Question about 1991 Toyota 4Runner

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Instillation of bracket idler also known as fan pulley bracket of 1991 toyota 3VZE motor.Part is bracket sub assembly OEM part #16307-65020. I removed the part after I changed my water pump and timing belt. I ran the truck when the pulley on this assembly froze I removed the part dis assembling the radiator, fan, timing belt cover and loosened the belts and such. I went to toyota and found that the part cost almost a $1000. I tried 3 different after market products but the bolts never matched up. I finally bought the OEM part after saving for the last 8 months. Problem is if I pull it apart and put it back then I can do it However so much time has transpired I am not sure how everything goes back exactly. If I had a blow up diagram I think I can do it but at this time I dont want to ruin anything, Please help if you can Thank You Paul

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Due to the age of this truck no diagrams are avial anymore, I can direct you to a used factory repair manual however, this will have all the information you need and is a valuable resource for any future problems u need to fix, it is a CDROM copy of the factory manual.
Only $19.95

Posted on Jul 08, 2010

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1 Answer

Idler pulley bracket where can I buy one or is there an alternative to it

you need to post year, make, model and what engine?
also which idler pulley? I'm guessing you're probably looking at the accessories drive belt ("fan belt") idler pulley bracket.
Is this a serpentine belt.
a lot of cars use Idler and or tensioner pulleys on the timing belt/chain. the Idlers often don't have brackets
why are you replacing the bracket? did you break it? or do you just need the pulley? I normally replace both pulleys (idler and tensioner) when replacing either one.
anyways.. need a lot more info to answer your question

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Change water pump

no year, stated, nor engine option so all answers will be weak to useless..... posting country helps too as other countries use different engine.... so....... be the first ever in 8000 post to do that... ill be shocked.
its in the book, its not simple like my jeeps.
its a PITA.
but you can read the words, all of them all the steps
in the FSM or at

i log in , and put in year, and camry.
i pick cooling , i pick 1mZ engine.
i then see?///??????? (random pasted) you can too, or get and FSM.

1MZ-FE And 3MZ-FE Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
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    • RH front wheel
    • RH fender apron seal
    • A/C drive belt
    • PS drive belt
    • Engine stabilizer control rod
    • RH engine stay
    • Alternator bracket #2
    • Crankshaft pulley
    • Both timing belt covers
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    • Timing belt, guide and idler pulley sub-assembly #1
    • Camshaft timing pulleys and idler pulley sub-assembly #2
    • Timing belt cover #3
    • Water pump assembly
To install:
  1. Install or connect the following:
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    • Timing belt idler #1. Torque to 25 ft. lbs (24 Nm).
    • Timing belt cover #3
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  2. Refill the cooling system to the correct level.
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on my car , belt off, pump out, and in, done.

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1 Answer

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Apr 17, 2010 | 1991 Lexus LS 400

1 Answer


yes the entire idler arm needs replacement to clear this problem.
there are many things to be checked
just click this link directly
you will need to remove the alternator to replace the idler arm pulley
Disconnect the negative, then the positive battery cables.
Remove the battery from the vehicle.
Remove the battery tray using the following procedure:
Remove the four battery tray bolts.
Remove the battery tray from the vehicle.
Remove the serpentine drive belt.
Remove the cooling fan assembly using the following procedure:
Remove the wishbone-shaped engine mount strut by removing the bolts and nuts at the engine mount bracket and on the upper radiator support.
Remove the strut from the vehicle.
Disconnect the cooling fan harness from the engine wiring harness.
Reposition the wiring harness at the upper radiator support.
Remove the cooling fan shroud bolts.
Remove the right side radiator bracket.
Remove the cooling fan shroud with the electric cooling fan motors and fans as an assembly.
Remove the thermostat housing and the radiator hose using the following procedure.
Partially drain the engine coolant.
Use hose clamp pliers to remove the radiator hose clamp to the water inlet housing and disconnect the radiator hose.
Use hose clamp pliers to remove the heater hose clamp to the water inlet housing and disconnect the heater hose from the water inlet housing.
Use hose clamp pliers to remove the surge tank inlet hose clamp from the water inlet housing and disconnect the surge tank hose from the water inlet housing.
Remove the water inlet housing bolts and remove the water inlet housing.
Remove the outboard generator bolt and loosen the inboard bolt.
Remove the idler pulley bolt and idler pulley.
Unplug the electrical connector from the alternator.
Pull back the protective boot from the alternator "BAT" terminal, remove the nut and disconnect the heavy "BAT" wire from the alternator terminal stud.
Remove the alternator from the vehicle.
To Install:
Position the alternator to the engine.
Plug in the electrical connectors and install the heavy "BAT" wire to the alternator terminal stud. Tighten the nut to 15 ft. lbs. (20 Nm). Press the protective boot back in place over the stud terminal and nut assembly.
Install the outboard alternator bolt into the alternator housing.
Install the inboard alternator bolt and then finger-tighten the outboard bolt.
Install the idler pulley and idler pulley bolt.
Tighten the bolts in the following torque sequence:
Tighten the idler pulley bolt to 37 ft lbs. (50 Nm).
Tighten the alternator bolts to 37 ft. lbs. (50 Nm).
Install the water inlet and thermostat housing and the radiator hose, observing the following:
Inspect and clean the mating surfaces on the thermostat cover and its mounting surface on the engine.
Use RTV Sealer GM #1052366 or equivalent on the mounting bolts since the threaded openings are open to the cooling system and the torque requirement is low.
Install the water inlet and thermostat housing and tighten the bolts to 80 inch lbs. (9 Nm).
Connect the surge tank inlet hose to the water inlet housing.
Connect the heater hose to the water inlet housing.
Connect the radiator hose to the water inlet housing.
Install the cooling fan assembly and tighten the radiator bracket bolts to 80 inch lbs. (9 Nm). Plug in the wiring harness at the upper radiator support. Plug in the cooling fan wiring harness to the engine wiring harness.
Install the engine mount strut bracket to the upper radiator support first, insert the through bolt. Attach the engine side of the strut to the engine mount strut bracket on the engine and install the through bolt. Thread the nuts on the through bolts and tighten to 35 ft. lbs. (48 Nm).
Install the battery tray and tighten the bolts to 44 inch lbs. (5 Nm).
Install the battery.
Install the serpentine drive belt.
Connect the positive, then the negative battery cables.

This will help. Thanks please keep updated. please do rate the solution positively .thank you for using fixya.

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1 Answer

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1 Answer

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