| The following technical bulletins were published by AERA. |
| | 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 | | BALANCE SHAFT SEAL CAUTION | Balance Shaft Seal Caution For
1990-99 Honda 1.5, 1.6, 2.2 & 2.3L Engines
The AERA Technical Company offers the following information on a balance shaft seal caution for 1990-99 Honda 1.5, 1.6, 2.2 & 2.3L engines. This caution is expressed as the oil seal used for the front of the balance shaft may become dislodged, creating engine oil loss. In severe situations, engine damage has resulted before a leak was noticed.
Apparently, the seal retention is questionable on these engines and the seal may move within its housing at an undetermined time. To resolve this situation, Honda suggests installing a retaining clip within the seal housing to prevent the seal from moving. The repair involves removing the front timing belt cover and installing the clip. As the result of these seals moving Honda published a service bulletin describing the use of a new seal installer, Part #TN 07XAF-PT00100. This installer positions the seal deeper within the timing cover to allow room for the clip.
AERA is aware of another source for components regarding a similar repair of this condition, it involves bolting on a retaining plate as shown below.
The AERA Technical Committee | | CYLINDER HEAD INSTALLATION CAUTION | Cylinder Head Installation Caution For
1992-95 Honda 1.6L D16DZ Engines
The AERA Technical Committee offers the following information regarding a cylinder head installation caution for 1992-95 Honda 1.6L D16DZ engines. This caution is expressed for engines that have had either machining of the block or head surfaces. It has been reported that interference between the intake manifold and the cylinder block may prevent the head from properly clamping the block.
In many instances, the intake manifold is attached to the cylinder head before that assembly is installed onto the block. If that is attempted, the intake manifold may contact the block in three areas while the head is tightened down. The areas are one at each end and one in the middle portion of the intake manifold and the interference may not occur until the head gasket is compressed.
Depending upon the amount of interference, the engine may start up and seem to run normally until the engine warms up completely. If the interference is excessive, coolant will flow out between the head and block when the cooling system is being filled. To repair this condition shops have used a portable grinder to remove manifold material until the additional clearance required is obtained.
The AERA Technical Committee | | SEIZED CAMSHAFTS ON 2.2L HONDA ENGINES | Seized Camshafts On
1990-99 Honda 2.2L Engines
The AERA Technical Committee offers information that may reduce the possibility of seized camshafts on 1990-99 Honda 2.2L engines. This engine uses a metered oil supply to the cylinder head by means of a restrictor located in the deck of the cylinder block.
Through time, the small hole in this restrictor may become partially blocked and limit the amount of oil flow to the cylinder head. Eventually, after many engine starts, a dry start condition may exist and cause a journal to score its camshaft bore.
Some AERA members are increasing the opening size of this oil restrictor anytime the cylinder head is removed from the block. Drilling the existing restrictor to .062 (1.575 mm) in size will increase the volume of oil to the cylinder head and camshaft. This should not overwhelm the cylinder head with oil, providing all other oil clearances are within specifications. This procedure has been done many times and should help prevent a seized camshaft journal in this head. Using heavier viscosity engine oil than called for cab also detrimental, as it does not flow quickly in colder ambient temperatures.
Figure 1. Oil Restrictor Removed
The AERA Technical Committee | | CRANKSHAFT IDENTIFICATION | Honda Crankshaft Identification
The AERA Technical Committee offers the following information on crankshaft identification for Honda four cylinder engines. Generally, there are no reliable casting numbers on Honda crankshaft and physical identification is required if the engine family is not known. In some instances, there may be a difference in crankshafts for the same engine family. Refer to the chart below to assist in
crankshaft identification, all dimensions are given in inches.
Total Length Flange Bolts
Nose Dia. Counterweights
Main Size Oil Pump Drive
Rod Size cc Displ.
