1999 Yukon Denali

[Oh Bob Saget]

Hello, I have a 1999 Yukon Denali. It looks to me to basicly be the escalade from that time period as its not the 1999 tahoe and its not the 2000 tahoe. It has the squared grille and the 5.7. I need a manual and step by step info on how to replace some things that are failing. I was wondering if any of you could point me in the right direction to a manual that would help me with this?

Seems i have an oil leak on my intake manifold and it needs to be resealed.
I also have a coolent leak and the coolent lines? need to be replaced?

Any help would be great. Also if any of you have suggestions on what else i should be replacing while im fixing this stuff that would be great too. Im no mechanic , i just cant afford to have the dealership fix this right now.

Again thanks!

 

[SunlitComet]

Technically no oil runs thru the intake manifold but there is a oil pressure switch in the back of block near it. Is that where you see the leak?

For the coolant leak where exactly is it coming from? your question is unclear.

 

[Oh Bob Saget]

I had some work done at the dealership. They said i has an oil leak at the intake minfold. And said my coolent lines needed to be replaced. Other then that im not sure.

---------- Post added at 10:16 AM ---------- Previous post was at 10:11 AM ----------

So i called the dealership again. They said.

I have a right front corner oil leak on my intake manifold & my engine oil cooler lines need to be replaced.

 

[SunlitComet]

Yeah, they are probably talking about the rtv sealant in that are giving out.Print out these instructions below for each job:



Intake Manifold Replacement - Lower

---------- Post added at 11:37 AM ---------- Previous post was at 11:36 AM ----------

Intake Manifold Replacement - Lower REMOVAL PROCEDURE

1. Disconnect the battery negative cable. Refer to Battery Cable in Powertrain Management.
2. Drain the engine coolant. Refer to Draining and Filling Cooling System.
3. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Powertrain Managements.
4. Remove the following coolant hoses:
5. Upper radiator hose. Refer to Radiator Hose Replacement.
6. Both heater hoses. Refer to Heater Hoses Replacement (Inlet Hose) or Heater Hoses Replacement (Outlet Hose) in Cooling System.
7. Water pump inlet hose. Refer to Hot Water Bypass Valve Replacement in Cooling System.
8. Disconnect all electrical connectors and secure out of the way.
9. Remove the distributor. Refer to Distributor Replacement in Powertrain Management.
10. Use a twisting motion to remove the vacuum brake booster hose, if equipped.
11. Disconnect the accelerator control cable and the cruise control cable, if equipped. Refer to Accelerator Controls Cable Replacement in Powertrain Managements.
12. Remove the drive belt. Refer to Drive Belt Replacement. IMPORTANT: It is not necessary to discharge the A/C refrigerant.
13. Remove the Air Conditioning (A/C) compressor, if equipped, and set the A/C compressor aside. Refer to Compressor Replacement.

1. Remove the PCV valve.
2. Disconnect the Exhaust Gas Recirculation (EGR) pipe from the bracket and the front of the intake manifold. Refer to Sec Air Injection Check Valve/Pipe Replacement in Powertrain Managements.
3. Disconnect the fuel pipes from the rear of the intake manifold. Refer to Fuel Hose/Pipes Assembly Replacement (Fuel Pipes Side Tank) in Powertrain Managements.
4. Disconnect the electrical connector from the power steering pump.

1. Remove the power steering bracket using the following procedure:

• • Remove the power steering pump. Refer to Power Steering Pump Replacement (5.0L, 5.7L) in Steering and Suspension.
  • Remove the nut, then the bolts.
  • Remove two nuts from the back of the power steering pump.
  • Slide the power steering bracket forward, with the power steering pump still attached.

1. Disconnect the wiring bracket from the rear of the right cylinder head.
2. Remove the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement.
3. Remove the intake manifold.
4. Clean all surfaces.

 

[SunlitComet]

INSTALLATION PROCEDURE

Notice: Applying excessive amounts of sealant may prohibit the intake gasket from sealing properly.

Important: The lower intake manifold must be installed and the fasteners tightened while the adhesive is still wet to the touch.

