Howdy! I just replaced my radiator and thermostat on my '97 CRV (175k miles). After reconnecting all hoses, fans, the thermo ground, and the battery, I test drove and had no problems. After it sat in the driveway all night, I tried to drive it again; this time the engine would not turn over all the way and the oil/check engine/battery lights all came on (just like a stall). There is a small leak between the upper radiator mount and the engine which I plan on sealing tonight, but I wouldn't think that'd cause the problems I'm having. If anyone has experienced this or knows what's causing the engine to not turn over, I'd appreciate any advice. Thanks in advance!

Update: I double checked the thermo ground - it was solid. I then drained most of the coolant and and tried to restart (briefly) - Presto! It turned over no problem. Any idea what this means? Could it be the head gasket?

 

Thermo ground?

 

Yes - I made sure it was screwed back in the top of the thermo cover. Also, would the car work last night and then quit if it was the thermo?