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Old 08-22-2021, 05:45 PM   #1
Mini-Skoolie
 
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Year: 2002
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What kind of heater hose should I be getting?

My first project is removing the heaters in the cabin. I have a RE so I can't just loop the line back around because I need my defrosters. The line that I exposed inside says that it is SAE 20R3 Class D2. Do I need to keep that consistent or can I get a hose that is 30R3?

The rest of the specs are all the same but I have no idea what the classifications mean.

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Old 08-22-2021, 06:47 PM   #2
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20R3 is heater hose, 30R3 is fuel/oil hose
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Old 08-22-2021, 07:16 PM   #3
Mini-Skoolie
 
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Quote:
Originally Posted by o1marc View Post
20R3 is heater hose, 30R3 is fuel/oil hose
That's good to know, the site selling the hose didn't mention any sort of difference at all. Both were almost identical.
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Old 08-22-2021, 07:28 PM   #4
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you should be able to use fuel/oil hose for coolant, but I would worry about using coolant hose with oil; Never use it with fuel.
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Old 08-22-2021, 07:32 PM   #5
Mini-Skoolie
 
Join Date: Mar 2021
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Well the coolant hose is more expensive than the fuel hose so I am safe there. Thank you for clarifying for me though. I'm in a little over my head.
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