I significantly overheated my new car on the way home with it when the water pump blew. It still seemed to start and run fine when I moved it off the tow truck and onto my driveway. I just got the new water pump installed, and while doing a citric acid flush, I noticed the upper hose was pretty hard, I let it cool and it was still kind of hard, I might just be imagining it since the engine was still pretty hot, and I have no idea if citric acid will release any gases while its in there... Anyway.. what are the signs of a blown headgasket? And if I have one, how much is it going to cost to fix it? (parts/tools only).

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Ich liebe meine Autos!

1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot

Excessive speeding? It ain't excessive till I redline!