| LARGER CRANKSHAFT JOURNAL DIAMETER FOR 1.8L KIA ENGINES |
Larger Crankshaft Journal Diameter for
1995-2002 Kia 1.8L VIN 5 Engines
The AERA Technical Committee offers the following information on a larger crankshaft journal for 1995-2002 Kia 1.8L VIN 5 engines. The main journal diameter for the crankshaft of this engine increased in diameter beginning with the 1998 model year. Mazda manufactured engines used prior to 1998 and Kia manufactured subsequent engines.
Caution should be used when ordering replacement parts including crankshafts and main bearing sets as aftermarket catalogs may not reflect two different part numbers for the different years.
Application Main Journal Diameter Rod Journal Diameter Stroke
1994-97 1.9661-1.9668 1.7693-1.7699 3.346 (49.939-49.957 mm) (44.94-44.955 mm) (85 mm)
Main set 0K2YA11SG0
1998-02 2.1629-2.1636 1.7693-1.7699 3.430
(54.938 - 54.956 mm) (44.94-44.955 mm) (87 mm)
Main set 0K2Y211SG0
Kia indicates connecting rod and main bearings are available in standard, .010 (.25 mm), .020 (.050 mm) & .030 (.75 mm) undersizes. Reference to the sizes listed in the Kia service manual should not be used for grinding, as they?re incorrect.
The AERA Technical Committee |
| CAMSHAFT TIMING PROCEDURE |
Camshaft Timing Procedure For
1995-2000 Kia 2.0L VIN 3 Engines
The AERA Technical Committee offers the following information on camshaft timing for 1995-2000 Kia 2.0L VIN 3 engines. This engine is a dual overhead camshaft (DOHC) design. Maintaining the camshaft timing during belt installation is crucial. Previously published service information has been reported to be incomplete.
The camshaft sprockets for this engine are I for the intake cam and E for the exhaust cam as shown in Figure 1 below. The sprockets, however, have two locator notches machined 180° from each other within the inside bore diameter. Previously published information does not include the pin location of each camshaft. The correct location for the camshaft locating pin is up and pointing toward the I & E on the cam sprocket.
Timing belt installation is best done with four hands if the camshaft positioner tool Part # is not available. It is extremely important to keep the belt taut on the belt tensioner side while installing the timing belt.
1. Position cam sprockets on camshafts with cam locating pin up towards I &
E, and then torque the bolt to 42 ft/lbs (56 N.m).
2. Position crank, cam sprockets as shown below.
3. Loosen timing belt tensioner bolt, move tensioner to remove any belt tension
and lock tensioner in place by tightening bolt.
4. Route timing belt around crank sprocket.
5. Route timing belt around cam sprockets, keeping belt taut on tensioner side.
6. Continue rotating engine using crankshaft bolt in clockwise direction two
revolutions making sure belt does not leave cam sprockets.
7. Stop rotating when the S mark on exhaust cam sprocket lines up with top
marking on cam cover. This procedure positions the cams in the best
unloaded valve spring position.
8. Holding belts and sprockets in position, unlock tensioner bolt allowing tension
to spring into position. Torque tensioner bolt to 27-38 ft/lbs (37-52 N.m).
9. Rotate engine clockwise two complete turns and verify matching marks on
cam and crank sprockets.
10. Check timing belt deflection, it should be within .300-.330/22 lbs (7.5-8.5
mm/98 N). If it is not, replace the tensioner spring and retest.
The AERA Technical Committee |
| CAM & CRANK TIMING MARKS FOR 1995-97 KIA 2.0L ENGINES |
Camshaft & Crankshaft Timing Marks On
1995-97 Kia 2.0L VIN 1 Engines
The AERA Technical Department offers the following information regarding camshaft and crankshaft timing for 1995-97 Kia 2.0L VIN 1 engines. The camshaft sprocket/pulley for this engine has four markings that may be considered for cam/crank timing. Only one of those markings is correct.
This cam sprocket Part # 0K97212425 has multiple markings to allow use in more than one engine. The correct marking for this engine is the #2 as shown in Figure 1 below.