1. Apply a 4.0 mm (0.157 inch) patch of adhesive GM P/N 12346141 or equivalent to the cylinder head side of the lower intake manifold gasket at each end.
2. Install the lower intake manifold gasket onto the cylinder head. Use the gasket locator pins in order to properly seat the lower intake manifold gasket onto the cylinder head.

NOTICE: Care must be used to apply the correct amount of sealant onto the gaskets. Applying excessive amounts of sealant may prohibit the intake gaskets from sealing properly.

IMPORTANT: All sealing surfaces must be clean, free of oil, dirt, or any other foreign material.

1. Apply a 5 mm (0.197 inch) bead of adhesive GM P/N 12346141 or equivalent to the front top of the engine block.
2. Extend the adhesive bead 13 mm (0.50 inch) onto the each lower intake manifold gasket.

1. Apply a 5 mm (0.197 inch) bead of adhesive GM P/N 12346141 or equivalent to the rear top of the engine block.
2. Extend the adhesive bead 13 mm (0.50 inch) onto each lower intake manifold gasket.

1. Install the lower intake manifold onto the engine block and the cylinder heads. NOTICE: Refer to Fastener Notice in Service Precautions.
2. Apply threadlock GM P/N 12345382 or equivalent to the threads of the lower intake manifold bolts.

NOTICE: Proper lower intake manifold fastener tightening sequence and torque is critical. Always follow the tightening sequence, and torque the intake manifold bolts using the 3 step method. Failing to do so may distort the crankshaft bearing bore alignment and cause damage to the crankshaft bearings.

1. Install the lower intake manifold bolts.

9.1. Tighten the bolts on the first pass in sequence (1-8) to 3 Nm (27 inch lbs.) . 9.2. Tighten the bolts on the second pass in sequence (1-8) to 12 Nm (106 inch lbs.) . 9.3. Tighten the bolts on the final pass in sequence (1-8) to 15 Nm (11 ft. lbs.) .

1. Connect the Evaporative Emission (EVAP) canister purge solenoid valve harness.

10.1. Push the elbow inward until the quick connect snaps into place. 10.2. Pull the elbow outward in order to ensure proper connection.

1. Install the valve rocker arm covers Refer to Valve Rocker Arm Cover Installation (Right) and Valve Rocker Arm Cover Installation (Left). NOTICE: Refer to Fastener Notice in Service Precautions.
2. Install the power steering bracket using the following procedure:

• • Install the power steering bracket onto the stud.
  • Install the nut onto the stud finger tight.
  • Install the three bolts finger tight.
  • Install the two nuts to the back of the power steering pump.
  • Tighten the nuts and the bolts to 41 Nm (30 ft. lbs.) .
  • Install the power steering pump. Refer to Power Steering Pump Replacement in Steering and Suspension.
  • Connect the electrical connector to the power steering pump.
  • Connect the fuel pipes to the rear of the intake manifold. Refer to Fuel Hose/Pipes Assembly Replacement (Fuel Pipes Side Tank) in Powertrain Managements.
  • Connect the wiring bracket to the rear of the right cylinder head.

1. Install the PCV valve.
2. Connect the Exhaust Gas Recirculation (EGR) pipe to the bracket and the front of the intake manifold. Refer to Sec Air Injection Check Valve/Pipes Replacement in Powertrain Managements.
3. Use a twisting motion to install the vacuum brake booster hose, if equipped.
4. Install AIR check valve (crossover) pipe, if equipped. Refer to Sec Air Injection Check Valve/Pipe Replacement in Powertrain Managements.

1. Install the Air Conditioning (A/C) compressor onto the power steering bracket.
2. Install the A/C compressor bolts.

• • Tighten the bolts to 50 Nm (37 ft. lbs.) .

1. Install the drive belt. Refer to Drive Belt Replacement.
2. Connect the accelerator control cable and the cruise control cable, if equipped. Refer to Accelerator Controls Cable Replacement in Powertrain Managements.
3. Install the distributor. Refer to Distributor Replacement.
4. Connect all electrical connectors.

