.
I tried lagging it ip and it worked a bit but the lagging got shagged.
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bajachris88
A.k.a.: Chris Leete
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| posted on February 13th, 2012 at 04:00 PM |
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you can buy a product called muffler putty to do the job, its always a good insurance policy i rekon when i slide j tubes in place and use the clamps
because usually i find the clamps end up squishing the j tubes into a slight egg shape (ever so small) leaving two open holes for exhaust to leak.
Otherwise that metal filler epoxy putty will do the trick.
Keep an eye on it over time, as it is brittle. Vibrations don't seem to knock mine off, but i check just in case. to 'uninstall' the exhaust with
the putty in place is a matter of giving the joint a whack with a spanner to break the metal putty bond, and it will crack off.
(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! |
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waveman1500
Custom Title Time!
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| posted on February 13th, 2012 at 04:20 PM |
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If you just bought the exhaust and it doesn't fit together then take it back! That is unacceptable. J-tubes should seal using only the gaskets and
clamps. If you didn't get new gaskets and clamps then that is the issue. If you bought a new engine and it didn't run, would you be asking on the
forums how to fix it? Of course not, you should take it straight back to the supplier.
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 vw54
Super Administrator
Always Waiting 4 Friday
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| posted on February 13th, 2012 at 04:23 PM |
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Who did u buy it from yes send it back
If you have origional j pipes / exhaust heater boxes then use the locktite exhaust sealant blue stuff
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Joel
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| posted on February 13th, 2012 at 04:23 PM |
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If it's a muffler you plan on sticking with for a while it's well worth the effort to cut the stupid donut/clamp joint off and weld flange joints on
instead.
That really was a derp on VWs part and those new wire mesh type donuts make a hopeless situation even worse.
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aintgotitmusthaveit
A.k.a.: Nick
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| posted on February 13th, 2012 at 05:04 PM |
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Guys it's one of. The sidewinder exhausts from classic
Only got around to installing it on the weekend and hat to peen one side closed to get it to fit the pulley driving the supercharger
So I can't take it back!
It is disappointing though. The tube joining the main extractor had over 6mm clearance!
I had to heat it with an oxy and shrink it!
Really quite a poor fit, but @ 1/3 the price of the a1 or csp ones thought I'd make it work.
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vw54
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| posted on February 13th, 2012 at 05:06 PM |
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| Quote: |
Guys it's one of. The sidewinder exhausts from classic
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there you have it
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aintgotitmusthaveit
A.k.a.: Nick
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| posted on February 13th, 2012 at 05:11 PM |
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Vw54
Others reported these as greAt!
I think I remember Craig fitted one and said it fit fine.
This was the second batch he got in...
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vwo60
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| posted on February 13th, 2012 at 06:32 PM |
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I have two of them and the only thing i had to do was cut and weld the bend on the muffler so it cleared the rear caliper. both the j tubes were a
good fit.
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 Bizarre
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| posted on February 13th, 2012 at 06:43 PM |
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| Quote: | Originally
posted by Joel
If it's a muffler you plan on sticking with for a while it's well worth the effort to cut the stupid donut/clamp joint off and weld flange joints on
instead.
That really was a derp on VWs part and those new wire mesh type donuts make a hopeless situation even worse.
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Totally agree
Dumbest part of a VW
Futue te ipsum!!!
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68AutoBug
A.k.a.: Lee Noonan
Aircooled Master
Beetle Restorer - Experience over 138% - YIKES --
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| posted on February 13th, 2012 at 09:36 PM |
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| Quote: | Originally
posted by aintgotitmusthaveit
Hi guys,
I have ought a new exhaust and the J tubes are about1-2mm smaller in diameter than the mating tube- so big that it doesnt seal and sucks air in off
throttle (causing abackfire!)
How do I seal it?
Will exhasut cement work?
RTV silicon during assembly?
or do I try the silicon coulers used on intercoolers and the like.
I tried lagging it ip and it worked a bit but the lagging got shagged.
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Yes You can use RTV Silicone [silastic] I use it on my exhausts
all the time... info came from an exhaust fitter.. used it when fitting extractors to cars...
nothing happens to it.. doesn't fall off etc or burn...
just make sure its 100% clean metal.. I use alcohol swabs to clean the metal... never have any problems..
I still use gaskets but they haven't been any good since they took the asbestos out of them.. lol
I let the silicon nearly cure then do up the bolts/nuts etc..
and Yes those stupid VW exhaust clamps were good in 1939
not so good in the 21st century ..lol
cheers
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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