Date registered: Apr 2006
Vehicle: W111 Coupe
Location: Washington DC
Mentioned: 1 Post(s)
Quoted: 19 Post(s)
Well, I realized I had a problem by hearing a hissing sound while driving down the road. I looked at the temp gage and it was pegged to the maximum. That's an awful sight. I pulled over, popped the hood up and steam was coming out of the rad overflow at a very high pressure. Hoses were also under very high pressure. I immediatly thought I had blown a head gasket. Checked the oil, normal color, looked into the rocker arm cover throught the oil filler, no mayonnaise there either. I waited the engine to cool a bit then started it again with no problem and drove up to the next fuel station. There I added one gallon and a half of water. I started the engine and there was no pressure in the circuit, no bubbles coming out. So I went on driving and temp stayed OK for about two hours before rising again. I stopped again and this is when I notoced the leak.
Since then I've poored a leakstop I got at Autozone. I drove 50 miles and the level did not go down, and it's not leaking anymore. I wonder how long it's going to last. I may tempt the trip, but I will take my spare water pump with me. I'm going to fit a 5.0 M117 soon in that car so I don't want to start spending money on that engine now. Hopefully the sealant will last up to the swap.
Last edited by GGR; 08-16-2010 at 05:37 AM.