Did the series V come with the double-wire clamps on the bypass hose?
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I am replacing my bypass hose and have the clamps above. They even have the #2 BA screws. If the car originally came with these clamps, I am wondering if it is a bad idea to use them, given how hard it is to change out the clamps if there is an issue.
So really two topics here - what was originally on the car and thoughts on longevity of the double wire clamps.
Thanks,
Mike
Mike,
Regarding originality, WSM-145 shows "double wire screw clamps" for the by-pass hose and shows
both (???) double wire screw clamps (in the cooling section) and simple "band screw clamps" (in the heater section) for the heater hoses.
All types of screw clamps on hoses suffer from a loss of clamping force as the rubber in the hose goes through "compression set." Not really a problem if the screw clamps are re-tightened after the first few heat cycles and periodically for the life of the hose. I don't like
wire screw clamps because of the highly localized compression loading on the hose,
but there are examples that have been in use for a very long time.
They are
not period correct, but band style clamps such as "screwbands" (aka, Jubilee clips) and "tower" clamps (aka, Wittek clamps) are much easier on the hose because the compression load is spread over a wider area. Like all screw clamps, they need to be re-tightened after the first few heat cycles and periodically for the life of the hose.
Modern cars use a lot of "wide band spring clamps" which are quick to install and continue to squeeze the hose against the internal fitting during / after compression set. Again, they are
not period correct. IMO, they are the best type of clamp in terms of short / long term sealing and hose life for low / medium pressure applications. Properly sized spring clamps are pretty close to "install and forget".
For a very clean / modern look (again,
not period correct), there are "heat shrink hose clamps" that work very well for medium pressure
coolant hoses. Like spring clamps, they continue to squeeze the hose against the internal fitting during / after compression set. The downsides include cost, limited "adjustment" range and not being reusable.
Let the nit-picking begin.