A few weeks ago the Golf gave a low coolant warning and, not seeing any immediate signs of a leak, I topped if off. This week, I noticed a few pink drips in the garage. This is actually fortunate because it meant there was an external leak of some kind rather than something more serious like an EGR cooler or head gasket leak. Since the puddles were rapidly increasing in size I investigated the source of the leak tonight. Unfortunately it wasn’t anything as easy as a bad hose, clamp, or o-ring; I could see coolant dripping from the radiator. The next step, as it is with most modern VW repairs, was to disassemble the entire car. Although it looks intense, cleaning up the garage prior to starting this project took about as long as actually accessing the radiator.
From searches online it appears this is a somewhat common problem; the fan support vibrates against the thin aluminum radiator tubes until a hole is worn through. During reassembly I’ll add some rubber cushioning in this area to prevent recurrence. A replacement is available locally and I’ll pick it up after work tomorrow; I should be able to have everything back together tomorrow night, though I may let the project stretch into the weekend to thoroughly clean/detail the front bumper while I have everything apart.
Update: Finished this Friday night, relatively easy, no more leak.
