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INTERFERENCE ENGINES | Interference Engines
The AERA Technical Committee would like to offer the following information on engines that present the possibility of interference between pistons and valves. The interference or contact may bend valve(s) when the timing between the camshaft and crankshaft is interrupted. This is generally the result of a timing belt or chain breaking or slipping.
The following list are engines that AERA is currently aware of that have exhibited interference. There may be other engines that are not listed below that have the possibility of piston to valve contact. If the engine you are working on is not listed, do not assume that it is a freewheeling design. It is suggested to add to this listing as additional information is obtained.
ACURA
1986-89 1.6L Integra
1991-95 1.7L Integra
1990-95 1.8L Integra
1986-89 2.5L Legend
1992-94 2.5L Vigor
1986-89 2.7L Legend
1990 2.7L Legend
1991-95 3.0L NSX
1991-95 3.2L Legend
AUDI
1970-93 All Except 1970-77
1.9L & 1970-73 1.8L
BMW
1987-95 2.5L 325I 525I
1994-95 4.0L 740I
CHRYSLER
1993-95 1.5L Colt
1987-88 1.5L Colt
1992-95 1.5L Eagle Summit
1987-88 1.6L Colt
1989-92 1.6L Eagle Summit
1994-98 2.0L Neon Stratus
1990-95 2.0L Eagle Talon
DAIHATSU
1988-92 1.0L Charade
1988-92 1.3L Charade
1990-92 1.6L Rocky
FIAT
1974-79 1.3L 128 Series
1979-82 1.5L Stranda
1974-78 1.6L 124 Series
1974-78 1.8L 124 Series
1974-78 1.8L 131 Series, Brava
1979-82 2.0L Brava, Spider
FORD
1981-85 1.6L Escort, EXP
1981-83 1.6L LN7, Lynx
1984-85 2.0L Escort, Tempo
1993-95 2.0L Probe
1986-88 2.0L Ranger
1984-87 2.0L Lynx, Topaz Diesel
1985 2.2L Ranger
1989-92 2.2L Probe
1986-88 2.3L Ranger
1986-87 2.3L Diesel Ranger
1991-98 4.6L Crown Victoria
GM
1986-95 1.0L Geo Metro
1989-91 1.0L Firefly (CANADA)
1985-88 1.5L Sunburst (CANADA)
1985-89 1.5L Spectrum
1990-93 1.6L Prizm, Storm
1981-84 1.8L Diesel (CANADA)
1982-86 1.8L Buick Skyhawk
1990-98 1.9L Saturn
1987-88 2.0L Buick Skyhawk
1988-95 2.3L Quad Four
1985-87 3.0L Buick
1979-95 3.8L Buick
HONDA
1986-87 1.0L Prelude
1973-78 1.2L All
1973-78 1.3L All
1980-84 1.3L All
1973-78 1.5L All
1985-89 1.5L Civic
1988-95 1.5L Civic, CRX
1993-95 1.5L Civic Del Sol
1979-84 1.5L All
1985-87 1.5L CRX
1993-95 1.6L Civic Del Sol
1973-78 1.6L All
1980-82 1.6L All
1988-95 1.6L Civic, CRX
1984-87 1.8L Prelude, Accord
1979-83 1.8L All
1986-91 2.0L Prelude
1990-91 2.1L Prelude
1990-95 2.2L Prelude, Accord
1992-95 2.2L Prelude
1995 2.7L Accord
HYUNDAI
1984-95 1.5L Excel Scoupe
1995-98 1.5L Accent
1992-95 1.6L Elantra
1993-95 1.8L Elantra
1992-95 2.0L Sonata
1989-91 2.4L Sonata
1990-95 3.0L Sonata
INFINITI
1990-92 3.0L M30
ISUZU
1987-89 1.5L I-Mark
1990-93 1.6L Stylus Impulse
1987-89 2.0L Impulse
1981-87 2.2L Diesel Truck
1986-95 2.3L Truck Trooper
1988-95 2.6L Truck Rodeo Amigo
1991-96 3.2L Trooper Rodeo Amigo
KIA
1995 2.0L Sportage
MAZDA
1984-85 2.0L 626
1988-92 2.2L 626 MX6
1989-93 2.2L Pickup
1988-95 3.0L 929 MPV
MITSUBISHI
1985-95 1.5L Mirage Precise
1990-92 1.6L Mirage
1989-95 2.0L Galant Eclipse
1983-86 2.3L Diesel Pickup
1994-95 2.4L Galant
NISSAN
1982 1.5L Centra
1983-88 1.6L Sentra Pulsar
1987-89 1.8L Pulsar
1982-89 2.0L Stanza 300ZX
1984-95 3.0L Maxima 300ZX Pathfinder
PORSCHE
1976-83 2.0L 924
1976-89 2.5L 944 Series
1989 2.7L 944 Series
1989-91 3.0L 944 Series
1976-83 4.5L 928
1984 4.7L 928
1985-91 5.0L 928
1992-95 5.4L 928
SUZUKI
1985-94 1.3L Samurai Sidekick
1989-94 1.3L Swift
TOYOTA
1986-95 1.5L Tercel
1981-83 2.2L Pickup
1984-87 2.4L Pickup
1982-88 2.8L Celica Cressida
1987-94 3.0L 4-Runner
VOLKSWAGEN
1976-91 All Except 1.9 2.1L Engine
1990-92 1.6L Golf (CANADA) Jetta
1990-95 2.0L GTI Jetta GLI Passat
VOLVO
1991 2.3L Coupe 940
1986-94 2.3L 240 740 940
The AERA Technical Committee | |
CHECKING VISCOUS VIBRATION DAMPERS | Procedure For Checking The Condition Of
