2000 5.4 overheating
Well, we ran a pressure test at the dealer. No pressure drop in 3 hours. I drove the truck 30 miles on day 1, no problem. Day 2 drove 6 miles, parked. no problem. On the return trip, at 3 miles the temp gauge was pegged, oil light came on for 30 seconds and temp gauge dropped to normal. I drove it home. I could smell anti-freeze, so I popped the hood. Upper rad. hose was rock hard from pressure. I opened the reservoir it released slight pressure and the coolant drained away from the reservoir. I haven't driven it since. Any ideas? I found thoughts that if you place the intake gasket that the intake should be replaced as well. Could the intake still be leaking into the #1 cylinder and causing a lack of coolant?