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Re: 02 tahoe water pump coolant smell to thundergod
Check a private shop out by asking around and seeing what people that
have used them think. There are only a few manufacturers of heaters,
and Just about every car company outsources them. The reason that the
job is expensive is that nearly the entire dashboard needs to come
apart to remove it. (in my opinion the engineers are morons...old
designs were far more easily serviced except for corvette...one took me
13hrs to do and I swore I'd never do another one!!!) When actually
doing the job, close attention must be paid to all electrical
connections for everything in general and servo "motors" that operate
the heater doors. I've often seen a core replacement result in
ancillary electrical problems if it's not done carefully. In the
financial bind most dealerships find themselves in , most are trying to
"wring" every dollar out of every job...Find a good private shop with a
good reputation and techs that don't double talk or evade your
questions and you should be fine. NO peppy boys or "discount" chain
shops...they just can't do this work.
With the miles you stated, attention needs to be paid to routine
service, with an eye to leaks, noises "odd " things you see and hear.
It appears you are doing this already. Just keep it up.
I do a "look around" every few weeks and coupled with the use of synthetics, get over 350K out of everything I own.
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Is there coolant leaking inside the car? Check the floor under the passenger side dashboard. If the carpet is wet your heater core is leaking.
If the floor is dry check the coolant elbows going from the block into the automatic belt tensioner. That's inside the engine compartment. They are notorious for leaking. You may not be able to see the leak because it drips onto the block and evaporates. That's what the smell may be.
Search google images for "3800 series 3 coolant elbow" to see the part I am talking about.
The only way to find a coolant leak is to pressurize the cooling system. You can rent a coolant pressure tester from an auto supply store. Pressurize the system and look for leaks. You may have a leaking water pump.
The elbows can be purchased from the dealer. The water pump you can get from an auto supplier. Might as well change the thermostat while you are doing the other repair. Drain the cooling system and refill with fresh dex coolant.
Make sure you bleed all of the air out of the system or the car will overheat.
The divider is generally not sealed at all, just a lump of metal reinforcement, the coolant may have pooled at the rear. The water will evaporate from the coolant mixture but the coolant will stay a long time so it'll have to be vacuumed out, add water and vacuum some more to pull it from the carpet and padding as much as possible. You can verify whether it's coolant or just rainwater by smelling the carpet. You may be nose blind to it by now from driving the car so have someone else sniff the carpet if you don't detect any coolant smell yourself. It'll also feel more slick than straight water if it's coolant so that's another way to ID the liquid. Option three is a cat or dog, they'll likely try to lick it if it's coolant but don't let it clean the carpet for you unless you dislike the animal.
Coolant is oil based. The oily mess in the overflow could be very old coolant. Or it could be engine oil from a leaking head gasket. The rusty stuff on the floor inside the car could be from a leaking heater core.
Does the car have climate control air/con?If so,air/con may still be coming on at different times.I would double check the air/con drip tray.Sometimes it has 2 pipes if the tray has split levels.One may still be blocked.(Does the car have a built in fridge?)Hope this may help
Probably not. Residue on the passengers side rug is likely either from a leaky heater core or a blocked air conditioner evaporator drain. Is the residue slippery feeling? Does it have a sweet anti-freeze smell? If you blot it up with a white towel, does it have a color?
If it is colored the same color as your anti-freeze (green, orange or pink, depending on what type your tahoe uses) and has a sweet smell, my bet is the heater core is leaking. This would also cause fogging on the windshield when using the front defroster and a sweet smell from the air vents when the heat is turned on.
If it just seems like water and seems to get worse when you use your air conditioning, it is likely a blocked AC evaporator drain.
In any case, neither of these problems are likely to be related to an intake manifold job.
Statistacally--most leaks come from sunroofs and yes they can be one side or the other. Happens from clogged drains. Sunroof drains run across the headliner and down the a-pillar. you can have them cleaned and checked. This is all assuming you have a sunroof. Hope I helped. Thanks.