Viscous Vibration Dampers
Dimensional analysis of a large number of failed viscous vibration dampers has revealed that a viscous damper's condition can be accurately evaluated by measuring its thickness. This measurement will expose any deformation or raising of the viscous damper's front cover plate. Front cover plate movement, as shown in Fig. 1, is caused by the gellation and resulting expansion of
the silicon fluid contained in the damper. This fluid change of state is the result of continuous high frequency shearing of the fluid between the inner ring and the damper housing under normal operating conditions. Consequently, the silicon fluid gells and expands, distorting the front cover plate or forcing it outward. These symptoms indicate that the internal members of the damper are inoperative and the damper is no longer effective in reducing torsional vibrations. As an inoperative damper will most likely lead to major engine or driveline failures, it must be replaced.
The following checks should be performed:
1. Before removing the viscous damper from the engine, visually inspect the
damper for a deformed or raised front cover plate. If the lack of space around
the damper will not permit a visual inspection, run a finger around the inside
and outside edges of the front cover plate, as shown in Fig. 2, and note any
variations in surface flatness. If any variations are detected, or if there is any
question as to whether or not the front cover plate has deformed or raised,
remove the damper from the engine and proceed with step 2.
2. Remove the paint and accumulated dirt from both front and rear surfaces of
the damper in four equally spaced areas, as shown in ig. 3 (avoid areas with
stamped lettering). This will allow for precise measurement of the damper's
thickness with micrometer.
Caution: Course emery cloth or scraper should not be used as they may remove excess material from the surfaces. Use a paint solvent and fine (240 grit) emery cloth.
3. Measure and record the thickness of the damper at each of the four equally
spaced areas approximately 0.125 (3.18mm) from the outside edge of the
front cover plate as shown in Fig. 4.
4. Replace the damper if the variation in the four thickness dimensions exceed
0.010 (0.25mm) or if any of the thickness dimensions exceeds those listed in
the table below.
Viscous vibration dampers should be checked:
1. At 150,00 miles (241,500 km).
2. At any time the damper is removed from the engine.
3. At any time the engine experiences the following
problems:
a. Gear train failure.
b. Accessory drive shaft failure.
c. Crankshaft failure.
d. Damper mounting capscrew failure.
e. Flywheel mounting capscrew failure.
Viscous vibration dampers should be replaced at recommended change
interval of 300,000 (483,000 km) regardless of condition. Gellation of the
damper's silicon fluid occurs after extended service because of the high shear rates and resulting high temperatures imposed on the fluid during normal damper operation and, if the damper has not failed at this time, its failure is
imminent.
Viscous Vibration Damper Thickness Specifications
Damper Part Maximum Allowable
Number Thickness
-------------------------------------------------
20633-1 1.981 (50.32mm)
20634-1 1.644 (41.76mm)
20835-1 1.142 (29.01mm)
145789 1.663 (42.24mm)
190213 1.663 (42.24mm)
207531 2.574 (65.38mm)
210758 1.550 (39.37mm)
211268 1.663 (42.24mm)
211914 1.981 (50.32mm)
211915 1.550 (39.37mm)
211916 1.663 (42.24mm)
217321 1.663 (42.24mm)
217322 1.663 (42.24mm)
217323 1.663 (42.24mm)
218755 1.663 (42.24mm)
(Note: the following is a supplement to TB 159 and is on a separate bulletin)
Procedure for checking the condition of viscous vibration dampers:
Delete the maximum allowable thickness specs for damper Part No. 21195 in the above table.
