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leaks on cooling system

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yck.laurens(at)wanadoo.fr
Guest

Posted: Fri Mar 28, 2008 2:14 am Post subject: leaks on cooling system

I have small leaks on the radiator connections, and tightening the  

clamp has no effect. does somebody has the right solution ?



thanks for



FPSCZ

Trevpond(at)aol.com
Guest

Posted: Fri Mar 28, 2008 3:44 am Post subject: leaks on cooling system

Hi there,

  

 Are you using Evans?

  

 I have just had to change my Radiator Hoses after 150 hours using Evans -  it seemed to soften them and developed a leak on the ends - tightening the  clips didn't achieve anything.  The hoses had expanded before the clamps  and had gone "Squishy".

  

 Hoses have been changed and Evans flushed out and replaced with 50/50  glycol mix and all is now well again.

  

 regards

  

  

  

 Trev Pond

 G-LINN

     [quote][b]

yck.laurens(at)wanadoo.fr
Guest

Posted: Sat Mar 29, 2008 12:16 am Post subject: leaks on cooling system

No, I don't use Evans,

 but I think its perhaps time to change the hoses, and  fit  the new clamps from rotax. 

  

 thanks

 [quote]   ---

josok-e(at)ukolo.fi
Guest

Posted: Sat Mar 29, 2008 6:54 am Post subject: leaks on cooling system

Leaking problems here too. As long as the engine is warm, not a drop. If i don't use the engine heater, there will be a few drops. Seems to be a problem caused by different expansion ratios. The traditional screw type hose clamps are not good enough. However i could only find Rotax 17 mm spring clamps. Anyboby with a source and or partnumber for 25 mm spring hose clamps?



Regards,



Jos Okhuijsen

Visit -  www.EuropaOwners.org

rparigor(at)suffolk.lib.n
Guest

Posted: Sat Mar 29, 2008 7:38 am Post subject: leaks on cooling system

Hi Jos



"Anyboby with a source and or partnumber for 25 mm spring hose clamps?"



I am not a tremendous fan of hose clamps that hold a constant dimension on

something that heats up and cools down. If you overtighten to prevent cold

leaking, it can permanent damage hose once things expand when things warm

up.



http://rotorclip.com/



to the rescue.



Rotax changed over to band style spring clamps for coolant hoses for just

the reason described.



www.mcmaster.com sells Wide-Band Self-Tightening Spring Hose and Tube

Clamps on page 252.



I know I ordered a full compliment for my 914 install, some from McMaster,

and some from Rotorclip. I can't remember if I ordered direct from

Rotorclip, or if they gave me a distributor and ordered from them. 



For what it is worth, I have a set of blue Silicone hoses for 914, which

are slippery creatures compared to traditional hose. 



Ron Parigoris



PS McMaster has a nice selection of Miniature Bolt Hose and Tube Clamps in

304 SS on page 251 "fuel, sight, vent" line and other from 19/64" up to

45/64".

Ivor Phillips

Joined: 16 Jan 2006
Posts: 253
Location: London UK

Posted: Sat Mar 29, 2008 7:54 am Post subject: leaks on cooling system

Hi Jos

I used Vauxhall/Opel/GM Part number 90572595 spring clamps,

I have used Silicone hoses on my 914 which are slightly thicker than the

stock Rotax hose, But these clips are suitable for both type of hoses,

Regards

Ivor



Subject: Re: leaks on cooling system



The traditional screw type hose clamps are not good enough. However i

could only find Rotax 17 mm spring clamps. Anyboby with a source and or

partnumber for 25 mm spring hose clamps?



Regards,



Jos Okhuijsen

josok-e(at)ukolo.fi
Guest

Posted: Sat Mar 29, 2008 8:41 am Post subject: leaks on cooling system

Thank you guys for the rescue. Because i have a very non-standard cooling system, i had to make connections from different pieces of hose. It looks like a patch blanket  As a result there are a lot more possible leaking conections as i would like. 

Remembers me: I have a brand new oil cooler, which i will not use. Available for shipping costs.



Regards,



Jos Okhuijsen

Visit -  www.EuropaOwners.org

rparigor(at)suffolk.lib.n
Guest

Posted: Sun Mar 30, 2008 3:47 pm Post subject: leaks on cooling system

Hi Jos



I just remembered taking a look at using heat shrink for sealing hose connections:



http://www.gates.com/brochure.cfm?brochure=1020



Never got samples. Perhaps I saw that McMaster sells??



If you or anyone has experience with this technology, please share with group and what thoughts are for Rotax application in Europa.



Ron Parigoris

Visit -  www.EuropaOwners.org

Fergus Kyle

Joined: 03 Jun 2007
Posts: 291
Location: Burlington ON Canada

Posted: Sun Mar 30, 2008 7:51 pm Post subject: leaks on cooling system

Ron P:

	I followed the discussion and found solace in spring band clamps per

McMaster-Carr page 252 bottom, and the pliers suggested thereto. Is this

what the conference is on? I have to move the two forward coolant lines,

starboard side to accommodate the SD20 alternator and hope these satisfy the

need........

	Did you do this?

Cheers, Ferg

rparigor(at)suffolk.lib.n
Guest

Posted: Sun Mar 30, 2008 8:44 pm Post subject: leaks on cooling system

Hi Ferg



" I followed the discussion and found solace in spring band clamps per

 	  Quote: 	
		   McMaster-Carr page 252 bottom, and the pliers suggested thereto. Is this

 what the conference is on? I have to move the two forward coolant lines,

 starboard side to accommodate the SD20 alternator and hope these satisfy the

 need........

 	Did you do this?"


	


I didn't yet do final install of 914. When I had it hung temporary, I

ordered clamps I thought I would need. Will use spring band clamps on all

coolant connections. I can't remember exactly which clamps I got from

McMaster, but they I think only carry the very wide ones, and they also

were missing exact size I needed for some. I too ordered the pliers, very

good investment. Best wear goggles when doing install, if one ever failed

or slipped out of pliers it has easy potential of blinding you. I fooled

with other than purpose built pliers, far more dangerous. I supplemented

McMaster clamps with Rotor clip order.



Ron Parigoris

ptag.dev(at)tiscali.co.uk
Guest

Posted: Sun Mar 30, 2008 11:48 pm Post subject: leaks on cooling system

Hi! Ferg/Ron/all

Courtesy Ivor Phillips I've used the same spring clamps which are

Vauxall motor parts. However I also used the "remote applicator" from

Halfords which I found needed a slight lip up stand welding to it to

prevent the spring clips flying out so easily. It was also necessary to

remove (dremel cutter) the "stop tag" from the clip to open them enough

to get over Ivor's slightly larger diameter pipes.

I had to resort to using a jubilee screw clip on the water pump

connection pipe since it is a stubby piece of pipe of insufficient

length to accommodate the wide band spring clips.

I will say that these spring clips are far more professional than the

original jubilee screw clips and the remote applicator allows access

where it's impossible to get two hands at the same time.

Regards

Bob Harrison G-PTAG



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