1. Install the following coolant hoses.

• • Upper radiator hose. Refer to Radiator Hose Replacement in Cooling System.
  • Both heater hoses. Refer to Heater Hoses Replacement (Inlet Hose) or Heater Hoses Replacement (Outlet Hose) in Cooling System.
  • Water pump inlet. Refer to Hot Water Bypass Valve Replacement in Cooling System.
  • Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Powertrain Managements.
  • Fill the cooling system with coolant. Refer to Draining and Filling Cooling System.
  • Connect the battery negative cable. Refer to Battery Cable in Powertrain Management.

 

[SunlitComet]

Service and Repair REMOVAL PROCEDURE

The optional oil cooler is either an integral part of the radiator or this is a separate unit placed in front of the radiator. The cooler lines and hoses are serviceable.

1. Set the parking brake.
2. Pull back along the pipe in order to remove the plastic cap from the connector.
3. Use a small, pick-type tool or screwdriver in order to release one of the open ends of the retaining ring from the connector fitting.

1. Rotate the retaining ring out of position on the connector fitting and remove the ring completely.
2. Discard the retaining ring clip.

1. Pull outward on the pipe in order to remove the pipe from the connector fitting.

1. Remove the oil cooler lines from the oil cooler fittings.

1. For the 5.0L and the 5.7L only, remove the bolt and the clamp from the bracket.
2. Remove the oil cooler lines from the oil cooler fittings.

1. For the 7.4L only, remove the bolt and the clamp from the bracket.
2. Remove the oil cooler lines from the oil cooler fittings.

1. For 6.5L only, remove the bolt and the clamp from the bracket.
2. Remove the oil cooler lines from the oil cooler fittings.
3. Remove and discard the oil filter.
4. Clean all of the components in a suitable solvent, and dry them with compressed air.

• • Use a clean solvent and compressed air in order to backflush the oil the oil cooler and lines.
  • Use compressed air in order to remove the cleaning solvent.
  • Use the same type of oil normally circulated through the cooler in order to flush the system.

1. Inspect all of the fittings, connectors and cooler lines for damage or distortion.

 

[SunlitComet]

INSTALLATION PROCEDURE

1. Install the oil filter.
2. Install the retaining clip into the connector fittings. Do not reuse the existing retaining clips removed from the cooler line connector fittings. The retaining clips being put into the cooler line connector fittings must be new.
3. Using your thumb and forefinger, insert a new retaining clip into one of the three connector fitting recesses. Ensure that the retaining clip engages all three slots in the connector fittings. Failure to properly install the connector clips could cause the cooler lines to come loose and cause damage to the engine.

1. With one end of the retaining clip engaged in the connector fitting slot, use your thumb to rotate the retaining clip around the connector fittings, until the clip snaps into place.

1. Do not install the new retaining ring onto the fitting by pushing the retaining ring.

1. Ensure that the three retaining ring ears are seen from inside the fitting and that the retaining ring moves freely in the fitting slots.
2. Install the new retaining ring into the remaining quick connect fittings.

1. Install the cooler lines to the vehicle. Ensure the cooler line being installed has a plastic cap on each end that connects to the quick connect fitting. If no plastic cap exists, or the plastic cap is damaged, obtain a new cap and position on to the cooler line prior to the cooler line installation.

• • Before connecting the lines, test the oil flow through the cooler.
  • If oil flow restriction is not present, connect the oil lines to the connector fitting.
  • If oil flow restriction is present, replace the radiator. Refer to Radiator Replacement.

1. Install the cooler line into the quick connect fitting.
2. Insert the cooler line end into the quick connect fitting until a click is either heard or felt.

1. Do not use the plastic cap on the cooler line in order to install the cooler line into the fitting.
2. Pull back sharply on the cooler line in order to ensure that the cooler line is fastened into the quick connect fitting.

1. Position and snap the plastic cap onto the fitting. Do not manually depress the retaining ring when installing the plastic cap onto the quick connect fitting.
2. Ensure that the plastic cap is fully seated against the fitting.

1. Ensure that no gap is present between the cap and the fitting.

1. Ensure that the yellow identification band on the tube is hidden within the quick connect fitting. A hidden yellow identification band indicates proper joint seating.

