New to the site, but not new to Land Rover's. I just started having a cooling problem with my '97 Disco. Several weird isssues going on, but those are common with Land Rovers. First off, yes, head gaskets are leaking, both. I assume these are letting exhaust gases into cooling system, because hoses seem pretty hard, they are new, just replaced. Was driving home today, had heater cranked to high, never did get real hot, but about 3 minutes into the trip, water temp gauge went all the way to hot. I pulled over and it went quickly back down to normal, and stayed there for the 10 minute drive home. I'm trying to figure out if I want to do the head job myself, or turn it over to the pros. Does everyone think that the head gaskets are the only source of my problems? The spiking of the temp gauge makes me think thermostat? Any help would be appreciated. Thanks.