Stroke Year Engine Model
---------------------------------------------------------------
16.5 .865 1.968 1.574 2.992 6 4 No 1169 1972-79 EB, EE
16.5 .865 1.968 1.574 2.992 6 4 No 1238 1972-79 EB, EE
16.6 .865 1.968 1.574 3.228 6 4 No 1300 1980-83 EJ, EN
16.6 .865 1.968 1.574 3.228 6 4 No 1335 1980-83 EJ, EN
16.6 .865 1.968 1.653 3.405 6 4 No 1488 1974-83 ED, EM
16.6 .865 1.968 1.653 3.396 6 8 No 1601 1980-83 EP
16.6 .865 1.968 1.653 3.661 6 8 No 1599 1976-78 EF
16.6 .865 1.968 1.653 3.700 6 8 No 1751 1980 EK, W/10mm Fly/Bolts
16.6 .865 1.969 1.653 3.700 6 8 No 1751 1981-83 EK, W/12mm Fly/Bolts
17.5 .865 1.771 1.495 3.326 6 4 Yes 1493 1988-92 D15B1, D15B2
17.5 .865 1.771 1.574 3.070 6 4 Yes 1342 1984-87 D13A2, EV1
17.5 .865 1.77I 1.653 3.405 6 4 Yes 1488 1983-87 D15A1, EW1, EW3
17.5 .865 1.771 1.653 3.150 6 4 Yes ??? ??? EXPORT
17.5 .865 1.969 1.653 3.405 6 4 Yes 1488 1983-87 D15A1, EW1, EW3
17.5 .944 1.771 1.653 3.405 6 8 Yes 1488 1983-87 D15A1, EW1, EW3
17.6 .865 1.771 1.495 3.070 6 4 Yes 1342 1984-87 D13A2, EV1
17.6 .865 1.771 1.653 3.326 6 8 Yes 1493 1988-92 D15B1, D15B2, D15B6
17.6 .865 1.968 1.574 3.070 6 4 Yes 1342 1984-87 D13A2, EV 1
17.6 .865 2.165 1.771 3.543 6 8* Yes 1590 1988-93 D16 SERIES
17.6 .865 2.165 1.771 3.543 6 8**Yes 1590 1988-93 D16 SERIES
17.6 .944 1.771 1.495 3.326 6 4 Yes 1493 1988-92 D15B1, D15B2, D15B6
17.6 .944 1.771 1.653 3.326 6 8 Yes 1493 1988-92 D15B1, D15B2, D15B6
17.6 .944 2.165 1.771 3.543 6 8**Yes 1590 1988-93 D16 SERIES
17.6 .944 2.165 1.771 3.543 6 8* Yes 1590 1988-93 D16 SERIES
17.8 .984 1.968 1.771 3.582 8 8 No 1955^ 1986-89 BS, BT, A20A1, A20A3
17.8 .984 1.968 1.771 3.582 8 8 No 1955^^ 1986-89 BS, BT, A20A1, A20A3
18.5 1.102 2.165 1.771 3.740 8 8 Yes
18.7 1.181 1.969 1.771 3.543 7 8 Yes
19.9 1.102 2.165 1.771 3.503 8 8 Yes 1834 1985-88 B18A
18.9 1.102 2.165 1.889 3.740 8 8 Yes 2056 1990-91 B21A1
19.6 1.181 1.968 1.771 3.567 8 8 Yes 2259 1992-94 B23A1
19.6 1.181 1.968 1.989 3.740 8 8 Yes 2156 1993-95 H22A1
* All Counterweights Are 1.750 Long.
** Second Counterweight is 1.125 Long.
*** Oil Pump is Two Flat Areas Machined Between #1 Main and Pulley
Snout
^ Has 11.5mm Crankshaft Pulley Bolt 11.5mm.
^^ Has 14mm Crankshaft Pulley Bolt 14mm.
The AERA Technical Committee | | VALVE REUSE GUIDELINES | Valve Reuse Guidelines On
Honda Engines
The AERA Technical Committee is informing members of suggested valve reuse specifications on Honda engines. Unless service manuals provide specific measurements, the following guidelines for valve margin thickness should be considered:
Engines older than 1987: Discard the valve when the valve margin reaches .008 (.2mm) less than original thickness.
1987 and newer engines: The minimum valve margin is
.045 for intake and exhaust valves.
The valve stem and keeper grooves should also be inspected for wear when considering valve reuse.
AERA Technical Committee | | SEIZED CAMSHAFTS | Seized Camshafts On
1984-93 Honda 1.5L Engines
The AERA Technical Committee offers information that may reduce the possibility of seized camshafts on 1984-93 1.5L Honda engines. This engine uses a metered oil supply to the cylinder head by means of a restrictor located in the deck of the cylinder block.
Through time, the small hole in this restrictor may become partially blocked and limit the amount of oil flow to the cylinder head. Eventually, after many engine starts, a dry start condition may exist and cause a journal to score its camshaft bore.
Some AERA members are increasing the opening size of this oil restrictor anytime the cylinder head is removed from the block. Drilling the existing restrictor to .062 (1.575 mm) in size will increase the volume of oil to the cylinder head and camshaft. This should not overwhelm the cylinder head with oil, providing all other oil clearances are within specifications. This procedure has been done many times and should help prevent a seized camshaft journal in
this engine.
The AERA Technical Committee |
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