Mazda RX7. Manual - part 26

1.1L ROTARY

Article Text (p. 18)

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 04:57PM

Fig. 26: Tightening Sequence of Tension Bolts
Replace all tension bolt sealing washers when the engine is
overhauled.

Flywheel Counterweight Installation (Man. Trans.)
1) Apply engine oil to oil seal in the rear housing. Mount
flywheel to rear end of eccentric shaft so that key fits into flywheel
keyway.
2) Apply sealing agent to lock nut surface that contacts
flywheel. Hold flywheel with ring gear brake (49 1881 060), and
tighten lock nut to specifications.
3) Hold clutch disc in position with clutch disc centering
tool (49 0813 310 or equivalent). Mount clutch cover and pressure
plate assembly on flywheel, and align the "O" marks of clutch cover
and flywheel.
4) Install 4 standard and 2 reamer bolts finger tight. To
avoid distortion of pressure plate cover, tighten bolts in steps, a
few turns at a time, until all are tight.

Flywheel Counterweight Installation (Auto. Trans.)
1) Apply engine oil to oil seal in rear housing. Fit key to
eccentric shaft. Install counterweight to eccentric shaft. Apply
sealing agent to lock nut surface that will contact counterweight and
install lock nut.
2) Hold counterweight with stopper (49 1881 055), and tighten
lock nut. Install drive plate to counterweight so hole in
counterweight and drive plate line up.

Eccentric Shaft End Play Adjustment
1) Turn engine so front is up. Install thrust plate with

1.1L ROTARY

Article Text (p. 19)

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 04:57PM

chamfer downward. Slide spacer and needle bearing on eccentric shaft.
Lubricate shaft and bearings, and install bearing housing.

NOTE: If bearing housing has not been removed, use care that
center of needle bearing in bearing housing comes to center
of eccentric shaft and that spacer is seated to thrust plate.

2) Lubricate and install needle bearing, thrust washer, and
balance weight on shaft. Install keys in oil pump and eccentric shaft
keyways. Place oil pump drive chain on oil pump sprocket and eccentric
shaft sprocket. Install sprockets on shafts.
3) Align the keyways of eccentric shaft sprocket and balance
weight. Install key. Install distributor drive gear, with "F" mark on
gear facing front of engine. Install eccentric shaft pulley on shaft.
Use new washer, and tighten pulley bolt to specification.
4) Turn engine so top is upward. Attach a dial indicator on
the flywheel or counterweight so it contacts rear housing. Move
flywheel or counterweight back and forth.
5) Standard end play is .0016-.0028" (.04-.07 mm). If end
play is more than .0035" (.09 mm) grind spacer on surface plate with
emery paper or install thinner spacer. If end play is less than .0016"
(.04 mm), install thicker spacer.
6) Oversize spacers are available in 5 sizes from .3181" to .
3150" (8.08 mm to 8.00 mm) and are identified by stamped letter "X",
"K", "Y", "V", and "Z" respectively. When spacer has been installed,
recheck end play.

Fig. 27: Measuring Eccentric Shaft End Play
Standard end play is .0016-.0028" (.04-.07mm).

1.1L ROTARY

Article Text (p. 20)

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 04:57PM

NOTE: If end play is below specified amount, spacer thickness is
too small. If end play is beyond specifications, spacer is
too thick.

Installing Front Cover & Eccentric Shaft Pulley
1) Turn engine so front is upward. Remove eccentric shaft
pulley. Tighten oil pump sprocket nut and bend tab of lock washer.
2) Check oil pump drive chain slack by pressing finger
against chain. See Fig. 29 Chain slack measurement should not exceed .
47" (12 mm). If the slack exceeds the limit, replace drive chain.
3) Install new "O" ring on front housing oil passage. Install
front cover and gasket on front housing. Lubricate oil seal in front
cover. Install eccentric shaft pulley on shaft. Use new washer and
tighten pulley bolt.

Installing Oil Strainer & Oil Pan
1) Invert engine so that bottom of engine is up. Install oil
strainer gasket and strainer on front housing. Cut off excess gasket
along mounting surface of oil pan.
2) Apply a .16-.24" (4-6 mm) bead of sealer on mounting
surface of oil pan (to the inside of pan bolt holes) and install
gasket. Apply a similar bead of sealant to gasket. Install pan and
tighten bolts.

Installing Water Pump
Turn engine upright, position gasket and water pump on front
housing and tighten attaching bolts.

NOTE: For further information on cooling system components, see
Cooling System in this article.

Installing Distributor
1) Rotate eccentric shaft until yellow mark (leading timing
mark) on pulley aligns with indicator pin on front cover. Align notch
on distributor housing with punch mark on driven gear.
2) Insert distributor and lock nut. Turn distributor housing
until a trigger wheel blade aligns with pick-up coil. Tighten lock
nut.

Installing External Components
1) Install exhaust manifold, engine mount, intake manifold
with carburetor, and alternator and drive belt. Check clearance
between alternator support and bracket. Limit is .0059" (.15 mm).
Adjust with shim if necessary.
2) Install air pump and drive belt. oil filter assembly and
all other external components. Before removing engine from stand,
install engine hanger bracket to front cover.

ENGINE OILING

CRANKCASE CAPACITY

1.1L ROTARY

Article Text (p. 21)

1983 Mazda RX7

For www.iluvmyrx7.com

Sunday, August 26, 2001 04:57PM

The crankcase capacity is 4.9 quarts (4.6L), including
filter.

OIL FILTER

A full-flow, disposable cartridge-type filter is mounted on
the rear housing.

NORMAL OIL PRESSURE

Normal oil pressure is 10-26 psi (.7-1.8 kg/cm

) at idle

speed, 64-78 psi (4.5-5.5 kg/cm

) at 3000 RPM.

ENGINE OILING SYSTEM

Engine oiling system is forced circulation using a 2 rotor
type oil pump. Oil pump is mounted on front housing and is chain
driven through eccentric shaft. The oil pressure is maintained through
a regulator valve and pressure control valve. A full flow oil filter
and oil cooler are mounted on the rear housing.
Oil is directed from the oil pump to the oil pressure control
valve in the front cover. The oil then flows to the oil filter/cooler
assembly on the rear cover which directs lubricating oil to all
internal parts. The pressure regulator valve in the rear cover acts as
a secondary pressure regulation device.
The oil pressure control valve is designed to open at 114 psi
(8 kg/cm

). The free length of the control valve spring should be 2.

74" (69.6 mm). Never use an oil pressure control spring from a
previous year in a 1983 model. The cap bolt and spring are painted
yellow in 1983. The oil pressure regulator valve will relieve pressure
at 71.1 psi (4.9 kg/cm

). Its spring free length should be 1.83" (46.4

mm).
The engine is equipped with a metering oil pump which
regulates the amount of oil pumped to the float chamber of the
carburetor. The oil enters the combustion chamber with the air/fuel
mixture to lubricate the seals within the chamber. The amount of oil
increases as engine RPM increases. The metering pump control lever is
actuated by a rod connected to the throttle lever.

Content .. 24 25 26 27 ..