I explain what I learned reading the 1990 1HZ workshop repair manual about putting a new belt on and timing it.
These is a number of confusing videos around of ppl describing to put the timing belt on using referencing TDC as the marks on the pullies to line the belt up. The manual states it is Bottom Dead Center!!! to align the belt. NOT Top Dead Center.
The reason ppl have gotten confused rightly so is because the BDC flathead screw-head slot that is used it actually at the top on the motor area, same as the lower pully. I was even very confused myself.
To time the injector pump all three pulleys align to TDC, the two belt pulleys marked TDC and the main lower big crankshaft pully has a ‘v’ mark.
1). Align all three to TDC. Top Dead Center. About 9 o’clock on the belt pulley!!
2). Take bolt out of the Center back on the injector pump and insert and screw in dial indicator. In the Center of the 6 injector lines going off the pump!
3). Turn main big crankshaft with a big socket backwards slowly watching the dial go backwards until it stops.
4). Zero the gauge at this location. By twisting the face of the gauges zero to where the hand is pointing!
5). Not move the crankshaft forward to TDC again.
6). Undo nuts and bracket that holds injector pump and twist pump until it goes to between 1.03 and 1.09. Tighten nuts to pump and brackets again. Pump should be now tuned.
7). Repeat these steps again to check.
My 1HZ 2000 Toyota Coaster is bit tricky to do this as have to take the radiator out and fan and not much room in there getting under on the ground.
This timing applies to a 1HZ Land-cruisers as well.
Негізгі бет Үй жануарлары мен аңдар 1HZ Belt Timing & Injection Pump Timing
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