thanks... I'm going start watching it more closely, but the problem is I don't put a lot of miles on it... since it's not overheating I may have to take a short road trip and see if it shows more...
Coolant Leak... strange but true
- Thread starter Macfluke
- Start date
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Have you done a radiator pressure test with a pressure tester. If there is a leak, this will make it show. Don't have one ? autozone will rent you one for free. You have to buy it, but will get a full refund when you bring it back. They will take your debit card.
Yes, it's been pressure tested twice with no leak showing up yet...
Did the pressure bleed off after a few mins? How much pressure was it pumped up to? If the leak is that small. have you thought about using some cooling system stop leak. Alumaseal is the best stop leak there is, just FYI
I took it to the shop both times, the first time I watched but didn't look at the gauge but he left it pressurized for awhile and the second time I didn't watch but both times no leak was found. As for the Alumseal i'm going to hold off on that because I want to find out whats going on, this problem really has me curious... I did use Alumseal on a Mustang radiator leak I had years ago when I was low on funds and it worked. thanks for your input...
delta_p
OBS Chevrolet, When Silverado Was A Trim
I had this problem on my '96 C1500. Could not determine where the small leak was, but could smell coolant.
It was the reservoir tube where it connected underneath the coolant reservoir. found it would drip and run onto the frame of the truck and wouldn't reach the ground. Leak would stop after while when parked.
It was the reservoir tube where it connected underneath the coolant reservoir. found it would drip and run onto the frame of the truck and wouldn't reach the ground. Leak would stop after while when parked.
someotherguy
Truly Awesome
Please don't add any type of "seal" junk into the system, you'll just regret it sooner or later.
When you're doing the pressure test, are you doing it after the engine has cooled down enough to safely remove the cap? If so, it may be that the leak only "opens up" when the engine is hot. Not directly suggesting you do a pressure test on a hot engine as there are obvious risks involved there, but just wondering..
Richard
When you're doing the pressure test, are you doing it after the engine has cooled down enough to safely remove the cap? If so, it may be that the leak only "opens up" when the engine is hot. Not directly suggesting you do a pressure test on a hot engine as there are obvious risks involved there, but just wondering..
Richard
I'll take a look there... thanks
no worries about the sealer, i'm letting this delvelop... it was pressure tested both times hot... thanks Richard
ima93chevyguy
Zip-Tie Mechanic
Sounds kind of like when my intake was leaking. Didn't know what it was until it started to pool up. Would lose coolant ever so slightly until it got worse and I resealed it.
Also did you check the water pump real well? My weep hole leaked really iffy for a while like that.
Also did you check the water pump real well? My weep hole leaked really iffy for a while like that.
Another thing to consider since it's not showing any leaks during the pressure test would be the radiator cap. I swear I saw something about this posted here recently. Same situation, no leaks under pressure during the test but would leak a little while driving. He replaced the cap and the leak disappeared.
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