[T3] Constant Tension Band Hose Clamp

[Daniel K. Du Vall]

How lose a fit are we talking here because the new ones I got are IMO way too lose.

-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
Sent: Sunday, March 31, 2013 11:18 PM
To: type3 at vwtype3.org
Subject: Re: [T3] Constant Tension Band Hose Clamp

On 1 Apr 2013 at 4:33, Daniel K. Du Vall wrote:

> I found some replacement hoses for the air runners but they are a bit 
> loose fitting. I am looking to use something like the Constant Tension 
> Band Hose Clamp but not sure what size I should be looking for has 
> anyone sized these for hose clamps like this?

It's really best to not use any kind of clamps there. As things warm up and cool down, a slip fit there allows things to slide and accommodate for the various expansion rates of the different parts.

The important thing is to get all the parts aligned nicely. Don't bolt the IAD solidly until all the other parts are in place. I generally install the IAD and both air runners loosely at the same time, and then tighten all the bolts at the same time. Or you can tighten them with the sleeves slipped back on the air runners so that you can observe and correct the alignment. Individual air tubes can be bent to get the alignment perfect before you slide the hose sleeves into place.  

The most common cause of air leaks is improperly aligned parts, which force the sleeves to deform and provide a poor seal.

If your old hose sleeves are deformed from a previous poor assembly, which is common, go ahead and align everything, install the old sleeves and slide them into place. Tighten them down with nylon cable ties. Those will be tight enough to do the job and yet flexible enough to allow the joints to slip when necessary. After a year, you should be able to remove the cable ties and be back to the original look.

--
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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