OIL IS SHOOTING OUT OF THE DIPSTICK FROM THE OIL PAN.

You do not indicate a specific vehicle, but in general, the oil dipstick tube goes into a hole in the engine block itself or the oil pan. It is usually down low, so the dipstick can go almost to the bottom of the oil pan.

it fills through the dipstick tube, with engine running,

Depending on the car you have, this might be normal, as usually some models require to check the oil when it's hot, but engine off, others require the engine to be running. Each manufacturer has specific conditions and though they are similar, they usually are not quite the same. So read the owners manual carefully, or call up the dealer and ask them to be sure. If your model is meant to be checked while running and shows no oil on the dipstick, then probably the tranny's oil filter is clogged and not allowing a good oil return flow. Could also be a clogged oil cooler. Either way you will need to drain the oil from the tranny to be able to examine the oil filter located inside the pan, or the oil cooler located up front near the radiator usually. Best way to test the cooler for cloggin is by shooting some compressed air into it and check if it comes out ok on the other end, or if it seems to have less pressure coming out, or even giving you a hard time to hold the hose in there while shooting air. Although be careful if doing that, cause there will still be some oil in the cooler and shooting air in there will spatter oil all over the place, so get a rag or bucket handy to collect the oil and not get it all over the walls :P

Since the dipstick tube is a slide in fit, you will need to drop the oil pan to work the rest of the part out.
1) drain the oil
2) remove the bolts holding the oil pan (once they are all out, you might need to tap the pan to get it to release from the block-my brother's 97 camry was like this)
3) Remove the pan and look up for the dipstick tube end, spray it good with some WD-40, let it sit for a few minutes. The photo shows some pretty bad corrosion in your case.
4) with a set of channel lock pliers, begin to work the tube out. Take your time, you will be pushing out, not trying to pull the piece through.
5) once it is out, clean the edges of the dipstick tube opening.
6) Install new dipstick tube. ensure you have a good fit around the tube. otherwise, the crankcase pressure will squirt oil through.
7) Scrape off the old gasket from the oil pan and the face of the bottom of the engine.
8) lay the new gasket on the oil pan and begin to bolt it back on. Get the bolts in finger tight, then alternate torquing them down to ensure an even seal.
9) change oil filter and fill with new oil

I would look for other leaks. If you are sure it's leaking at the dipstick tube, there is normally an o-ring where the tube presses into the engine. In general, this is an odd place for a leak, as ther eshould be no oil pressure in the pan (where the tube terminates) and unless the engine is overfilled with oil, the tube end shouldn't be immersed in oil to leak. IF there is pressure in the oil pan, that generally indicates bad rings. I have seen engines where the oil dipstick actually pops out of the tube under pressure when the engine is running due to pressure in the oil pan from blow-by at the rings.

Changing the oil in a Hyundai Sonata is an easy task that should be performed every 3,000 miles. Follo the below steps to change the oil on your Hyundai Sonata:
1) Ensure the car is parked on a flat surface. Place a drain pan under the engine. Locate the oil pan directly under the engine. The oil pan will be at the very bottom. Now, unscrew the drain plug at the front of the oil pan with a socket wrench. Allow all the oil to drain out into the oil pan. Tighten the drain plug back into the oil pan with a socket wrench.
2) Locate the oil filter in front of the engine. There will be a cut-out in the protective shield where the oil filter is located. Unscrew the oil filter with a strap wrench. Allow the oil to drain into the oil pan. Place the old filter in with the waste oil.
3) Fill the oil filter with fresh engine oil. Screw the filter on to the filter housing by hand. Do not wrench tighten, which could strip the threads of the filter or filter housing. Open the hood for access to the engine compartment. Unscrew the oil cap on the top of the engine.
4) Pour in three quarts of engine oil. Pull the engine oil dipstick out of the dipstick tube and wipe it clean. Push the dipstick back into the dipstick tube. Pull back out and look at the engine oil level. If the oil on the dipstick does not stop between the two marks on the dipstick, pour in a half quart of oil and check the level again. Do not overfill.
5) Start the car and allow it to run for few minutes. Turn the car off and check the oil level once again. Add another half quart of oil if necessary. Ensure the oil cap is back on the engine and the hood is closed. Hope this helps and if you need any parts for your sonata, this site looks like it has cheap prices, free shipping and great reviews http://www.buyautoparts.com/carmodels/Hyundai/Sonata.html

Hi Michael, Check the Positive Crank Ventilation valve for blockage. If it is working have a compression test carried out on each cylinder. If one or more show a low reading suspect the piston rings. Regards John

Hi. You might need to Replace the oil pan gasket is the oil is leaking. Here's the procedure on how to Replace the oil pan gasket.