1. Do not install the cooler line end into the fitting incorrectly.
2. If you cannot position the plastic cap against the fitting, remove the retaining ring from the quick connect fitting per Step 3 of the cooler line removal procedure. Inspect the retaining ring and the tube end in order to ensure neither is bent. Replace the cooler line or the retaining ring if necessary, and reinstall per Step 2 of the cooler line installation procedure.
3. Install the cooler line into the quick connect fitting again in order to install the remaining cooler lines into the remaining quick connect fittings.

NOTICE: Refer to Fastener Notice in Service Precautions.

1. Tighten the oil cooler fittings.

• • Tighten the oil cooler fittings to 24 Nm (18 ft. lbs.) . For the 5.0L and the 5.7L, install the oil cooler lines to the oil cooler fittings.

1. For the 7.4L, install the oil cooler lines to the oil cooler fittings.

• • Tighten the oil cooler fittings to 24 Nm (18 ft. lbs.) .

1. Install the oil cooler lines to the clip.
2. Install the bolt to the clip.

• • Tighten the bolt to 6 Nm (53 inch lbs.) .

1. For diesel engines, install the oil cooler lines to the oil cooler fittings.

• • Tighten the oil cooler fittings to 24 Nm (118 ft. lbs.) .

1. Install the oil cooler lines to the clip.
2. Install the bolt to the clip.

• • Tighten the bolt to 6 Nm (53 inch lbs.) .

1. Tighten the bolt and the clamp to the bracket.

• • Tighten the bolt to 9 Nm (80 inch lbs.) .

1. Run the engine. Inspect the cooling system for leaks.

 

[SunlitComet]

You will need a scanner that can read CAM_RETARD to fine tune the distributor install:


Service and Repair DISTRIBUTOR REPLACEMENT

REMOVAL PROCEDURE

NOTE: There are two procedures available to install the distributor.

Use Installation Procedure 1 when the crankshaft has NOT been rotated from the original position.

Use Installation Procedure 2 when any of the following components are removed:

• The intake manifold.
• The cylinder head.
• The camshaft.
• The timing chain or sprockets.
• The complete engine.

If the Malfunction Indicator Lamp turns on, and a DTC code P1345 sets after installing the distributor, this indicates an incorrectly installed distributor.

Engine damage or distributor damage may occur. Use Procedure 2 in order to install the distributor.

1. Turn OFF the ignition switch. Remove the spark plug wires from the distributor cap.

• • Twist each spark plug 1/2 turn.
  • Pull only on the boot in order to remove the wire from the distributor cap.

1. Remove the electrical connector from the base of the distributor.

1. Remove the two screws that hold the distributor cap to the housing.
2. Discard the screws.
3. Remove the distributor cap from the housing.

1. Use a grease pencil in order to note the position of the rotor in relation to the distributor housing (1).
2. Mark the distributor housing and the intake manifold with a grease pencil.

1. Remove the mounting clamp hold down bolt.
2. Remove the distributor.

1. As the distributor is being removed from the engine watch the rotor move in a counter-clockwise direction about 42 degrees . This will appear as slightly more than one clock position.
2. Note the position of the rotor segment.

11.1. Place a second mark on the base of the distributor.
This will aid in achieving proper rotor alignment during the distributor installation. 11.2. The second mark on the distributor housing is identified in the graphic as number 2.

 

[SunlitComet]

INSTALLATION PROCEDURE 1

1. If installing a new distributor assembly, place two marks on the new distributor housing in the same location as the two marks on the original housing.
2. Remove the new distributor cap, if necessary.
3. Align the rotor with mark made at location 2.

1. Guide the distributor into the engine.
2. Align the hole in the distributor hold-down base over the mounting hole in the intake manifold.

1. As the distributor is being installed, observe the rotor moving in a clockwise direction about 42 degrees .
2. Once the distributor is completely seated, the rotor segment should be aligned with the mark on the distributor base in location number 1.

• • If the rotor segment is not aligned with the number 1 mark, the driven gear teeth and the camshaft have meshed one or more teeth out of alignment.
  • In order to correct this condition, remove the distributor and reinstall it.

