blue89

I'm having to fill my radiator up with coolant about every 5 to 10 days. I just get a low coolant light. So I top it off and I'm fine. but I have strange symptoms: Like sometimes the Temp gauge fluctuates and will go up to the over heat mark but then come back down.
Now could it be I'm leaking somewhere and I just cant see it? I checked my waterpump weep hole and dont think its leaking. I havent gotten underneath the stang yet with a flash light to really check it thoughrly. If its a heater core leak then where would i check for leakage, under the dash or what. Any pointers would be helpfull.

Obsol3te

Place a piece of cardboard under your engine compartment on the ground one night.
Check for spots, that'll atleast give you an idea of the general area of where it could be leaking

bluepony1

check for coolant in the oil or oil in the coolant overflow could have a bad head gasket is the car puffing out lots of white smoke out the exhaust ,start car put hand in exhaust then smell hand do you smell burning coolant if so you have a blown head gasket

mustang8719

If it was the heater core it would be leaking out of the firewall on the passenger side.Mine used to weap coolant from the seam on the side of my radiator.You should be able to find it pretty easy coolant doesn't evaperate.

blue89

I dont have any coolant in the overflow. I checked the oil already. It looks normal. I need an oil change though. If there is coolant in the oil whats it look like? I checked my exhaust pipes. I do see some white smoke but not alot. I havent smelled the exhaust yet i will do it tonght. Thanks for the input

mustang8719

If you have coolant in the oil should look like Choclate milk.

ho85GT

the heater core can leak from under the dash on the passenger side, but it would be really visible

sykopafikjuggla

i also have a coolant leak mine is coming from the heater core. turn your heat on after your engine warms up... if smoke comes out its prolly the heater core. I bought prestone radiator selant. i used one bottle and it really didnt do anything and then i bought a second bottle and voilah.. no more leaks. it runs perfect and no leaks... i love it.. yeah i do. try it

91hatchgt

It is probably not a good sign if you don't have any coolant in your overflow!! Check your water pump too, how long has it been since you got a new one of those?

blue89

It's the origionall waterpump with over 125,000 miles on it. I checked for puffing whit smoke but didnt see any. The oil is okay, dosent look murky or anything. Needs further investigating but I think its the water pump.