Replacement exhaust that will bypass heat exchangers

Big lumps of metals and spanners. Including servicing and fluids.

Moderators: User administrators, Moderators

Post Reply
Waynerrr
Registered user
Posts: 18
Joined: 01 Jan 2013, 19:02
80-90 Mem No: 0
Location: Oxford

Replacement exhaust that will bypass heat exchangers

Post by Waynerrr »

Hi all. I'm looking to get rid of my rotten heat exchangers and replace them with a 'straight-through' exhaust that'll connect directly to the existing silencer. Sorry, I'm probably not using the correct terms there. Anyway, I posted a similar question a few years ago and someone did say they had done this but didn't give me any specifics. I've tried PMing them but I think the account is long dead. Does anyone know how I might achieve this? Is there a product out there already? I did speak to a guy at Busfest a few years back whose company would build something for me, use my van for the template and then sell the product on. I could never get hold of them after the show. I'd appreciate it if I didn't get any "why are you removing the heat exchangers?" questions, thanks :)
1981 2.0L air-cooled Transporter conversion

User avatar
bigherb
Registered user
Posts: 2579
Joined: 27 Mar 2008, 13:50
80-90 Mem No: 5789
Location: West Kent

Re: Replacement exhaust that will bypass heat exchangers

Post by bigherb »

They are called J tubes although they are not actually a J tube on a CU engine.
But the heat exchangers help cool the engine.
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow

shepster
Registered user
Posts: 1672
Joined: 12 Oct 2005, 11:14
80-90 Mem No: 1342
Location: Wolverhampton.

Re: Replacement exhaust that will bypass heat exchangers

Post by shepster »

bigherb wrote:They are called J tubes
But the heat exchangers help cool the engine.

Do they, I thought they just provided heat for warming?

learn something every day.
2.1 DJ running on carb and LPG.

weimarbus
Registered user
Posts: 808
Joined: 19 Jun 2010, 12:53
80-90 Mem No: 10165
Location: coulsdon

Re: Replacement exhaust that will bypass heat exchangers

Post by weimarbus »

Sorry can't do links, google vw type 4 exhaust headers available from Heritage and other CSP suppliers, mind you at those prices it would be cheaper to get something custom made, check local exhaust builders.
1985 hi-top 2.1MV with DG carb and LPG
1955 trials buggy with 1.9 DG high lift cam and twin dell's (now sold)
1972 1303 beetle
1992 Audi 100 2.8 quattro estate
1967 Vw  Madison kit

george2490
Registered user
Posts: 313
Joined: 24 Mar 2015, 11:44
80-90 Mem No: 14339
Location: Aberfoyle

Re: Replacement exhaust that will bypass heat exchangers

Post by george2490 »

I just got some from speed shop.
£220.
Look great and fit properly.
Not ran the engine on them yet.

Sent from my SM-A320FL using Tapatalk
2.0 CU

User avatar
sarran1955
Registered user
Posts: 1440
Joined: 11 Mar 2009, 18:51
80-90 Mem No: 6754
Location: 6, les Hauts de Sarran 19800, Sarran ,Limousin ,FRANCE

Re: Replacement exhaust that will bypass heat exchangers

Post by sarran1955 »

Hello,

If all you want to do is remove the heat exchangers to fit J tubes....

Then you can remove the exchangers, and cut off the tinware and fibreglass.....revealing....J tubes...

Rattle can hi temp shiny paint....et voila.. :)

Maybe fit new nuts and copper gaskets.. :wink:

Air-cooled Bliss.. 8)

Cordialement,

:ok
Image

shepster
Registered user
Posts: 1672
Joined: 12 Oct 2005, 11:14
80-90 Mem No: 1342
Location: Wolverhampton.

Re: Replacement exhaust that will bypass heat exchangers

Post by shepster »

So no engine cooling then?
2.1 DJ running on carb and LPG.

Post Reply