1. Jack up the front end of the car and slide a jack stand under the vehicle. Make sure the jack stand is securely in place, and then put blocks in front of the rear wheels to keep them from rolling.

2. Slide under the car and put a drain pan under the drain plug of the oil pan. Loosen the drain plug with a socket wrench and allow all of the old oil to drain into the pan. Remove the old oil filter.

3. Disconnect the negative battery cable and remove the dipstick and its housing. Remove the collar on the rear of the oil pan. If the vehicle is equipped with engine oil cooler lines that lead to the oil pan, remove them as well, along with transmission oil cooler clips.

4. Remove the bolts holding the oil pan, and carefully remove the oil pan. Remove the old gasket. Scrape it with a putty knife if necessary, but be very careful not to scratch the surface.

5. Wipe out the oil pan with a clean cloth or paper towel, and wipe the joining surface of the oil pan with cleaning fluid or solvent. Apply a thin bead of automotive sealer and install the new gasket.

6. Replace the oil pan, tightening the bolts securely. Replace the transmission oil cooler clips, engine oil cooler lines, oil pan collar, dipstick housing and dipstick, and reconnect the negative battery cable. Install a new oil filter.

7. Take the car off the jack stand and fill the engine with the appropriate amount of SAE 10W-30 or SAE 5W-30.

All the best!

Hi. Here's the procedure on how to change the oil pan.

Things You'll Need:
Drain pan
Crescent wrench
New oil filter
Oil filter wrench
Socket wrench
Socket set
Razor knife
Putty knife
New oil pan
Oil pan gasket
6 qt. of oil
Clean towel

Draining the Oil
1. 1 Locate the oil pan directly underneath the engine. The oil pan will be held on to the bottom of the motor by 16 to 18 bolts. The drain plug is at the bottom of the pan.
   
2. 2 Loosen the drain plug with a crescent wrench. Allow all the oil to drain in to the pan. Tighten the drain plug when the oil is through draining.
   
3. 3 Unscrew the oil filter with an oil filter wrench. Place the oil filter with the waste oil.
   
4. 4 Rub new motor oil around the gasket of the new oil filter. Pour 1 qt. of oil in to the filter.
   
5. 5 Screw the filter to the filter housing with your hands. Do not wrench-tighten as this will strip the threads and make removal of the filter difficult.
   
Replacing the Oil Pan
6. 1 Locate all the bolts holding the oil pan in place. There will be 16 to 18 bolts.
   
7. 2 Unscrew all the bolts with a socket wrench. Lower the pan to the ground. If the pan is stubborn, tap it with a rubber mallet to loosen the seal from the gasket.
   
8. 3 Scrape clean all the gasket material around the bottom surface of the motor. This will ensure a tight seal with the new oil pan.
   
9. 4 Place the new gasket around the new oil pan. Raise the oil pan to the motor and screw in all the bolts. Do not tighten the bolts until all are threaded to the bottom of the motor.
   
10. 5 Tighten the bolts with a socket wrench. Ensure that all the bolts are tight.
    
Adding the New Motor Oil
11. 1 Open the hood to access the engine compartment. Unscrew the oil filler cap on top of the crankcase. Pull the engine oil dipstick from the tube. Wipe the dipstick clean with a fresh towel.
    
12. 2 Pour in 5 qt. of oil in to the engine crank case. Insert the dipstick back in to the tube and pull it back out. Check the oil level against the markings on the dipstick. Fill at 1/2 qt. intervals until the dipstick indicates "Full."
    
13. 3 Start the truck and allow it to run for five minutes. Allow the truck to sit for an additional five minutes to allow the oil to drain back to the oil pan.
    
14. 4 Check the oil level again. Fill if necessary, but do not overfill.
    

i would say that replacing oilpan was the cause of this problem and if the machanics shop was to instal a oil pan from an aftermarket company not the oem origional equipment there might be an issue with this dipstick tube on this paticular aftermarket part that was installed suggest to remove oil pan and inspect for inperfections near or around filler tube acess hole maybe gasket or silicone builup an that area
good luck