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  #1  
Old 03-15-2022, 02:17 PM
P51krause P51krause is offline
 
Join Date: Jan 2019
Location: Camarillo
Posts: 16
Default Coolant hoses

We are at the 5 year mark to do the coolant hoses. Can anyone lead us on the best place to get the hoses/hose kit? Trying to find a part number for them through old invoices and canít seem to find them. Thanks for any help.
Michael Krause
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  #2  
Old 03-15-2022, 02:36 PM
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jrtens jrtens is offline
 
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Location: Utah
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Here is a recent thread on the subject.

https://vansairforce.net/community/s...se+replacement
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Last edited by jrtens : 03-18-2022 at 07:19 AM.
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  #3  
Old 03-16-2022, 07:50 AM
bobg56 bobg56 is offline
 
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Location: Peachtree City, GA
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Lockwood Aviation in Sebring FL
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  #4  
Old 03-16-2022, 05:35 PM
Mich48041 Mich48041 is offline
 
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Location: Riley TWP MI
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Default Coolant Hoses

McMaster Carr
5 Feet Hi-Temp Silicone Coolant Hose Yarn Reinforced 5/8" ID, 1" OD 5296K321
1 Foot Hi-Temp Silicone Coolant Hose Wire Reinforced 5/8" ID, 1" OD Part#: 5591K12 for 90 degree bend
4 each Constant-Tension Clamp for 1 inch I.D. rubber coolant hose Part #: 54205K17
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NAPA 1" I.D. Rubber Heater Hose Part #: NBH H151
--
The original hose clamps are too small for silicone hose. I purchased GRAINGER Hose Clamp, Dia 27mm X 1.6mm, two Pk10 Item # 2UTG8 for 5/8 I.D. silicone hose. I had to cut a little off from the clamp stop-tab to get these clamps open enough to fit over the hose. I would have purchased larger clamps but could not find any 28 or 29 mm clamps. Be careful, some vendors give the hose size, not the clamp size. And the hose gets bigger after being slid onto the fitting.
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  #5  
Old 03-16-2022, 06:51 PM
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Piper J3 Piper J3 is offline
 
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Quote:
Originally Posted by Mich48041 View Post
The original hose clamps are too small for silicone hose.
I reused original clamps with new silicone hoses. No problems....
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  #6  
Old 03-17-2022, 07:14 AM
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SwampRat SwampRat is offline
 
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For some reason the link by jrtens didn't seem to work for me. Not sure if he was pointing to the same place but take a look at: https://vansairforce.net/community/s...ight=hps+hoses.

I used HPS silicon hoses last year and love them. You can reuse the small hose clamps (though I bought a few extra just in case) but be careful to use the correct hose clamps for the radiator hoses. I used the same Constant Tension clamps for these as Mich48041.

HPS Part numbers were as follows (I had plenty left over):
HTHH‐062‐BLUEx10 HTHH‐062 | Blue | 10 Feet
HTHH‐100‐REDx10 HTHH‐100 | Red | 10 Feet
You will also need some 1/4" hose. I used HPS but can't find the details.

For the 90 degree bend, I used the Continental GY58UBP E-Z Coil purchased on Amazon to prevent hose collapse. Very effective.

All this is discussed in depth in the above link. Good luck!
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  #7  
Old 03-17-2022, 09:41 PM
RFSchaller RFSchaller is offline
 
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Location: Phoenix, AZ
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I pulled my coolant hoses two days ago (2nd 5-year replacement). I used automotive rubber heater hoses last time, and I would not again. I was surprised to find the hose walls had softened considerably. On the upside it made removal very easy, but it led me to conclude the 5 year replacement with rubber hoses is an imperative. I plan on using silicone hoses this time.
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  #8  
Old 03-18-2022, 03:44 AM
Mich48041 Mich48041 is offline
 
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Don't buy the hoses that I did (post #4 above). They are 1/8 inch larger in outside diameter compared to the original hoses.
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Last edited by Mich48041 : 04-19-2022 at 02:32 AM. Reason: Added the word "outside".
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  #9  
Old 03-20-2022, 07:49 PM
P51krause P51krause is offline
 
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Location: Camarillo
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Thank you all. I got the coolant hoses at Lockwood and the radiator heater hoses at NAPA. On the number 4 cylinder bottom coolant hose I had to cut it to get it off, scored the aluminum a bit cutting it at the water pump. So mad. I put some gasket sealant on it and hope it doesnít leak. (Shouldnít with how stiff those clamps are) Anyone else have any suggestions besides replacing the whole water pump? Guess Iíll have to wait till I start it up and run it. Thanks again
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  #10  
Old 03-22-2022, 12:18 AM
RFSchaller RFSchaller is offline
 
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Location: Phoenix, AZ
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Mike,

I wouldnít obsess about a surface scratch unless you really gouged it. The coolant system cap is rated for 1.2 bar (about 18 psig) so itís a pretty low pressure system. I scratched mine too during the first replacement 5 years ago with no resulting problems. The clamp keeps the tube in compression, and axial cracks donít shear tubes like circumferential cracks do.

One last fact that is interesting, but I wouldnít rely on: some surface scratches actually put the surface in compression making propagation much less likely. I learned that tidbit while on a root cause of failure team investigating a steam generator tube rupture at the nuke plant where I worked. I always used to say you only really get to know a piece of equipment when it breaks!

Rich
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