90-GST
10+ Year Contributor
- 106
- 1
- Aug 15, 2008
-
St. Louis,
Missouri
I have tried just about everything and still can't figure this out. I have a 97 gsx that I rebuilt. It was sitting for a year and a half with the engine just sitting in by motor mounts, and just recently did I get it running again. And I've had this problem the entire time.
At idle, it will be fine. It will run around 180-190* for 20 minutes. But when I start to drive it around it starts to get hot. I have replaced the thermostat with a 175*, flushed the system, replaced the radiator with a brand new cx racing aluminum one and two slim fans(which are always on via link), replaced the radiator cap, made foam ducting between the radiator and fmic, used two bottles of water wetter and a 40/60 coolant/water mixtere.
When I drive it, the temp slowly creaps up. Around town it will run 186-193ish except for hills, it will get to 210 sometimes, but when I get on the highway, or exceed 50mph, it will increase. 200 to 203, back down to 200 for 5 seconds, then up to 203 again. And continues to do this from 203 to 206, 210, 213, etc. It seems like once it gets to a certain temp, it just gets worse. Almost like it looses water, because after it overheats, I've got to add a decent amount. When I get off the highway, it will run 223-229 unless sitting it will go up.
This problem is getting extremely bothersome. I'm trying to sell the car, and I can't very well do that with it overheating. Any ideas?
I thought it might be beneficial to know that I took the front bumper off, and it would run 206-219* on the highway, but never really got hotter than that. But when I put the bumper on it will get hotter. Even after the ducting.
At idle, it will be fine. It will run around 180-190* for 20 minutes. But when I start to drive it around it starts to get hot. I have replaced the thermostat with a 175*, flushed the system, replaced the radiator with a brand new cx racing aluminum one and two slim fans(which are always on via link), replaced the radiator cap, made foam ducting between the radiator and fmic, used two bottles of water wetter and a 40/60 coolant/water mixtere.
When I drive it, the temp slowly creaps up. Around town it will run 186-193ish except for hills, it will get to 210 sometimes, but when I get on the highway, or exceed 50mph, it will increase. 200 to 203, back down to 200 for 5 seconds, then up to 203 again. And continues to do this from 203 to 206, 210, 213, etc. It seems like once it gets to a certain temp, it just gets worse. Almost like it looses water, because after it overheats, I've got to add a decent amount. When I get off the highway, it will run 223-229 unless sitting it will go up.
This problem is getting extremely bothersome. I'm trying to sell the car, and I can't very well do that with it overheating. Any ideas?
I thought it might be beneficial to know that I took the front bumper off, and it would run 206-219* on the highway, but never really got hotter than that. But when I put the bumper on it will get hotter. Even after the ducting.