[Formerly Steve Wilkinson]

I have a 24" center-mount B&B oil cooler that simply won't flow oil on my 911SC. B&B has checked it out and says it flows oil just fine. I put it on the kitchen counter and pour a big teapot full of boiling water into the upper fitting and it indeed flows just fine--comes out the bottom fitting and the entire cooler gets hot to the touch, particularly the end opposite the inlet and outlet fittings, which is obviously where the cooling tubes terminate.

Put it on the car and run it until I get an indicated oil temp of 200 degrees. Get out and feel the Aeroquip hoses and they're both hot, so obviously the thermostat is working fine. Feel the cooler and the only part that's hot is the little "tank" to which the inlet and outlet fittings are attached. The fins are cool the whole way across the cooler, and the far end of the cooler is literally cold.

Let the car idle for 15 minutes, zero airflow across the cooler, still cold. Crack the top fitting until oil comes out, let it flow for a minute in hopes that this will vent any air blockage, still no change.

The only thing I can think of doing at this point is drilling and tapping a hole in the top of the cooler, at the far end, and installing a plug, back the plug out slightly and see if that vents any mysterious air blockage.

Anybody got any better ideas?

Stephan