Cooling System - Build Method

[nelmo]

I may be over-analysing this so apologies if it is a stupid question but...

 

I'm not using a water rail and I have a bit of a maze of ally pipes and silicone rubber bends. The final result will have a potential world record for number of jubilee clips in one engine bay :-)

 

When joining a silicone pipe to an ally pipe, is there a correct amount of pipe that must fit into each? Do I use as much pipe of each as I can (ie. a lot of overlap) or just enough to get the jubilee clip on (with a few mm either side)?

 

Intuitively, it would seem that the more overlap, the better but maybe not?

 

See very bad diagram I've attached...

 

Edited April 4, 2016 by nelmo

[Snapperpaul]

The more the better

I have spent a fortune on Mikalor type clamps

[Guest chris brown]

About twice the width of a jubilee clip is about right any more and it can be a right pig to get pipes apart after a few years. Any less and the clip may not be fully on the inner pipe.

[Longboarder]

Bad practice to put a silicone pipe on a straight ally pipe. Silicone is very low friction material, even when clamped. The ally pipe must have a swaged end so there is a shoulder. The clamp then holds behind the shoulder and compression prevents the pipes moving.

 

Nigel

[nelmo]

Bad practice to put a silicone pipe on a straight ally pipe. Silicone is very low friction material, even when clamped. The ally pipe must have a swaged end so there is a shoulder. The clamp then holds behind the shoulder and compression prevents the pipes moving.

 

Nigel

Balls - really? Is there a simple method to manually swage a pipe? I don't want to pay a fortune for a dedicated tool...

[tractor]

mine is made up of bits of alloy hoover pipe (don't tell the wife) onto silicone hose with just jubilee clips and to date I have had no problems

[ozz]

I tried allsorts when building mine even string soaked in epoxy and wrapped round the tube, punching a series of dots around the inside of the pipe ( I had a lot of aluminium tube from a tv aerial mast) .

 

Nothing really worked well except bicycle inner tube between the pipe and hose and clamped with the threaded bar type hose clamp.

 

In the end after chasing leaks for a year the method I found best in the end was to buy some of these

 

http://www.ebay.co.uk/itm/Aluminium-Alloy-Hose-Joiners-Silicone-Pipe-Metal-Connector-Swaged-Beaded-Long-/190884993451?var=&hash=item2c71a1d9ab:m:mhPwcOjv1lF198ByGZ-FVFA

[nelmo]

I don't presume to question more experienced people but none of the GBS kit has swaged pipes and apart from the 100mm section in ozz's post, I can't find anyone selling decent lengths with swaged ends.

 

I'll just stick with what I have and hope the clamps are enough...

 

Back to the original question - if I overlap a lot, I might need 2 clips, no? One where each pipe ends?

[Guest 2b cruising]

If in doubt I use two mikalor clamps on each end.

I live near bluebel hill near Maidstone Kent.

I earned the man company I worked for countless thousand of pounds going to the midway point of the hill to replace silicone turbo hoses and double clamps.

I never went out to the same truck twice after doing that.

[fry61]

Florin's plumbing is copper pipe for all the bits that are on the engine & just a few standard hoses for engine to radiator & heater connections -- soldered joints copper pipe to copper unions & soldered olive to create a "swaged end" where changing to flexi-hose.

[Guest 2b cruising]

Nice one Bob.

It is even easier than stainless to paint to match your engine colour.

[fry61]

No mate, left as nature intended -- what else would I do with my Christmas present -- a large tin of Brasso. ( I keep the Duraglit for the S/steel body.)

[Guest 2b cruising]

I thought that was your prezzy to swimbo.

[fry61]

No, Mo doesn't even know how an iron works; too busy helping me in the workshop.

[rthomas69]

An alternative to Mikalor clamps is the JCS Hi-torque, fraction of the cost, bigger range of adjustment on each size of clamp. They may look like a standard Jubilee type clamp but with the recommended 15Nm tightening torque they hold well - we use them on engines with over 5Bar pressure (70PSI old school) on silicone hose.

 

Rich