hi..tonight, i started my car for about 10 minutes and i went under the hood and felt both of the radiator hoses..the top one seems to be very warm, while the bottom one thats connected to the thermostat seems to be cold..Is this what it's suppost to be like or is there something wrong here?? thanx

 

If you only started it up for 10 minutes, then the thermostat has not opened to let the water circulate yet, as it is trying to reach optimal temperature. The VQ30de engine is a reverse flow cooled engine so this explains why one was hot yet the other was not. Feel again after 20 min or so.