Volvo Penta AQ 131 151 171 230 250 B230 4 Cylinder Engine Coolant Tank Reservoir Heat Exchanger Core 856135 855406 Strainer 855439. In excellent condition. No cracks in strainer or core. This was pressure tested and passed. Great replacement unit.
This is from AQ151 and has a normal size heat exchanger element or core. This is fully compatible with the 131, 151, 230, 250. Can also fit AQ171 if you change the plastic fitting.