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Acura MDX 2005

Tobe82

Experto
Trabajando en un Acura mdx 2005 3.5L V6 J35A5
CYLINDER HEAD, REPLACE
Refer to Fig. 1, when replacing cylinder heads.
1.Relieve fuel pressure as outlined under "Precautions."
2.Drain engine coolant into suitable container.
3.Remove mounting bolts, then intake manifold and ignition coil covers.
4.Relieve tensioner by moving auto-tensioner and remove drive belt.
5.Remove power steering pump and hose bracket mounting bolt.
6.Remove harness clamp and bracket, then disconnect alternator connector and wire from alternator.
7.Remove mounting bolt bracket mounting bolt and alternator.
8.Remove intake manifold as outlined under "Intake Manifold, Replace."
9.Disconnect connector, then remove mounting bolts and ignition coils.
10.Remove timing belt.
11.Remove six injector connectors and wire harness clamps from cylinder head.
12.Remove Engine Coolant Temperature (ECT), Camshaft Position (CMP) and Crankshaft Position (CKP) sensors' connectors.
13.Remove Exhaust Gas Recirculation (EGR) valve and VTEC solenoid valve connectors, then VTEC oil pressure switch and oil pressure switch connectors.
14.Remove two Air Fuel Ratio (A/F) sensor and two secondary Heated Oxygen Sensor (secondary HO2S) connectors.
15.Remove upper and lower radiator hoses.
16.Remove heater and water bypass hoses.
17.Remove harness bracket mounting bolts.
18.Remove fuel feed hose, mounting and fuel rails.
19.Remove air conditioning compressor clutch connector from fan shroud and disconnect it.
20.Disconnect air conditioner condenser fan connector and remove wire harness clips from shroud.
21.Loosen lower mounting bolts and remove upper mounting bolts, then condenser fan shroud.
22.Disconnect front Air Fuel Ratio (A/F) sensor connector (Bank 2, Sensor 1) and front secondary Heated Oxygen Sensor (secondary HO2S) connector (Bank 2, Sensor 2), Fig. 2.
23.Remove mounting nuts and front (Bank 2) three-way catalytic converter (WU-TWC).
24.Disconnect rear A/F) sensor connector (Bank 1, Sensor 1) and rear secondary HO2S connector (Bank 1, Sensor 2), Fig. 3.
25.Remove mounting nuts, bracket and rear (Bank 1) WU-TWC.
26.Remove mounting bolts, nuts and water passage.
27.Remove front and rear camshaft pulleys, then and front and rear back covers.
28.Remove dipstick, then two harness holder mounting bolts and Positive Crankcase Ventilation (PCV) hose.
29.Remove power steering hose bracket and harness holder mounting bolts.
30.Remove harness clamps and breather hose.
31.Remove mounting bolts and valve cover.
32.Remove cylinder head bolts 1/3 turn at a time in sequence.
33.Remove cylinder head, Fig. 4.
34.Reverse procedure to install, noting following:
a.Set timing belt drive pulley to Top Dead Center (TDC) by aligning timing belt drive pulley tooth TDC mark with oil pump pointer, Fig. 5.
b.Set camshaft pulleys to TDC by aligning camshaft pulleys' TDC marks with back covers' pointers, Figs. 6 and 7.
c.Torque cylinder head bolts to 19 ft. lbs., in sequence, Fig. 8.
d.Torque head bolts to 51 ft. lbs., in sequence.
e.Torque bolts to 72 ft. lbs., in sequence.
 

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Tobe82

Experto
INTAKE MANIFOLD, REPLACE
Acura mdx 2005 3.5L V6 J35A5
Refer to Fig. 1 when replacing intake manifold.
1.Remove mounting bolts and intake manifold cover.
2.Disconnect Intake Air Temperature (IAT) sensor 2 connector, then remove breather pipe and intake air duct.
3.Remove Positive Crankcase Ventilation (PCV), brake booster vacuum and vacuum hoses, then vacuum line mounting bolts.
4.Remove Evaporative Emission (EVAP) canister hose and transaxle breather hose clamp bracket.
5.Remove and plug water bypass hoses.
6.Remove Intake Air Temperature (IAT) sensor 1, throttle actuator and Manifold Absolute Pressure (MAP) sensor connectors.
7.Remove Evaporative Emission (EVAP) canister purge valve and Intake Manifold Runner Control (IMRC) actuator connectors.
8.Remove wire harness clamps from intake manifold.
9.Remove mounting bolts and nuts in 2-3 steps in sequentially and upper cover, Fig. 2.
10.Remove mounting bolts and nuts in 2-3 steps in sequentially, then intake manifold and spacer, Fig. 3.
11.Reverse procedure to install, noting following:
a.Torque intake manifold mounting bolts and nuts in 2-3 steps to 16 ft. lbs. in sequence, Fig. 4.
b.Torque upper cover mounting bolts in 2-3 steps to 106 inch lbs. in sequence, Fig. 5.
 

