Review on Dorman 902 109 Thermostat Housing by Ryan Marx

Great two piece part, much better than the original OEM plastic. Easy to install, no leaks. I think the key to no leaks is not to over tighten the 2 mounting bolts. No seal, O-ring. With this setup you will lose about 1/2 gallon of antifreeze, it will spill out the engine side when you remove the case. After reading about other thermostat problems I went ahead and bought a separate thermostat. Everywhere I've looked the thermostat for my 2006 Aveo is listed as 90°C/195°F and that's the one I bought and installed. The thermostat that came with the new case is stamped 87c. I ripped open the old plastic case to get to the thermostat and it was stamped 87c. Confused why the 90c is being sold as a replacement. It was probably necessary to simply install what came with the new case. Everything works fine, no temperature related issues with the 90 degree thermostat. I highly recommend this product.