wicked383lt1

Well guys I've been working on this for a while now and can't figure out how to fix this issue. It all started out when I swapped the radiator and installed a lt1 style radiator. It's a new radiator btw. So I thought it was air bleed out all the air and still have the same issue. So then I swapped out the thermostat and the radiator cap. The water pump is new from the swap. Giant figure out what's happening?

chrysler kid

iTrader: (14)

What issue is it having.

wicked383lt1

Sorry about that, when I'm in traffic it runs at 185° but on the highway it goes up to 210°. As soon as I get off the highway it troops again.

chrysler kid

iTrader: (14)

Well some things to check for, the first would be to check for any leaks using a cooling system pressure tester. It's possible you have a leak at full pressure (when driving) that does not appear at idle.

Rent a cooling system pressure tester and see if you are holding a steady 15 psi coolant pressure with the system pumped up

LS6427

iTrader: (2)

If you run cool all the time in city.....then overheat on the highway......Sounds like a ram air issue. My LQ9 runs almost too cool on the highway at a steady speed of like 65-70mph.

Is your lower front air dam ok...?

Is there anything stuck up in front of the condenser?

Any work been done lately up front anywhere on the car?

.