Hey, I check my anitfreeze after i turn my car off and there is none in the box for it. The car has been running fine for over a year now though. I put in the sand looking stuff to seal any leaks but i think it only worked for a little while. Whenever i turn my car off i hear a loud gulping noise under my hood right where that box is. What is this? i add antifreeze every now and then when i remember. My temp gauge usually stays the same so it doesnt seem like the truck is overheating. I dont want it to creep up on me one day that my engine is screwed though

Any suggestions?

it should be in my sig but my truck is..

1994 Chevy s10 blazer tahoe ed.
169k miles on engine
Auto
4x4, ( but doesnt work though, elec switch)
4 doors

Thanks guys,

 

It sounds like you have a leak and once your reservoir gets empty, it sucks air in, thus the gulping sound.