I just got through putting my car back together a couple of weeks ago. I just got back from a short drive a few mins ago. I decided to pop the hood and look over a couple things. When I popped the hood I noticed antifreeze on the passenger side of the engine bay. It wasn't much but it was on the battery and the ac hoses and little on the fan shroud. Couldn't find any leaks. I suspect a radiator cap. What do you guys think. All hoses are tight including the over flow. Any advice or answers would be welcome.
Thanks in advance

 

As in you did a complete engine rebuild? just had the engine out and reinstalled? Or something else?

If the cap is old, replace it regardless as it is just good maintenance to do so and would eliminate the issue.


I'd pull the overflow line off and check it for blockage and pinholes. If you can remove it without taking the clamp off the hose is too worn at that spot likely. I noted mine looked mushing at the rad connection after I removed it.

But the best bet is to drive it again and pop the hood and check where it is coming from. It could be a rad hose, a heater hose, pin hole in rad and fan is spraying it etc.
Look inside the rad shroud and bottom side of rad too.
G/L

 

No not a rebuild but had the engine out. I drove it 60 miles the other day and no problems. The cap and radiator are under 3yrs old and the car has only seen 5000 miles since the radiator was new. I looked at the over flow hose and it appears in good shape. I did add some royal purple purple ice to the cooling system about a week and a half ago.

 

Hairline crack in overflow bottle? Is the bottle cap still venting through?
Tstat housing leak?
Maybe just a fluke, but I'd keep looking for the answer.

 

Going to replace cap first. I just removed the cap and antifreeze was up around the top of the cap. If they're working correctly you usually won't see that.

 

Any chance it's from the A/C system instead of being coolant?

 

Nope its for sure coolant. I found the crack in the overflow bottle.

 

Glad you found it.

 

me to