Quote Originally Posted by kompressor View Post
Actually, the previous comments stated na pag walang thermostat ay overcooled ang engine. Napasok lang sa discussion ang overheat kasi nga common practice ng mga "traditional" mechanics na tanggalin ang thermostat as a band-aid remedy against overheating. And ang line of reasoning nila ay "dinesign yan para sa Japan eh wala naman tayong taglamig".

Regarding your previous testimony, you should have replaced the thermostat with an OEM one instead of removing it. If there are no leaks or clogged lines in the cooling system and the thermostat and water pumps work properly, the same situation you mentioned (parked with engine and a/c on under sunlight) can be achieved even with the thermostat installed. Done them both on a Tamaraw FX (7k) and a Nissan Vanette (LD20 diesel) without overheating. Both with thermostats intact.

You also mentioned that you did notice your engine's response to be sluggish when the temp needle is below the ¼ range. That is because your oil's viscosity is not maximized if your engine's temp is not in the optimal operating temp range. This will result to premature wear and tear. You'll be experiencing loose cylinder compression earlier than those who do not remove their thermostat. Not to mention, a noticeable drop in fuel economy. Of course, thermostats are bound to fail due to wear and tear but if you're conscious about your vehicle's maintenance, you'll be aware that a thermostat is due for replacement without having to experience an overheat. Just be conscious of your temp gauge like a driving teenager-wannabe-racer who always looks at his speedometer.

Agree about what you have said about the benefits of having thermostat installed, so far my AUV is still in very good condition, I remember that I removed the T-stat before I change my timing belt about 90t kms.....last month already change again my t-belt for the 3rd time, until now, I haven't installed the new t-sat