1986 Dodge Daytona Shelby Z: at about 110,000 miles the temperature gauge started wildly fluctuating between hot and cold. New sending unit and thermostat didn't have any effect. (and about 5 minutes of labor...the "front" side of that engine was so easy to service) Diagnosis: cracked cylinder head. Sure enough #4 had a tiny crack between the intake and exhaust valve. Reman cylinder head was about $200.
Turbocharger was noisy after that. Like a circular saw running under my hood. Located an Dodge 600's turbo at a wrecking yard.
At about 120,000 the engine began to knock. Like someone beating on the side of the block with a ball peen hammer. Faced with the possibility of having to tear it all apart again for a shortblock and tired of dealing with having a black car with T-Tops and a black leather interior and no A/C in Texas I let it go for $500 towards a 1984 RX-7 with only 60,000 easy miles. Still had the factory tires on it. Plenty of tread.(no hard acceleration or cornering)
I had the RX-7 long enough to put new RWLtires on it, Change all the belts, plugs, and fluids, and have a rotary shop go through the carburetor and work the secondaries. Man that was a sharp little screamer
The RX-7 was stolen. I got a call from the police that said they had located the car. Went to the impound yard and found the rear shell of the car. No engine, no transmission, no hood, no doors, no glass, no interior, no rear end....nothing but the dash and uni-body. Completely stripped.