Rad boiled over!
Posted: Sun Feb 01, 2004 11:21 pm
Hmmmmm..............Here's what happened:
Finally put my carb back together and installed it on Frank, my '67 Loboy.
Fired right up and sounded great. Took it out for a spin, about 1/4 mile and back to the shop. Just as I got there the rad started to boil over, shut it down and pushed it into the shop. I'm about to rebuild and paint this one so I set about to find out why it boiled over. Before draining the rad, I felt the lower pipe to the engine block, it was cold. There was anti-freeze in it, and the shop has been warm for 3 days so it was not froze. I started to remove the drain plug and was getting ready for hot water, but no, the water coming out was cold, very cold, then started to get hot as it drained out. It was almost all out when I felt the lower pipe again, this time it was very hot. It's almost like there was a blockage, and half the water was cold and half was hot. I removed the rad, the head, the lower pipe, and the short pipe to the steering bolster, NO blockage anywhere, and suprisingly clean. The head gasket shows some sign of blowby, and possibly getting into the water jacket but not sure. Any idea why it would boil over with no blockage? The cylinder walls are not scored, but will need to be de-glazed. The rad itself is not plugged either, as I plugged the top pipe and over flow and was able to blow through the rad with no effort at all. I'm stumped.
Finally put my carb back together and installed it on Frank, my '67 Loboy.
Fired right up and sounded great. Took it out for a spin, about 1/4 mile and back to the shop. Just as I got there the rad started to boil over, shut it down and pushed it into the shop. I'm about to rebuild and paint this one so I set about to find out why it boiled over. Before draining the rad, I felt the lower pipe to the engine block, it was cold. There was anti-freeze in it, and the shop has been warm for 3 days so it was not froze. I started to remove the drain plug and was getting ready for hot water, but no, the water coming out was cold, very cold, then started to get hot as it drained out. It was almost all out when I felt the lower pipe again, this time it was very hot. It's almost like there was a blockage, and half the water was cold and half was hot. I removed the rad, the head, the lower pipe, and the short pipe to the steering bolster, NO blockage anywhere, and suprisingly clean. The head gasket shows some sign of blowby, and possibly getting into the water jacket but not sure. Any idea why it would boil over with no blockage? The cylinder walls are not scored, but will need to be de-glazed. The rad itself is not plugged either, as I plugged the top pipe and over flow and was able to blow through the rad with no effort at all. I'm stumped.