So I dropped a thermostat housing bolt somewhere in the engine bay.... I can't find it after picking around with a mirror and magnet for 2 hours. So I'm in the market for a new bolt. Anyone know what size they are? My truck is a 97 with the Itty bitty 5.2

 

I THINK it's 9/16

 

I used a 13 mil socket but I was more concerned about threads and length. But I was able to get a bolt off a scrap truck in the yard at work. So all is well. Hopefully it seals up this time around.

 

Glad you got it together!

 

I have the same year and model, and I'm not sure on the thread count or shaft size, but the head was a 1/2".

 

Old thread but I'm fairly certain they're 5/16-18