NOTE: Refer to Fastener Notice in Service Precautions.

1. Install the distributor mounting clamp bolt. Tighten Tighten the distributor clamp bolt to 25 N.m (18 lb ft) .

1. Install the distributor cap.
2. Install two NEW distributor cap screws. Tighten Tighten the screws to 2.4 N.m (21 lb in) .
3. Install the electrical connector to the distributor.
4. Install the spark plug wires to the distributor cap.

1. Install the ignition coil wire. The wire must not touch anything like the dip slick. Rubbing will make a ground/short after time of use.
2. For V8 engines, connect a scan tool.

1. Monitor the Camshaft Retard Offset value. Refer to Computers and Control Systems Camshaft Retard Offset Adjustment. IMPORTANT: If the Malfunction Indicator lamp is turned on after installing the distributor, and a DTC P1345 is found, the distributor has been installed incorrectly.
2. Refer to Installation Procedure 2 for proper distributor installation.

INSTALLATION PROCEDURE 2

IMPORTANT: Rotate the number 1 cylinder to Top Dead Center (TDC) of the compression stroke. The engine front cover has 2 alignment tabs and the crankshaft balancer has 2 alignment marks (spaced 90 degrees apart) which are used for positioning number 1 piston at Top Dead Center (TDC) . With the piston on the compression stroke and at top dead center, the crankshaft balancer alignment mark (1) must align with the engine front cover tab (2) and the crankshaft balancer alignment mark (4) must align with the engine front cover tab (3).

1. Rotate the crankshaft balancer clockwise until the alignment marks on the crankshaft balancer are aligned with the tabs on the engine front cover and the number 1 piston is at top dead center of the compression stroke.

1. Align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear (3). NOTE: The OBD II ignition system distributor driven gear and rotor may be installed in multiple positions. In order to avoid mistakes, mark the distributor on the following components in order to ensure the same mounting position upon reassembly:

• • The distributor driven gear
  • The distributor shaft
  • The rotor holes

Installing the driven gear 180 degrees out of alignment, or locating the rotor in the wrong holes, will cause a no-start condition. Premature engine wear or damage may result.

1. With the gear in this position, the rotor segment should be positioned as shown for a V6 engine (1) or V8 engine (2).

• • The alignment will not be exact.
  • If the driven gear is installed incorrectly, the dimple will be approximately 180 degrees opposite of the rotor segment when the gear is installed in the distributor.

1. Using a long screw driver, align the oil pump drive shaft to the drive tab of the distributor.

1. Guide the distributor into the engine. Ensure that the spark plug towers are perpendicular to the centerline of the engine.

1. Once the distributor is fully seated, the rotor segment should be aligned with the pointer cast into the distributor base.

• • This pointer may have a 6 cast into it, indicating that the distributor is to be used on a 6 cylinder engine or a 8 cast into it, indicating that the distributor is to be used on a 8 cylinder engine.
  • If the rotor segment does not come within a few degrees of the pointer, the gear mesh between the distributor and the camshaft may be off a tooth or more.
  • If this is the case, repeat the procedure again in order to achieve proper alignment.

NOTE: Refer to Fastener Notice in Service Precautions.

1. Install the distributor mounting clamp bolt. Tighten Tighten the distributor clamp bolt to 25 N.m (18 lb ft) .

1. Install the distributor cap.
2. Install two NEW distributor cap screws. Tighten Tighten the screws to 2.4 N.m (21 lb in) .
3. Install the electrical connector to the distributor.
4. Install the spark plug wires to the distributor cap.

1. Install the ignition coil wire. The wire must not touch anything like the dip stick. Rubbing will make a ground/short after time of use.

 

[SunlitComet]

1. For V8 engines, connect a scan tool.

1. Monitor the Camshaft Retard Offset value. Refer to Computers and Control Systems Camshaft Retard Offset Adjustment. IMPORTANT: If the Malfunction Indicator lamp is turned on after installing the distributor, and a DTC P1345 is found, the distributor has been installed incorrectly.
2. Refer to Installation Procedure 2 for proper distributor installation.