Ok, I've got a weird one, semi related. Have a 85 60 with rebuilt motor, bad rebuild requiring head to be reworked by reputable shop. 7000k miles since second round on head. Wasn't aware of slow coolant drop that caused a quick overheat. Temp gauge pegged. Pulled over to cool, limped home 10 miles home. Next morning no visible leaks. Replaced thermostat and sender unit. Flushed coolant and ran on incline many times with burp funnel. Engine runs fine, yet temp is hovering on the high side. IR gauge reading 180 at thermostat manifold. Compression test 1 - 145 (plug clean), 2 - 135 ( fouled ), 3 - 135 ( fouled ), 4 - 140 ( fouled ), 5 - 135 ( fouled ), 6 - 150 (plug clean). Loosing a little coolant, inch in overflow every 300 miles. Does anyone think the head needs to be retorqued and valves adjusted??
