How to change the timing belt

Hello â€

It looks like this guide has the instructions on how to change out the timing belt step by step

https://www.2carpros.com/diagrams/isuzu/rodeo/2004

Please run down these guides and report back.

Put the engine no.1 piston on its compression/TDC and then line up the cam and crank shafts markings

The camshaft would tend to run away so you need to hold them in position while installing the belt.

https://www.2carpros.com/questions/1999-isuzu-rodeo-need-step

Refer to the above link.

REMOVAL & INSTALLATION
CAUTION: This application may be an interference engine. DO NOT rotate camshaft or crankshaft when timing belt is removed, or engine damage may occur.

TIMING BELT

Removal

1. Disconnect negative battery cable. Remove air cleaner assembly. Remove upper fan shroud. Relieve tension on serpentine drive belt tensioner and remove serpentine drive belt.

2. Remove 4 cooling fan assembly mounting nuts and remove cooling fan assembly. Remove cooling fan drive pulley. Remove serpentine drive belt idler pulley assembly. Remove serpentine drive belt tensioner assembly.

3. Remove power steering pump with hoses attached, and set aside. Using Crankshaft Holder (J-8614-01) or equivalent, hold crankshaft from turning and remove crankshaft pulley bolt. Remove crankshaft pulley.

4. Disconnect harness connector from right side timing belt cover (if equipped). Remove timing belt covers in this order: right, left, then lower. Remove fan bracket (if equipped).

5. Rotate crankshaft to align timing marks. See Fig. 1 and Fig. 2. When timing marks are aligned, No. 2 piston will be at TDC.

6. If reusing timing belt, mark belt with arrow to indicate original rotation direction. Also place mating marks on timing belt and camshaft sprockets for reassembly reference. Remove timing belt tensioner, and set aside with push rod facing up. Remove timing belt.

CAUTION: To prevent air from entering timing belt tensioner, tensioner rod must always face up.

Installation

NOTE: This information outlines the proper steps to index the camshafts with the crankshaft. In the event that camshaft timing has been disrupted, due to timing belt breakage or camshafts/crankshaft being rotated without a timing belt, this is important prior to timing belt installation. Due to the gear-ration used by each camshaft pulley to drive the camshafts, engine timing cannot be indexed conventionally.

To compress tensioner pusher, place in soft-jawed vice. Slowly compress tensioner pusher pin until it lines up with the two small holes in tensioner pusher housing. Insert a straightened heavy duty paper clip through holes in housing. This will hold the pin in it's compressed position.

IMPORTANT: In the following procedure, the references to 9 or 12 O'clock positions are based on deck plane of the cylinder deck-to-cylinder head mating surface (as viewed from the front of the engine), and NOT relative to the shop floor.

Fig. 3: Timing Belt Installation Procedure (Steps 1-4)
Courtesy of ISUZU MOTOR CO.

Fig. 4: Timing Belt Installation Procedure (Steps 5-8)
Courtesy of ISUZU MOTOR CO.

Fig. 5: Timing Belt Installation Procedure (Steps 9-14)
Courtesy of ISUZU MOTOR CO.

Fig. 6: Timing Belt Installation Procedure (Steps 15-21)
Courtesy of ISUZU MOTOR CO.

Fig. 7: Timing Belt Installation Procedure (Steps 22-23)
Courtesy of ISUZU MOTOR CO.

Fig. 8: Timing Belt Installation Procedure (Steps 23 (Cont.)-24)
Courtesy of ISUZU MOTOR CO.

Fig. 9: Timing Belt Installation Procedure (Steps 25-26)
Courtesy of ISUZU MOTOR CO.

Fig. 10: Timing Belt Installation Procedure (Steps 27-28)
Courtesy of ISUZU MOTOR CO.

Fig. 11: Timing Belt Installation Procedure (Steps 29-30)
Courtesy of ISUZU MOTOR CO.

WATER PUMP
Removal & Installation
Drain cooling system.
Remove timing belt.
Remove idler pulley.
Remove water pump bolts, water pump and gasket.

To install, reverse removal procedure.
Ensure gasket surfaces are clean.
Tighten water pump bolts in sequence to specification.
See Fig. 15.
Fill cooling system and check system for leaks.

Engines should be set at the timing position prior to any removal work, these are an interference type engine, that is if the valve timing is not set correctly engine damage may occur as the valves will strike the pistons and they will bend. See pic for correct alignment, but I do feel that if it was more than a few teeth out you have now bent valves in the head.

Hi there,

if the timing belt is replaced there is no need to touch the computer, I would be checking that he has set the valve timing when the belt was refitted first.

Mark (mhpautos)

It would help if we had an engine size

Roy

4,000 miles and timing belt breaks is a good sign of the belt being installed incorrectly or the belt had a flaw in it prior to installation. In either event there is no way to prove whos at fault

Have a pro pressure check the coolant system for a head gasket leak

Plug in a scan tool that can read actual temperature from the computer and compare it to what it says on the dash. May just be a bad temp sensor. Are you sure you are burping the air out of the system?