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Tobe82

Experto
Reemplazo de banda de tiempo
Acura mdx 2005 3.5L V6 J35A5
MDX
This engine is classified as an Interference engine. If the timing belt breaks or jumps timing, a piston may contact an open valve. Piston to valve contact may cause damage to the valve, piston and other engine components. In some cases valve to valve contact may be experienced when the timing belt breaks or jumps timing. To avoid belt breakage, replace the timing belt as recommended by the vehicle manufacturer timing belt replacement interval.
With the timing belt removed, avoid turning the camshaft or crankshaft. If movement is required, exercise extreme caution to avoid valve damage caused by piston contact.
1.Prior to disconnecting the battery, obtain the customer anti-theft radio code.
2.Disconnect and isolate the battery ground cable, then the positive cable.
3.Place the crankshaft pulley at the No. 1 cylinder TDC compression stroke position, Fig. 1.
4.Raise and support the front of the vehicle with jack stands.
5.Remove the splash shield attaching bolts, then the splash shield.
6.Release the auto-tensioner to remove tension from the alternator belt, then remove the alternator drive belt.
7.Remove the power steering pump belt.
8.Remove the engine oil dipstick and tube. Discard the O-ring.
9.Support engine with a suitable jack and wooden block placed under the oil pan, then remove the side engine mount.
10.Remove the crankshaft pulley using Acura holder handle tool No. 07JAB-001020A and holder attachment tool No. 07MAB-PY3010A, or equivalents and a 19 mm socket.
11.Remove the upper and lower timing belt covers, Fig. 2.
12.Remove one of the battery clamp bolts from the battery tray and grind the end of the bolt to a taper, Fig. 3.
13.To hold the timing belt adjuster in its current position, thread in the battery clamp bolt hand tight, Fig. 4.
14.Loosen the idler pulley bolt approximately five or six turns, then remove the timing belt.
15.Inspect all components for damage and wear and replace as required. Clean the upper and lower covers before installation.
16.Set the timing belt crankshaft sprocket so the No. 1 piston is at TDC. Align the crankshaft sprocket mark with the indicator on the oil pump, Fig. 5.
17.Set the camshaft sprockets so the No. 1 piston is at TDC. Align the TDC indicator marks on the camshaft pulleys with the indicators on the rear timing belt covers, Fig. 6.
18.Remove the battery clamp bolt from the back cover.
19.Remove the auto-tensioner.
20.Align the auto-tensioner housing and rod holes.
21Using a suitable hydraulic press, slowly compress the auto-tensioner and insert an 0.08 inch diameter pin through the housing into the rod, Fig. 7. Do not exceed 220 lbs., of pressure.
22.Install the auto-tensioner and torque the mounting bolts to 108 inch lbs. Ensure the stopper stays in place.
23.After the engine has cooled down, install the new timing belt by looping it under the crankshaft sprocket, then place the belt over the idler pulley, around the front camshaft sprocket, under the water pump sprocket, around the rear camshaft sprocket and over the inside of the adjuster pulley.
24.Torque the idler pulley bolt to 33 ft. lbs.
25.Remove the stopper from the auto-tensioner.
26.Install the engine mount bracket. Torque the horizontal bolts to 33 ft. lbs., and the vertical bolt to 108 inch lbs.
27.Install the lower timing belt cover, then the front and rear upper covers.
28.Clean the crankshaft pulley bolt and washer.
29.Clean all oil from the crankshaft pulley inside face.
30.Apply a suitable lubricant to the crankshaft pulley bolt and washer.
31.Install the crankshaft pulley, then torque the pulley bolt to 181 ft. lbs. Do not use an impact wrench.
32.Rotate the crankshaft pulley approximately five or six turns clockwise to position the timing belt on the sprockets.
33.Ensure the crankshaft pulley and camshaft sprocket timing marks are at TDC, Figs. 1 and 8.
34.If either camshaft sprocket is not at TDC, remove the timing belt and adjust the positioning, then re-install the belt.
35.Install the engine oil dipstick and tube with a new O-ring. Torque the retaining bolt to 108 inch lbs.
36.Install the power steering pump and alternator drive belts. Refer to "Accessory Drive Belt Tension" for proper belt tension.
37.Install the side engine mount. Torque the horizontal bolt to 40 ft. lbs., and the vertical bolts to 33 ft. lbs.
38.Connect the battery ground cable, then the positive cable.
39.Start the engine and ensure it operates properly.
40.Enter the radio anti-theft code.
 

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