The cadillac leaks anifreeze but not from radiator or upper or lower hose what could it be

3.0L Engine

VIN S Engine

1. Before servicing the vehicle, refer to the precautions section.
2. Drain the cooling system.
3. Remove or disconnect the following:

• Splash shield
• Lower heater hose
• Radiator lower tube bolt
• Radiator upper front tube bolt
• Air cleaner assembly
• Battery and tray
• Water pump belt
• Upper radiator hose
• Engine vent hose
• Transaxle 10 pin connector
• Radiator bypass hose assembly
• Thermostat housing
• A/C compressor brace, if equipped
• Water pump mounting nuts
• Connector hose
• Water pump

To install:

1. Install or connect the following:

• Water pump
• Connector hose
• Water pump mounting nuts and tighten them to 15-22 ft. lbs. (20-30 Nm)
• A/C compressor brace, if equipped, and tighten the nuts to 15-22 ft. lbs. (20-30 Nm)
• Thermostat housing
• Radiator bypass hose assembly
• Transaxle 10 pin connector
• Engine vent hose
• Upper radiator hose
• Water pump belt
• Battery and tray
• Air cleaner assembly
• Radiator upper front tube bolt
• Radiator lower tube bolt
• Lower heater hose
• Splash shield

2. Fill the cooling system.
3. Start the engine and check for leaks.

Re: Where is the lower radiator hose?(99)

Stand in front of the car, open the hood, and face the engine.

On the left hand side of the radiator, at the top, is the upper radiator hose; which goes to the upper water pump connection.

On the right hand side of the radiator, from the bottom, is the lower radiator hose; which goes to the lower water pump connection.

Where is the lower radiator hose 99
It is a forum and goes on about draining the radiator.

Two big hoses attach to your radiator. Look for the one that goes back to the TOP of the engine. There is a housing with two bolts in it that the hose connects to. Drain radiator, remove hose. Remove the two bolts. Remove the housing. Thermostat is inside housing or still on engine. It just pulls out. Remove any remaining thermostat housing gasket material from the housing and the engine. Install new thermostat. Should only fit in one way. Install new thermostat housing gasket and the housing. Reattach hose and fill radiator, leaving the cap off. Turn on the car and wait until car gets to warm condition. You will see the water start to move from the radiator to the engine when the new thermostat releases at the proper temperature. Replace the radiator cap and clean up, you are finished.

1988–91 Models

1. Disconnect the negative battery cable.
2. Properly drain the cooling system into a suitable container.
3. Disconnect the fan motor and motor connector.
4. Disconnect the upper and lower radiator hoses.
5. Disconnect and plug the automatic transaxle cooling lines at the radiator, if equipped.
6. Disconnect the coolant reservoir overflow hose.
7. Remove the radiator attaching bolts and brackets.
8. Remove the radiator with the cooling fan attached.
9. Remove the cooling fan and shroud from the radiator. NOTE: Check all cooling system hoses for any signs of damage, leaks or deterioration and replace if necessary. To install:
   
10. Attach the cooling fan and shroud to the radiator and install the assembly.
11. Attach the radiator bolts and brackets. Tighten the radiator bracket bolts to 7 ft. lbs. (10 Nm).
12. Connect the coolant reservoir overflow hose.
13. Connect the automatic transaxle cooling lines to the radiator, if equipped.
14. Connect the upper and lower radiator hoses.
15. Connect the fan motor and thermo-switch wire connector.
16. Refill the system with the proper type and quantity of coolant, check for leaks and bleed the cooling system.
17. Reconnect the negative battery cable. Fig. 7: Cooling system components — 1988–91 engines
    

1992–95 Models

1. Disconnect the negative battery cable.
2. Properly drain the cooling system into a suitable container.
3. Disconnect the fan motor and motor connector.
4. Disconnect the upper and lower radiator hoses.
5. Disconnect and plug the automatic transaxle cooling lines at the radiator, if equipped.
6. Disconnect the coolant reservoir overflow hose.
7. Remove the radiator attaching bolts and brackets.
8. Remove the radiator with the cooling fan attached.
9. Remove the cooling fan and shroud from the radiator. NOTE: Check all cooling system hoses for any signs of damage, leaks or deterioration and replace if necessary. To install:
   
10. Attach the cooling fan and shroud to the radiator and install the assembly.
11. Attach the radiator bolts and brackets. Tighten the radiator bracket bolts to 7 ft. lbs. (10 Nm).
12. Connect the coolant reservoir overflow hose.
13. Connect the automatic transaxle cooling lines to the radiator, if equipped.
14. Connect the upper and lower radiator hoses.
15. Connect the fan motor and thermo-switch wire connector.
16. Refill the system with the proper type and quantity of coolant, check for leaks and bleed the cooling system.
17. Reconnect the negative battery cable. Fig. 8: Cooling system components — 1992–95 engines
    

Nissan Car 350Z & Maxima 1999-06 Radiator - Removal & Installation

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Drain the cooling system.
3. Remove or disconnect the following:
   Negative battery cable Coolant reservoir tank and bracket Upper mounting bracket Upper radiator hose Oil cooler lines, if equipped Lower radiator hose Cooling fan and condenser fan Fan motors and shields Radiator

To install:

1. Install or connect the following:
   Radiator Fan motors and shields Cooling and condenser fans and torque the bolts to 44 inch lbs. (5 Nm) Lower radiator hose Oil cooler lines, if equipped Upper radiator hose Upper mounting bracket Coolant reservoir tank and bracket and torque the bolt to 44 inch lbs. (5 Nm) Negative battery cable
2. Fill the cooling system to the proper level.
3. Start the vehicle, check for leaks and repair if necessary.

