Radiator drain plug

Page may contain affiliate links. Please see terms for details.

saff

MB Enthusiast
SUPPORTER
Joined
Mar 20, 2016
Messages
2,063
Location
Lancashire
Car
Audi A8 D4 4.2 TDI W246 B180 CDI Sport
So a couple of weeks ago I decide to change the coolant as the car is 12 years old now. I loosen the radiator drain plug (red) and the system drains down. Refill with a 50/50 MB mix and let warm until stat opens. Notice a drip from the drain plug, not the spout but the plug and washer itself. Curse quietly and drain again then refit but this time using a rubber washer instead of the serrated lock washer as a temp solution and order a new plug and washer.
This has been leak fee for 2 weeks.
Today drain down again and fit new plug and washer. Leak is back as before, very minor weep but there none the less.
Anyone ever had this issue before?

Also found a screw in one of the front tyres and both quite low so getting new ones fitted tomorrow.
Ho hum....
 
Hmmm it seems this is not a common issue.
I'm going to revert back to the rubber washer solution as I know it works and keep a close eye on the coolant level.
 

Users who are viewing this thread

Back
Top Bottom