There is oil in the water, do you think its my oil cooler? And if it is, is the oil cooler attached to the radiator or is it seperate?

Yes, the oil cooler is water cooled.

https://www.google.com/search?q=2004+Chrysler+Pacifica+oil+cooler

..

RADIATOR
Removal
1. Disconnect battery ground cable.
2. Drain engine cooling system as described.
3. Remove engine air cleaner.
4. Remove upper radiator hose from water bypass tube.
5. Remove radiator overflow hose from radiator and fan shroud.
6. Remove transmission oil cooler line from oil cooler inlet fitting.
7. Remove nuts retaining A/C condenser core to the radiator.
8. Disconnect engine control sensor wiring from the auxiliary electric cooling fan motors and the CCRM.
9. Raise vehicle on hoist.
10. Remove splash shield from lower radiator support and front sub-frame.
11. Remove lower radiator hose from radiator.
12. Remove oil transmission cooler line from oil cooler outlet fitting on radiator.
13. Remove retaining screws for power steering/transaxle oil cooler and position cooler aside.
14. Support fan shroud, radiator and A/C condenser core with a suitable jackstand. Remove lower radiator
support.
15. Position jackstand aside and carefully remove radiator and fan shroud.
16. Remove two retaining bolts for fan shroud at top of radiator and remove fan shroud from radiator.
17. Remove upper radiator hose from radiator.
NOTE: Loosen transmission oil cooler lines while securely holding radiator
connector with a back-up wrench.
NOTE: Loosen transmission oil cooler lines while securely holding radiator
connector with a back-up wrench.
18. Remove the radiator.

RADIATOR
Removal
1. Disconnect battery ground cable.
2. Drain engine cooling system as described.
3. Remove engine air cleaner.
4. Remove upper radiator hose from water bypass tube.
5. Remove radiator overflow hose from radiator and fan shroud.
6. Remove transmission oil cooler line from oil cooler inlet fitting.
7. Remove nuts retaining A/C condenser core to the radiator.
8. Disconnect engine control sensor wiring from the auxiliary electric cooling fan motors and the CCRM.
9. Raise vehicle on hoist.
10. Remove splash shield from lower radiator support and front sub-frame.
11. Remove lower radiator hose from radiator.
12. Remove oil transmission cooler line from oil cooler outlet fitting on radiator.
13. Remove retaining screws for power steering/transaxle oil cooler and position cooler aside.
14. Support fan shroud, radiator and A/C condenser core with a suitable jackstand. Remove lower radiator
support.
15. Position jackstand aside and carefully remove radiator and fan shroud.
16. Remove two retaining bolts for fan shroud at top of radiator and remove fan shroud from radiator.
17. Remove upper radiator hose from radiator.
NOTE: Loosen transmission oil cooler lines while securely holding radiator
connector with a back-up wrench.
NOTE: Loosen transmission oil cooler lines while securely holding radiator
connector with a back-up wrench.
18. Remove Radiator

if it is an automatic ( make and model omitted in question) there is every chance that it is transmission oil from a burst cooler in the radiator tank. The fix is a new radiator or and air to air cooler core fitted in front of the radiator. If the engine is a diesel or an engine that has a sump oil cooler then the oil core has burst allowing engine oil into the radiator vial the coolant system. It may be from a failing head gasket where the oil hole to the rocker gear is leaking across to a water jacket

water in the oil ,can be from head gasket failure ,cracked head but most probably from corrosion behind the water pump impellor. If the engine has an engine oil cooler then the cooler unit is suspect. Check any unit attached to the engine that uses coolant for cooling

If the water is in the transmission oil then it will be the heat exchanger in the radiator tank and will require a new radiator

Hello Todd, sitting here thinking about it only 2 things comes to mind. First question is it is an automatic. If so then your transmission oil cooler inside the radiator has a leak which in turn it leaking transmission fluid into the radiator. So if it is the transmission do you see any red gunk in the radiator or the water. Now same process if it is motor oil if it is a manual transmission. These new vehicle have motor oil flowing through the radiator to cool off the motor oil also known as the oil cooler. 9 times out of ten all you have to do is buy a new radiator or remove the metal or rubber lines running to the radiator and splice them together with high pressure hose. Which I recommend power steering return 3/8 hose, tough stuff. Just slide the rubber hose over the tube and clamp it down tight with a hose clamp and give it a whirl. But first I recommend you flushing the radiator. Good luck.

If no external leak and the transmission fluid colour looks white, the problem belongs to the automatic gearbox oil cooler. The oil cooler has broke mixing the gearbox oil and coolant causing this milkshake. It's a small radiator core type oil / water heat exchanger. It is cracked inside and transmission oil is mixed with engine coolant. Because the transmission oil pressure is greater than engine coolant pressure, the transmission fluid level drops. See also the coolant colour inside recovery coolant reservoir inder bonnet! It could be like this:


The automatic gearbox oil cooler type oil / water heat exchanger (oil cooler):


In the picture above the transmission oil pan was removed for oil filter replacement.

Hello: The oil cooler is not in the radiator. The oil cooler is under the intake manifold which has to be removed to replace the oil cooler.

drain the radiator refill with water & use some radiator cleaner, you may need to repeat this several times to get all the oil out......hope this helps.....cheers

it should be ok . make shur you drain the water out . it happen to us at the shop befor made shore they were drained and had no problms