Oil leak Oil is leaking ( when motor running ) from one of the hoses going to the oilcooler. It started after a oil change, could there be to much oil in the engine ?

check the point where the fuel hose goes to the fuel tank
there is very fine filter in the hose that could be blocked preventing full fuel flow
only running on choke indicates insufficient fuel flow

check where the oil is coming from first. check around the oil filter for leaks. if from the front of the motor check power steering and hoses for leaks . Around the radiator check for hoses to the transmission cooler . Check for leaks around loose sump plug. check for oil leaks from rocker cover gaskets running down the block at the back

If the hose comes out the top of the transmission, this is the transmission vent line.

Make sure the line doesn't "dip" anywhere alone it's run, causing a low area where residual oil would "pool", then blow out under pressure.

Also, make sure transmission fluid isn't over-filled.

Michael
its a oil cooler it sounds like the gasket is blown just replace it no need to drain engine but u will get oil rfunning out put some thing under to catch oil

AC and motor oil leak are two separate issues unless your hoses have been wrongly connected (remote). So first attend to the oil leak. check if there is sufficient clean oil. If not get oil change. Once this problem solved, get AC checked out for freeon and fan connections.

you need to take the oil dipstick and see what color the oil is if it is milky color your piston rings are leaking or maybe main seal look on back side of motor side if real dirty oily wet also check your thermostat maybe leaking slowly on motor burning it off hope this helps where i would start

its more than likely either your head gasket or intake gasket. You either have the 3.4 or 3.8 engine and they are well known for these to leak.

First, plastic tube may be the overflow vent from the coolant bottle.Check to see where the attached end goes. You are going to have to check engine for coolant leaks (carefully refill system without spilling anything, then look for dripping anywhere. Look for leaks from all hoses, fittings radiator, water pump etc) After checking for leaks, start it up and check again (watch where you put your hands though) While running, check that the fan comes on when the vehicle reaches operating temp.(no fan, check fan motor, sensor & relay) Turn the heat on (does it have heat?) Check temp of lower hose and upper hose. If overheat happens, is lower hose still cold? (likely bad thermostat). If you found a leak, replace whatever is leaking...best insurance is to change thermostat after any overheat. Last, is there any white smoke from tailpipe, does engine run rough? If so, could be a failed head gasket or crack in cylinder head. (at this point last thing to worry about unless there is excessive smoke or rough run or oil in radiator or coolant in oil).

should be located on one of the valve covers with a hose going to it. any oil leaks... look on the ground if you can't see any obvious leaks

Robert

Get a can of Gunk and clean the engine according to the directions there (please do read them), with attention to the area around where the oil leak is.  Once you get the motor squeaky clean, you will be able to trace back to where the oil is coming from.  It may be running down the underside of a hose so you will need to look carefully.  You can do all this in the driveway.  You will probably have to let the engine get to operating temp before it will start leaking.