93grayeg

iTrader: (1)

I have a 93 Civic with a Gsr swap , Latley the car will only heat up to operating temp when at idle for a little. As soon as I take off and start driving it stays down at the cold mark. . Does this sound like a thermostat? It used to never do anything like that.

Thanks

SeanK325

sounds like the thermostat is stuck open to me. i had the same issue with my car when i bought it. changed the thermostat and gasket with OEM parts and it works perfectly now. you should actually switch it out quick. if you have a hot engine and run cold water through it you can crack the block.

93grayeg

iTrader: (1)

thanks for the quick answer, I was pretty sure it was the thermostat, Never thought about cracking the block , good point

SeanK325

i'm going by personal experience. if someone has other ideas hopefully you'll get some other responses. bump.

rhymeshark916

Where should the needle be at on the temperature gauge? Can a brand new oem thermostat(100mi) be stuck? My car does that too. When I drive, it drops down but when I come to a stop or let the car sits, it's fine. I bled the system twice with fan turning on twice.

Bump for the OP. In for some answers too.

D Griff

The needle should sit around 1/3 up the gauge at operating tempurature. And to the OP, definitely sounds like a thermostat to me.

93del

thermostat I had the same problem

tahoeroscoe

me too, cheap easy fix and if it's something else you have fresh coolant and a new thermostat!