Engine Cooling problem
1999 Isuzu Bighorn 6 cyl Four Wheel Drive Automatic 85000 miles
Today I was driving my Bighorn up a snowy hillside in low range 4x4, it was very slippery and I got to the point where the wheels were spinning and I was no longer moving forward, I persisted for about 10 mins and then stopped to have a walk around. When I got out I noticed a boiling noise coming from under the bonnet and when I checked the coolant was boiling and spitting out of the overflow tank and spilling onto the ground. I then reconfirmed by putting the key back into the ignition and sure enough the temp gauge was in the red. I left the hood up for around 20 mins and the engine cooled down (I am living in Mongolia where it is - 25deg C outside) and the gauge went back to the half way point so I drove home. The engine temp remained at the half way point for the whole trip home and showed no additional signs of problems. While I was waiting for the engine to cool down I noticed one particular moment when there appeared to be a masive amount of pressure coming through and all of the hoses shook, something passed and then is settled down. Any suggestions, ideas would be greatly appreciated.
Saturday, January 23rd, 2010 AT 4:23 AM