Cummins amended data concerning proper thickness of Part No. 211915 as follows:
Due to vendor manufacturing differences 211915 vibration damper maximum allowable thickness depends upon the style of the damper here the mounting flange joins the housing and vendor Part No. 709555, have a maximum allowable thickness of 1.570 (39.88mm). Cast and machined type 211915 vibration dampers (vendor Part No. 707843) have a maximum allowable thickness of 1.550 (39.37mm).
The AERA Technical Committee | |
FLYWHEEL SPECIFICATIONS | Flywheel Specifications For Massey Ferguson Tractors
The following chart of new flywheel specifications may be referred
to when surfacing or machining flywheels on Massey Ferguson
agricultural and industrial tractors.
Tractor Cup/Step (B)
Model Dimension Comments. (A: min. thickness)
20 Flat Single Clutch
20 & 20C 1.717-1.723 Dual Clutch
20C 1.127-1.147
20D & 30E 1.156-1.167
30E .059-.099
30B & 35 1.717-1.7231 Dual Clutch
40B 1.397-1.417 Single Clutch
40 & 40B 1.717-1.723 Dual Clutch
40 Flat Dual Clutch
50D, 50E, 50F .059-.099
50E 1.156-1.157
50C 1.397-1.417
50 1.717-1.723
90 .423-.453
135 & 150 1.717-1.723 Dual Clutch
135 & 150 1.127-1.147 Single Clutch
135 Flat Single Clutch
154-4 .196-.198
165U Flat
165,175, 180 1.397-1.417 Single Clutch
165, 175,180 1.717-1.723 Dual Clutch
184-4 .1968
203 Flat Single Clutch
203, 235, 245 1.717-1.723'1 Dual Clutch
205 Flat
231 1.560-1.565 Dual Clutch, (A: .895 min.)
235 & 245 1.127-1.147 Single Clutch
240 1.560-1.565 Dual Clutch, Single disc (A:
.895 min.)
250 1.560-1.565
253 1.560-1.565 Dual Clutch, (A: .895 min.)
264-4 & 274-4 .196-.198
255 & 265 1.717-1.723 Dual Clutch
255 & 265 1.397-1.417 Single Clutch
270 1.565-1.570
275 1.560-1.565
285 1.386-1.426
290 1.565-1.570 Single & Dual Clutch
294-4 .196-.168 Dual Clutch
298 & 302 Flat Single Clutch
302 1.717-1.723 Dual Clutch
360 1.560-1.565 Single & Dual disc,(A:.850min)
375 & 390 1.560-1.565 Single & Dual disc,(A: .520min)
390 1.600 Single & Dual disc.
670 1.560-1.565
698 Flat
699 .120-.140
1020 Flat Single disc,(A: 1.200 min.)
1030 Flat Single disc,(A: 1.337 min.)
1035 -.079 Single disc,(A: .904 min.)
1045 -.079 Single disc,(A: 1.082 min.)
1080 & 1085 1.386-1.426
1100 & 1130 .410-.435 Single disc.
1100 & 1130 1.035-1.045 Double disc.
1105 1.182-1.192 Double disc.
1135 1.182-1.192 Single disc.
1140 & 1145 .026 Single disc,(A: 2.020 min.)
1150 1.035-1.045 Single disc.
1155 1.182-1.192 Single disc.
1805 .125
2135 1.717-1.723 Dual Clutch
2135 Flat Single disc.
2200 1.717-1.723 Dual Clutch
2640 1.407-1.411 M92 flywheel
2640 1.338-1.342 Plus 3 (.070) shims used
2675 & 2706 1.830-1.840
2745,2775,2805 2.890-2.900
3060 & 3070 1.342-1.346 Single disc, (A: 1.022: min.)
3090 1.342-1.346 Single disc, (A: 3.914 min.)
3120 & 3140 Flat Single disc, (A: 1.534 min.)
3165 1.717-1.723
3505,3525,3545 1.338-1.342 Plus 3 (.070) shims used
3505,3525,3545 1.407-1.411 M92 flywheel
3630,3650,3660 1.407-1.411 Single disc, (A: 2.229 min.)
3680 .016-.024 Dual clutch, (A: 3.375 min.)
TO30 1.123-1.127 Early Model
TO30 1.717-1.723 Late Model
The AERA Technical Committee |
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