Pressurizing the RV-12iS Coolant System

[rkbrown819]

We have a coolant leak (not in the radiator) somewhere in the coolant system. It doesn't leak when the engine is shut down. It only leaks when the engine is running. So far, we have been unable to find the source of the leak. We want to pressurize the system to see if we can locate the leak. Does anyone know how the coolant system can be pressurize?

 

[KEG]

Get an automotive radiator pressure test kit. They are not expensive.

 

[WJaviation]

If I'm reading this correctly, the procedure is in:

Rotax Line Maintenace Manual 912 i Series
CHECKING OF THE COOLING SYSTEM / RADIATOR CAP
05-50-00 Page 29

Ive never pressurized a coolant system before, but this section seems to outline how to apply pressure and check for leaks.

 

[rkbrown819]

Get an automotive radiator pressure test kit. They are not expensive.

Thanks, tried that already. Every adapter in the kits are too large.

 

[rkbrown819]

If I'm reading this correctly, the procedure is in:

Rotax Line Maintenace Manual 912 i Series
CHECKING OF THE COOLING SYSTEM / RADIATOR CAP
05-50-00 Page 29

I've never pressurized a coolant system before, but this section seems to outline how to apply pressure and check for leaks.

Thanks, this is exactly what I was looking for.
Thank you.

 

[Piper J3]

Best way to find leak (with no added pressure) is to use Coolant UV Dye and Black Light, both available on Amazon. Also, check weep hole on bottom of water pump...