2010 Jetta CJAA - Green fluid on intercooler hose

[kingbri1]

Hello,

Each time I remove the lower engine shield for maintenance, I see this green fluid on the intercooler hose on the right front. It’s a neon greenish color. Any ideas? Can’t tell if it’s dripping from up higher or if it coming from the hose connection. Only known issue is a cracked DPF.

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• kingbri1
• Jul 20, 2024

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• kingbri1
• Jul 20, 2024

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• kingbri1
• Jul 20, 2024

 

[turbodieseldyke]

If not antifreeze, it's most likely Pag oil from the A/C system.

 

[kingbri1]

Maybe diesel. Dyed green? I was thinking AC as well but didn’t think it would be visible.

 

[Nuje]

When it's dark out, shine a light (black light if you have one) on it and see if it really glows; if it does - that's PAG oil (air conditioning system).
The only other green oil I can think of in the system is power steering fluid - but it's more dark green, not fluorescent like the PAG oil.

 

[oilhammer]

Refrigerant oil