Question about 2002 Chevrolet Tahoe
I know this its a slow leak and I know that I dont have a crack in the tank. I've ran the tahoe for 1 hour parked and no leak and drove through the neighborhood and highway 1 hours. turned it off in my drive way, checked it every 10 minutes see if anything leaked from it for 2 hours and nothing appeared to leak from it.
ALSO I know it is a leak because i filled the tank to the marker and 3 days later the low coolant light came on. i checked to see if I cross threaded the cap and it wasn't. there was roughly about a quarter left of coolant in the tank.
The brand of coolant i use in the Tahoe is: Peak 50/50 Antifreeze and Coolant. (Blue Bottle) if it helps any to know the brand i use.
CHECK YOUR oil and see if it is milky there have been some issues with heads cracking on these. another option is to have dye added to cooling system and drive a few days then have checked with a blacklight the dye will glow this can help spot a small leak
Posted on Jan 26, 2009
I gotta disagree that these model's dont leak as i have replaced about 20 of them in my lifetime, so they do leak, but if he sees nothing hitting the floor, or nothing smoking from under the hood, somehow or another the cars eating the engine coolant, weather it be head gasket or pouring out the overflow when hes driving, but that would cause an immediate overheat, i would pull a plug and check to see if you see any discoloration on it and itll let you know if your buring the coolant
Posted on Aug 05, 2009
Has there ever been a time it ran hot like during the summer? Worst case senero, (and i mean worst case) could have blown head gasget, at a spot where it runs into a combustion chamber and going out the exhaust, very small and most likely won't overheat in this kind of weather (if you live in a cold climent) but might show up when summer comes. if you know what antifreeze smells like, let it idle and walk around to the back of car by exhaust pipe and smell for any hint of antifreeze. now if you don't smell anything witch you may or may not, let it set all night and in the morning before you start it open hood and look in front of engine where the intake meets the head and block, they have been known to leak coolant there, it can leak in the back of engine, but most generaly it will be in the front where i said, also after you have chk. under hood. start it up and then go behind car and smell, if your going to smell anything thats when you will smell it because it sat all night and if its leking into cyl.it had all night to do it. the reason you don't see any thing on the floor, is its such a small leak engine heat will evaporates it before it reaches the floor. hope this gives you an idea what to look for. OLD.SCHOOL.
Posted on Jan 26, 2009
There is a small hole under the extension behind where the pulley is mounted, most times barely visible. If you see any coolant there the pump seal is leaking. Many times it will show up better with the cap off, as internal pressure can sometimes push the seal against the shaft and temporarily stop the leak. If any coolant is found there,(sometimes it will run down the lower hose and appear like a bad hose or clamp) the pump needs to be changed. No, it is in no way related to a manifold gasket leak.
Posted on May 28, 2009
Chevy as most GM cars usually needs Dex-cool antefreeze
But Peak is OK as it can be used to top-off any color of automotive antifreeze including green, yellow, orange, fuschia, blue and red
More info here
Also check the system for leaks. If you need to add coolant at least once a month there is a leak.
Posted on Jan 18, 2009
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