134A Schrader valve leak

[cossie]

Hi everyone.. I have a slight freon leak from the schrader valve located beside the condenser. Question is... do I need to replace the whole condenser or just the valve? If it's just the valve, is it a generic one used in other cars or is it an MB specific part.

Can someone share the part number please.

Regards.

 

[emerydc8]

This is from a 1995 E420 but I think the valve is the same.

 

[cossie]

Great! Thanks Jon.

 

[gsxr]

The valve can be replaced separately. Only use OE / Genuine MB valves. I bought aftermarket (too cheap to resist) and was not impressed with the design or build quality. I bought a new OE valve and it was visibly different. I haven't installed yet, need to discharge / evac the system, etc.

The valve at the low-pressure service port is different of course, I'd consider changing both while the system is open.

 

[alabbasi]

Pretty sure a bicycle valve will work. I've repaired them with puncture repair kits from walmart

 

[gsxr]

Pretty sure a bicycle valve will work. I've repaired them with puncture repair kits from walmart

Nope. The 134a ports do not use replaceable Schrader valves like the older R-12 ports. With 134a, you have to unscrew the entire port from the pipe. At least, the ones I've seen do not appear to have removable internal parts.

Aftermarket high-side port is ~$5, OE is ~$19 list.

https://www.ecstuning.com/b-genuine-mercedes-benz-parts/valve/0028305484/

https://www.mboemparts.com/oem-parts/mercedes-benz-valve-0028305484

 

[gerryvz]

Why R-12 totally rocks !!!

 

[emerydc8]

Just for reference, the high-side Schrader valve from the dealer comes with an O-ring.