Subaru XT 1988 Service Manual page 266

2-4
ENGINE LUBRICATION SYSTEM
SERVICE DATA
1800 cc model
2700 cc model
Inner rotor outer diameter
35.65 - 35.70 mm (1.4035 - 1.4055 in)
Outer rotor outer diameter
49.95 - 50.00 mm (1.9665 - 1.9685 in)
13.89 - 13.91 mm 18.89-18.91 mm
A
(0.5468 - 0.5476 in)
(0.7437 - 0.7445 in)
Inner and outer rotor height B
13.90 - 13.92 mm
18.90 - 18.92 mm
(0.5472 - 0.5480 in)
(0.7441 - 0.7449 in)
C
13.91 - 13.93 mm
18.91 - 18.93 mm
(0.5476 - 0.5484 in)
(0.7445 - 0.7453 in)
Oil pump case projection height
7.97 - 8.00 mm
2.97 - 3.00 mm
(0.3138 - 0.3150 in)
(0.1169- 0.1181 in)
Oil pump
Rotor housing depth
21.96 - 22.04 mm (0.8646 - 0.8677 in)
Side clearance between inner or outer
STD
0.05 - 0.16 mm (0.0020 - 0.0063 in)
rotor and crankcase
limit
0.18 mm (0.0071 in)
Case clearance between outer rotor
STD
0.10 - 0.18 mm (0.0039 - 0.0071 in)
and crankcase
limit
0.22 mm (0.0087 in)
Free length
47.1 mm (1.854 in) 52.2 mm (2.055 in)
Relief valve spring
I nstalled length
33.5 mm (1.319 in) 38.9 mm (1.531 in)
Load when installed
3.88 - 4.28 kg 6.15 - 6.75 kg
(8.56 - 9.44 Ib) (13.56 - 14.88 Ib)
Reference pressure with oil pump equipped on the engine is as follows:
Condition
1800 cc model
2700 cc model
Oil temperature
100°C (212°F)
Cooling fan
OFF
Engine oil
10W-30 (SAE)
2,000 rpm
206 - 304 kPa
382 - 490 kPa
(2.1-3.1 kg/cm2,30-44 psi)
(3.9 - 5.0 kg/cm 2 , 55.- 71 psi)
Engine speed
4,000 rpm
353 - 441 kPa 481 - 569 kPa
(3.6 - 4.5 kg/cm 2 , 51 - 64 psi)
(4.9 - 5.8 kg/cm2, 70 - 82 psi)
8