Check to see if there is foam on the oil dipstick. If you are blowing radiator fluid into the crankcase, could have serious engine problems.
Could also see this when oil is drained for an oil change.
HI. This issue has many causes. i will list the most common causes below.
Coolant consumption::: Possible causes______
1. Check the head gaskets. The gasket may be leaking.
2. Check The Intake Manifold Gasket. This gasket may be leaking, worn, or damaged
3. Check the cylinder head for worn or scorn cylinder block.(This will require total breakdown of the engine)
4. Check the water pump seal for leaks as well.
Now that we have covered the basic check points for coolant consumption, i would advise to concentrate on the head gaskets if there are no apparent leaks on or around the engine itself. If the head gaskets are worn, the leak can be introduced to the engine internally, causing the engine to burn off the coolant. this is noticeable by removing the oil cap, after a hard drive. you Will notice steam that will escape the head as soon as you remove the cap. If this is the case, your problem will be with a failed head gasket.
IN a severe case, you will notice white plums of smoke escaping from the tail pipe during acceleration.
If this engine has the water running through the belt tensioner (like the 3800 series II V6) then look for one or two plastic pipes connecting it to the engine. When the engine is running, see if you can spot dripping water (you will probably need a mirror). If the leak is slow, you won't see any water because it will evaporate on the hot engine. It costs about $5.00 for the parts and takes about 2 hours to change. I had this probable before.
SOURCE: 2001 jeep grand cherokee. no leaks losing coolant,
Most serious item I see is oil pressure. Put a mechanical gauge on the engine and get an accurate reading. Also make sure that the passage to the sender isn't blocked. If you did the pump yourself, did you find any coolant in the oil? In 99% of all low oil pressure situations, the oil pump has not failed. Rather, either a cam bearing or crank/rod bearing is worn. You do not have to have one spun or completely worn out bearing. Even wear of all bearings that is somewhat excessive can bleed off enough pressure to cause problems (plastigage the engine bearings to determine wear).
As far as coolant loss. A cylinder head gasket can fail between cylinders, into a water passage, into an oil passage or any combination of those and externally as well. The cylinder heads on engines beginning in about '98 are prone to "micro-cracking" which can lead to all kinds of hard to diagnose coolant loss problems. It may help if you have a shop do a dye test and a hydrocarbon test on the cooling system and see what they find.
I have seen several kinds of block sealing systems available. Though I generally do not recommend them, as the longevity of the repair isn't predictable, you could try that as a option of last resort.
There is no quick easy solution to your problem but with a bit of "poking around" you may be able to cure it. Don't bother repairing one problem before finding out what the other one is first though as together, it might be smarter to replace the engine.
SOURCE: water leaking trough footwell vents and losing coolant
This sounds like your heater core needs changed.
SOURCE: I'm losing coolant at a pretty fast rate. Seems
Most likely cause is either a leak in the seam on the radiator or a leak in a cooling line at the bottom of the radiator. Best course of action is to wipe down any wet surfaces and get under the truck to check the cooling lines first. If (while truck is running) you see no seepage from the cooling lines, you'll need to remove the shield to check on the radiator itself.
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