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Exhaust replacment

Discussion in 'Bay Tech Clinic' started by vw076, Sep 28, 2019.

  1. vw076

    vw076 New Member

    Messages:
    8
    Location:
    perth
    Im going through the well worn path of removing my exhaust/heater boxes and replacing it with stainless headers etc.
    What now happens with the heater blower in the engine bay? Are people removing it or leaving it?
    What happens to the non return flaps on the fan shroud?
    How will all this effect the cooling of the engine?

    If there’s are thread which someone can direct me to that would be appreciated as well.
    Thanks in advance!
     
  2. cbus

    cbus Well-Known Member

    Messages:
    13,570
    Location:
    sunshine coast
    You can remove heater blower but ensure that you seal the holes where pipes went thru tinware.

    Gasket silicone or sika the fan shroud lower flaps closed in place.
    Ensure clean surface so that it sticks.

    No issues caused by either.

    Often people don't fit the lower tinware that covered push rod tubes and screwed between case and heads.
    My preference is adapt to keep them.

    Can't prove which method is best but instinct says keep them to control air flow past heads and barrels and I am of the view that leaving them off is just laziness but have no info to prove the case.
    Install in a manner that keeps J pipe heat away from heads etc
     
    Mr Beckstar and Mordred like this.
  3. vw076

    vw076 New Member

    Messages:
    8
    Location:
    perth
    Thanks, I’ll refit the push rod tinware to help keep the heat off, I’ve done a bit of reading about wrapping the headers but doesn’t sound like a great idea
     
    Mr Beckstar likes this.
  4. cbus

    cbus Well-Known Member

    Messages:
    13,570
    Location:
    sunshine coast
    Definately don't wrap headers.
    You will have seen the results when searching.

    I am definately a fan of ceramic coating though.

    Failing that, simple reflective shields of aluminium are effective as well
     
    Mr Beckstar likes this.
  5. kr.au

    kr.au New Member

    Messages:
    25
    Location:
    Brisbane
    Thanks for posting - this job is in my future. Can I ask if you bought the stainless headers etc off the shelf somewhere? Any info on places to shop would be welcome.
     
  6. vw076

    vw076 New Member

    Messages:
    8
    Location:
    perth
  7. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,286
    Location:
    Bracken Ridge, Qld
    If you've got a 1600 type engine and going for VS exhaust replacement :rolleyes: ...... do yourself a favour and weld on flange adaptor plates and get rid of the old clamp style ;)
     
  8. Barry

    Barry Well-Known Member

    Messages:
    6,184
    Location:
    Abbotsford NSW
    Any reason you are getting rid of your heater boxes?

    You talk about the “heater blower in the engine bay” soi am assuming 2L type 4 motor?
     
  9. kr.au

    kr.au New Member

    Messages:
    25
    Location:
    Brisbane
  10. vw076

    vw076 New Member

    Messages:
    8
    Location:
    perth
    @Barry yep 2L type 4 engine
    From what I’ve read if I run equal length headers I won’t be able to keep my heat exchangers. I’m not too bothered loosing the heating as it’s not going to be a daily driver I can pick my days, but I’m more interested in the longevity of stainless exhaust
     
  11. Kai

    Kai Well-Known Member

    Messages:
    4,794
    Location:
    Sydney, NSW
    make sure the muffler is adequately supported so the whole exhaust system is not hanging of the exhaust bolts. Stainless will crack.
     
  12. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,286
    Location:
    Bracken Ridge, Qld
    So you're wanting to run these equal length headers -

    [​IMG]
     
  13. vw076

    vw076 New Member

    Messages:
    8
    Location:
    perth
    I’ve got a type 4 motor 2L, so similar, but exhaust ports fit vertically.... if that makes sense.
     
  14. Barry

    Barry Well-Known Member

    Messages:
    6,184
    Location:
    Abbotsford NSW
    That is some sort of Type 1 motor to Type 4 exhaust?

    If you are after longevity consider ceramic coating your stock system or at least parts of it
     
    KahunaKombi likes this.
  15. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,286
    Location:
    Bracken Ridge, Qld
    Of course it makes sense :confused: ... my bad :eek: ..... couldn't see them on VS site but found them @ Mick Motors ;)
     
  16. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,286
    Location:
    Bracken Ridge, Qld
    Barry likes this.
  17. cbus

    cbus Well-Known Member

    Messages:
    13,570
    Location:
    sunshine coast
    oldman likes this.
  18. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,286
    Location:
    Bracken Ridge, Qld
    VS was ok to find things on until last upgrade - they have a headers section but not all there :confused:

    Prices in USD then freight to be added ..... not sure on any possible GST on the overseas purchase :rolleyes:
     
  19. cbus

    cbus Well-Known Member

    Messages:
    13,570
    Location:
    sunshine coast
    Didn't realise we were so bad against the US$.

    Yeah. Once exchange, $50 freight and the inevitable support for the thugs in parliament it's no cheaper.

    Back to making my own :(
     

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