aigoo

actually, driving around for a while it stays at normal operating temperature. after a while, it just starts to rise steadily to the H, and past it. it happens pretty quickly. any ideas on how to check the sending unit? as for the coolant lvl, there's no cap on the radiator itself lol. only cap i see is on some tank, and when open, it's full. thanks again!

cap is hot! im assuming waterpump, perhaps? i hope not =D

I just picked up my 95 SC400 a couple of weeks ago with only 65000 miles on it. It was driving perfectly until yesterday when the car started to overheat. The temperature hits the H in the guage. Any suggestions on what could cause this? It just sort of came out of nowhere. It never overheated before, up until yesterday. The only thing I did to the car was install some new speakers, and i'm sure that it wouldn't cause my overheating problem lol. Any insight would be appreciated =D