1992 Dodge Stealth R/T Twin Turbo
I've been pulling my hair out trying to find a pretty significant coolant leak for about a month. I've replaced the thermostat, coolant temp sensors, and radiator cap recently as they were all cheap and aging parts. I've learned that I only lose coolant if I put the car under moderate to heavy load. It doesn't have to be WOT, but any time I go for a more sporty drive over 20 miles I lose nearly a half gallon of coolant. If I baby the car and keep the RPM below 3000 I do not lose any, or only lose very little coolant. There are no apparent leaks anywhere on the car and no puddles form. The car also does not lose coolant when it is not running. I can usually go for about 20 miles before my temp gauge starts jumping up and down from air being in the system / loss of coolant. The top radiator hose feels super tight and is almost ballooning when this happens. I think I'm going to come to the conclusion of a head gasket issue, but I have no coolant in my oil, no smoke from my exhaust, and the car only has 42,000 miles. You'd think a head gasket would last for at least a good 100,000 before it gives out. This almost seems like the symptoms that some have had with head lift, but my car is completely stock and not pushing high boost. Before I blow even more money, is there anything else this could be before I buy a combustion leak test and pressure tester?