Tahoe 02 went in to havve a gasket manifold seal replaced, two weeks later i am smelling coolant in the cab. there is some residue near the water pump. the techs are saying they can find anything so it may be leaking from under the dash...i seem to think this is related to the repair from a couple of weeks ago...their wrench was still even under the car hood from the repair! please help
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
I'm not taking sides in this. So what I am going to say is more or less neutral. There is a big possibility you damaged the head gasket when the engine overheated last week. The dealership would have no way of knowing this if it was not yet leaking into the engine when they replaced the water pump. Once the water pump leak was fixed, the system would be running under normal pressure which could finish off the weak head gasket. You can not see a damaged head gasket without removing the cylinder head. And you have two heads with two gaskets. So, IF the head gasket is now blown there is a good chance they did not know it last week. It could also be a cracked cyl head or leaking intake manifold gasket. Or all of the above.
I will assume as usual that it has the 5.7L engine. The common cause for a coolant leak in these truck are the intake manifold. It either leaks externally or internally or both this is a common problem with this engine. You have to replace the intake gaskets. This a fairly big job. First check your engine oil if the level has risen and if the oil smells like anti freeze or looks like a milkshake kinda foamy then the chances are good that your intake is leaking.If all else fails you will have to do a coolant pressure test and you will seee the leak probably.It could also be your cylinder head gaskets but the most likely cause is the intake gasket. $100.00 for the gasket kit and about 5-6 labour. Change your oil & filter before you start it after you replace the gaskets. Then if your leak goes away change your oil & filter again about a week later to ensure you get all the coolant out of the engine oil this is very harmfull to the bearings in the engine.
CHECK AROUND EXHAUST MANIFOLD AROUND THE ENGINE LOOK FOR OIL LEAKS AROUND VALVE COVER GASKET AREA LOOK FOR COOLANT LEAK ON EXHAUST MANIFOLD.CHECK FOR OIL LEAKS ON FRONT SEAL ON CRANKSHAFT TIMING COVER.
Honestly, if you are smelling coolant in your cab, 9 times out of 10 the culprit is the heater core or a lin in the cab going to the heater core. A coolant line going the the intake would come directly off of the radiator if I'm not mistaken, which is in the front of the truck... and further away from the cab. Instead of using a paper towel, smell the carpet. If you have pets don't let them near the carpet. Anti freez has a sweet taste but is VERY deadly.
It's possible that the heater core is on it's way out but not completely failed, or there could be a leak that only occurs under high pressure (like when your on the interstate).
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