# Engine always running cold in cold weather? **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [December 25, 2006, 7:51pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028 "2006-12-25T19:51:45Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Blazin\_Si](https://avatars.discourse-cdn.com/v4/letter/b/2bfe46/32.png) [@Blazin\_Si](https://forums.speedlife.net/u/Blazin_Si)\ **Post date:** [December 25, 2006, 7:51pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028/1 "2006-12-25T19:51:45Z")
Ever since my B18C was rebuild it has been running cold when the weather is below about 60 degrees. If I let it idle for 10 mins the needle will move up to about normal operating temperature, but once I take it for a ride the needle drops all the way back down. I figured since it had the bigger cams put in it, a bigger fuel pump, bigger injectors and a 12:1 c/r, it would start running a little warmer since I still have a stock dual core Del Sol VTEC radiator. In summer weather the needle reads where it should be at or if I’m at the track it might heat up a little bit, but cold weather has a big effect on what the guage is reading. What could be causing this? It makes me nervous because I’m affraid I might be hurting something if the guage is right. Any help would be appreciated. ---
**Author:** ![brewer15650](https://avatars.discourse-cdn.com/v4/letter/b/858c86/32.png) [@brewer15650](https://forums.speedlife.net/u/brewer15650)\ **Post date:** [December 25, 2006, 8:06pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028/2 "2006-12-25T20:06:33Z")
I had the same problem with my b17 back in the day. It was the thermostat. ---
**Author:** ![flyinglow57](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/flyinglow57/32/5978_2.png) [@flyinglow57](https://forums.speedlife.net/u/flyinglow57)\ **Post date:** [December 25, 2006, 8:11pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028/3 "2006-12-25T20:11:38Z")
do you have any heat when its running cold? if the heat is a lil weak then probably the temp gauge is working… and its a thermostat… if the heat is fine. the guage is probably off… i guess thermostat but ya never know… change the stat and call us in the morning ---
**Author:** ![RickSI](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@RickSI](https://forums.speedlife.net/u/RickSI)\ **Post date:** [December 25, 2006, 8:29pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028/4 "2006-12-25T20:29:31Z")
I had the same problem on my D16z6 and i changed the thermostat and now is running good.Just check on that.If that doesnt help try to cover a section of the radiator and see how it drives till u find the problem. ---
**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\ **Post date:** [December 25, 2006, 8:50pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028/5 "2006-12-25T20:50:20Z")
thermostat . ---
**Author:** ![Blazin\_Si](https://avatars.discourse-cdn.com/v4/letter/b/2bfe46/32.png) [@Blazin\_Si](https://forums.speedlife.net/u/Blazin_Si)\ **Post date:** [December 25, 2006, 8:54pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028/6 "2006-12-25T20:54:34Z")
The heater throws off heat when turned on, but not as much as I’d expect. i don’t drive the car much so I can’t remember what it used to be like before the build. Hopefully it’s just the thermostat. Thanks, I was going to try that first and see what happends. ---
**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\ **Post date:** [December 25, 2006, 9:01pm UTC](https://forums.speedlife.net/t/engine-always-running-cold-in-cold-weather/187028/7 "2006-12-25T21:01:23Z")
it happend to like 4 of my hondas dont worry bout it