Toyota 1C - Disassembly of Oil Pump

LU-6 LUBRICATION SYSTEM - Oil Pump
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5. REMOVE NO. 1 OIL PAN
(a) Remove the bolts and nuts.
lb) Insert the blade of SST between the No. 1 oil pan, No.
2 oil pan and cylinder block, cut off the sealer and
then remove the No. 1 oil pan.
SST 09032-00100
6. REMOVE OIL STRAINER
Remove the two bolts. two nuts and oil strainer with the
gasket
7. REMOVE NO. 2 OIL PAN
la) Remove the four bolts.
(bl Using SST. remove the No. 2 oil pan in the same pro-
cedure lstep 5).
SST 09032-00100
NOTE:
• Do not use SST for the oil pump body side. If necessary,
use a screwdriver.
• When removing the oil pan. be careful not to damage
the oil pan flange .
8. REMOVE OIL PUMP
(a) Remove the eleven bolts and alternator stay.
lb) Using a plastic hammer. carefully tap off the oil
pump and remove il
CAUTION:
• Be carefu l not to damage the crankshaft oil seal
with the crankshaft woodruff key.
• Do not drop the driven rotor.
LUBRICATION SYSTEM - Oil Pump
DISASSEMBLY OF OIL PUMP
(See page LU-5!
1. REMOVE PULLEY AND ROTORS
la) Pull out the driven rotor .
LU-7
(bl Hold the pulley in a soft jaw vise, and remove the nut
CAUTION: Be careful not to scratch the pulley.
If the pulley is scratched, repair it with sandpapet'
(#400).
(cl Pull out the drive rotor and pump body.
2. REMOVE RELIEF VAL VE
Unscrew the relief valve pulg and remove the .spring and
relief valve piston
INSPECTION OF OIL PUMP
1. MEASURE BODY CLEARANCE
Using a feeler gauge, measure the clearance between the
driven rotor and pump body .
Maximum clearance: 0.20 mm (0.0079 in.I
Standard clearance: 0 .10 - 0.17 mm
10.0039 - 0.0067 in.I
If the clearance is greater than the maximum, replace the
oil pump rotor set and/or pump body.
2. MEASURE TIP CLEARANCE
Using a feeler gauge, measure the clearance between both
rotor tips.
Maximum clearance: 0.20 mm {0.0079 In.)
Standard clearance: 0.05 - 0.15 mm
(0.0020 - 0.0059 in.)
If the clearance is greater than the maximum. replace the
oil pump rotor sel
3. MEASURE SIDE CLEARANCE
Using a feeler gauge and flat block , measure the side
clearance as shown .
Maximum clearance : 0 .15 mm (0.0059 in.)
Standard clearance: 0.03 - 0.09 mm
(0.00 12 - 0.0035 in.)
If the clearance is greater than the maximum, replace the
rotor and/or pump body .