WARNING Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.

1. Before servicing the vehicle, refer to the Precautions section.
2. Drain the cooling system.
3. Remove or disconnect the following:
   Negative battery cable Coolant reservoir tank and bracket Upper mounting bracket Upper radiator hose Oil cooler lines, if equipped Lower radiator hose Cooling fan and condenser fan Fan motors and shields Radiator
   

To install:

1. Install or connect the following:
   Radiator Fan motors and shields Cooling and condenser fans and torque the bolts to 44 inch lbs. (5 Nm) Lower radiator hose Oil cooler lines, if equipped Upper radiator hose Upper mounting bracket Coolant reservoir tank and bracket and torque the bolt to 44 inch lbs. (5 Nm) Negative battery cable


2. Fill the cooling system to the proper level.
3. Start the vehicle, check for leaks and repair if necessary.

WARNING Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.


Fig. Exploded view of radiator and components

1. Before servicing the vehicle, refer to the Precautions section.
2. Drain the cooling system.
3. Remove or disconnect the following:
   CAUTION Do not damage or scratch the A/C condenser and radiator core while removing.
   CAUTION Because A/C condenser is onto the front-lower portion of radiator, moving to rear direction should be at minimum.
   Negative battery cable Engine cover Air duct and air cleaner case assembly Bracket mounting bolt for anchoring A/C piping Reservoir tank and bracket Upper and lower radiator hoses Radiator cooling fan assembly On A/T models, A/T fluid cooler hoses. Plug hoses to avoid leakage Cover, then two A/C condensing mounting bolts located in the upper part of the radiator Rotate two radiator upper mount brackets 90 degrees in the direction shown in the illustration and remove
   
   Fig. Removing A/C condensing mounting bolts
   
   
   
   Fig. Rotating radiator upper mount brackets 90 degrees
   
   
   
   Fig. Removing radiator
   
4. Remove the radiator by performing the following:
   CAUTION Lifting A/C condenser should be minimum to prevent a load to A/C piping.
   With lifting and pulling radiator in a rear direction, disassemble lower mount from radiator core support center. Lift A/C condenser up and remove radiator after disengaging the fitting as front-bottom surface After removing radiator, put A/C condenser on radiator core support center to prevent a load to A/C piping, and temporarily fix it with rope or similar means

To install:

1. To install, reverse removal procedure.
2. Check radiator cap for any leaks.
3. Start and warm up engine. Check for engine coolant leaks and A/T fluid leaks.

Hope this help (remember comment and rated this).

First you have to figure out where it is leaking from.
The usual suspects would be the upper or lower radiator hoses, and after that, the radiator itself.
Hopefully it's a hose, they're usually relatively simple to get at and relatively inexpensive.
However, in order to replace them you will have to at least partially or fully drain the radiator, depending on whether the upper or lower hose is the culprit.
My last leak was from the hose running from the engine block to the heater core.
Let me know what you find, and where.

Hi:

If you have a leak near the lower radiator connection that just started, it is either a failed hose, or possibly a radiator core leak that is dripping down to that area.
If you havent changed your radiator hoses for awhile, and they feel soft, it isn't a bad idea to change them both. If you drain your radiator to change the hoses, this would be a good time to inspect the radiator, and perhaps you will find the source of the leak.

Disconnect battery ground cable. Remove battery. Remove battery tray. Remove clip retaining contant control relay module and position module aside. Remove radiator cap. Raise vehicle front end as high as possible. Remove radiator splash shield. Drain radiator. Remove the radiator mounting bracket assembly. Remove lower radiator hose. Partially lower vehicle. Remove upper radiator hose. Remove radiator overflow hose. Remove upper A/C condenser core retaining bolts. Remove upper transmission oil cooler tube clips. Remove lower transmission oil cooler tube. Raise vehicle. Remove lower transmission oil cooler tube clips. Remove lower transmission oil cooler tube. Remove transmission oil cooler bracket and position transmission oil cooler aside. Remove lower A/C condenser core bolts and position A/C condenser core aside(be careful not to loosen the AC condenser lines. Remove radiator support bracket. Remove radiator out through the bottom of the vehicle.
Installation
Position radiator. Position radiator support bracket and tighten nuts. Position A/C condenser core and tighten lower A/C condenser core bolts. Position transmission oil cooler tube and install transmission oil cooler tube bracket. Install lower transmission oil cooler tube. Install lower transmission oil cooler tube clips. Install lower radiator hose. Install radiator mounting bracket assembly. Tighten bolts. Install radiator splash shield. Lower vehicle. Install upper tranmission oil cooler tube. Install upper transmission oil cooler tube clips. Install upper A/C condenser core retaining bolts. Tighten bolts. Install radiator overflow hose and tighten clamps securely. Install upper radiator hose. Position constant control relay module and clip securely. Install battery tray. Install battery. Connect battery ground cable. Fill and bleed cooling system. Start engine and inspect for leaks.

depending on how many miles you have on the car i would look at the lower hose first; the other common problem on a 93 cav would be the lower radiator neck or radiator leak; the lower hose has less pressure on it than the upper so sometimes finding the leak can be tricky. with the engine off and cold squeeze the lower hose by the radiator to see if any fluid comes out. otherwise you would have to pressurize the system to find the leak

I’m happy to help further over the phone at https://www.6ya.com/expert/gregory_8e6ba270263743ac

Under the housing at the LOWER END of the UPPER RADIATOR HOSE