Don, the hoses remain the original length and the bolts I have
inserted and clamped are not long enough to impede flow.
The water pump is new.
I have not disconnected lines to and from radiator to ck for
obstructions, but I do have a new radiator ready to go in, so I will
ck those lines at that time.
It has overheated at 100F and 50F, ambient. It has also overheated
with and without the front heater. With the heater running, I know
it's about to overheat when the blowing heat suddenly becomes cold.
There are many SVX conversions running without any of these issues and
using the stock Vanagon heater, so I don't suspect the stock radiator
isn't up to the task, though I do suspect mine.
Thank you for thinking aloud. It helps to discuss these puzzles.
Sometimes the answer is right there under our noses.
Thanks,
Miguel

On Tue, Aug 25, 2009 at 12:13 AM, Don<dkspence@telus.net> wrote:
> Hi Miguel
>  When you capped the hoses did you do anything, like insert a long bolt say,
> that would impair the coolant flow?
>
> Are there any kinks in your soft hoses? Water pump good?  Can you disconnect
> at each end and blow out the lines with compressed air?
> Try inserting a pice of clear tubing so you can see and analyze the coolant
> flow.
>
> Just a wild thought but might seasonal temperatures be a contributing
> factor?
>
> Does it overheat if you turn the front heater and fan on?
>
> \How long have you had the SVX installed?
>
> Is it possible that the vw rad isn't up to the task for the svx?
>
>
> Just thinking out loud>>>
>
> Don
>

-- 
Miguel