Koyo Perf Rad and Coolant Problems

[Realchaos1]

Has anyone with a Koyo Performance Rad experience any problems in cold weather? I noticed that when it gets cold the temp gauge goes up for a while and then it will suddenly drop. I assume that the thermostat closes for a while, engine heats up a lil to much, then the thermostat opens.

But what sucks is my waterpump started leaking yesterday. :wtc:

[NIK90s13]

I haven't had any trouble with my koyo, change your thermostat and your water pump, that is going to be the problem.

[boosteds13]

Has anyone with a Koyo Performance Rad experience any problems in cold weather? I noticed that when it gets cold the temp gauge goes up for a while and then it will suddenly drop. I assume that the thermostat closes for a while, engine heats up a lil to much, then the thermostat opens.

But what sucks is my waterpump started leaking yesterday. :wtc:
Yeah man, thats normal if you are reading the water temp from the radiator hose. Mine actually sits cool then when the thermostat opens the temp jumps from about 120 to 190. Then it goes back down to about 140ish and keeps cycling like that. Eventually the cycle permanently fluctuates between 180 and 205.