Years ago I replaced one steel coolant line with marine hose, rubber. Greenline I think. This was in my old 82 diesel that I converted to 1800 gasser. It worked fine for the 10 years I ran that van. This was full length from engine to rad. But one caveat, it was only the one line that was replaced, I ran the new line rubber line parallel to remaining steel. It was a tight fit through the body members. I don't think I could have ran two rubber lines.

Alistair

> On May 11, 2017, at 8:01 AM, Neil N <musomuso@GMAIL.COM> wrote:
> 
> Hi all. This is regarding a Jetta ABA engine in a Vanagon.
> 
> I intend to replace 2 coolant flex hoses on my Vanagon with 1.25" hose
> from my local semi truck repair shop. It's on order. It's application
> may be for a semi truck heater core circuit. A similar 1" hose I saw
> at this shop took a large radius 90º bend which for my uses, would be
> ideal.
> 
> IF this new 1.25" hose is intended for heater core circuit, would
> (possibly) hotter coolant straight from the engine cause it to balloon
> out or otherwise fail prematurely? The longest piece would be about
> 3'. The flex hoses I'm replacing have a thinner wall construction.
> 
> If this hose is ok for this application, it might be of use for other
> engine swappers requiring custom hoses. It might eliminate some
> cooling hose unions.
> 
> Neil.
> 
> 
> 
> -- 
> Neil n
> 
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