If the sprocket was removed from the camshaft for correct installation note the 12? o?clock positioning of the cam dowel pin. To secure the sprocket on the cam, hold the cam in position with the use of a nut driver and tighten the lock bolt to 42 ft/lbs (56 Nm) as shown in Figures 2 & 3 below.
The crankshaft sprocket should be positioned as shown in Figure 4 below.
The AERA Technical Committee |
| VALVE CROSSHEAD CLEARANCE |
Valve Crosshead To Rocker Lever Clearance On
NH, NT & V-1710 Series Cummins Engines
Valve crosshead nose to rocker lever clearance on the subject engines must be checked during engine rebuild and at any time valve crossheads are replaced on engines using crossheads No. 123416 & 3000326. A minimum of .020 (.51 mm) clearance must be present as illustrated in Fig. 1, on the cylinder being checked with valves completely closed and crosshead in the upmost position. After installing rocker lever assemblies, check crosshead to rocker lever clearance as follows:
1. Turn crankshaft slowly in direction of rotation until the valves are closed on the cylinder being checked. With rocker lever held firmly against the stellite pad of the crosshead, a .020 (.51 mm) wire type feeler gauge must pass between the crosshead nose and the lower beam section of the rocker lever.
2. If the feeler gauge does not pass through:
a. Remove the rocker lever and/or crosshead and grind the nose of the crosshead or rocker lever beam in the area circled in Fig. 1 until enough clearance is obtained.
b. If the rocker is ground, grinding should cover the complete area illustrated in Fig. 2 in a continuous arc. Do NOT grind just the contact area.
Caution: A sharp depression in this area will cause a stress riser and eventual failure of the lever. Grind only enough material to achieve the required clearance. If grinding enters the oil passage, the rocker lever must be junked.
c. Grind sharp edges smooth.
The AERA Technical Committee |
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| CRANKSHAFTS INDUSTRIAL |
Crankshafts Used In Industrial Applications On
GM (Chevrolet) 5.7L (350 CID) Engines
When the GM (Chevrolet) 5.7L (350 CID) industrial engine is used in some applications such as lift trucks, the only crankshaft that is applicable has the forging number 1182. Dimension A of the rear flange is slightly smaller than that of other crankshafts used in General Motors 5.7L (350 CID) engines.
The larger flange crankshafts will not pass through the center hole of the bell housing. This is very critical when an oil clutch system is used.
The AERA Technical Committee |
| BURNED EXHAUST VALVES |
Burned Exhaust Valves, Low Power & Hard Starting On
Cummins NH & NT Engines With Jacobs Brake 25B & 30
Cummins Engine Co. reported that if the following complaints are experienced in the NH and NT engines equipped with Jacobs brakes, the slave piston clearance should be checked:
A. Exhaust valve burning
B. Low engine power when at operating temperature
C. Engine hard to start or will not start at operating temperature
A standard slave piston adjustment of .018 +/- .001 has been established. The .018 clearance setting is a cold setting which results in zero slave piston to crosshead clearance when the engine is at operating temperature.
Should the slave piston clearance setting be less than .018, the following conditions outlined in A, B or C above may result as well as affect breaking power.
If the slave piston clearance is greater than .018 +/- .001, the following problems may occur:
1. Engine injector train component problems
2. Injector carboning
3. Bent injector push rods
4. Worn injector adjusting screws
5. Decreased camshaft life
6. Cam follower and follower shaft failure
7. Delay in breaking action
If the above problems are experienced and the engine is equipped with a Jacobs brake, the slave piston clearance should be checked with the latest Cummins specifications.
The AERA Technical Committee |
| NEW CYLINDER LINER O-RINGS |
New Cylinder Liner O-Ring Seals On
Cummins NH/NT 6 Cylinder Engines
Cummins Engine Company has released new O-ring seals for the cylinder liners in NH/NT 6 cylinder engines. The new seals are made of an EP material and have a smaller diameter cross-section.
The new seal replaces both the old center seal #3008998 and the old lower seal #183049. The new seal carries Cummins part #3032874 and is black in color with one blue dot.
The new O-ring seals are not to be intermixed with the former seals on the same liner. Cylinder liner deformation will result. You can use the former seals and new seals in the same engine as long as they are used in the correct combinations on each liner. The illustration below shows the correct combinations.
The AERA Technical Committee |
| OIL IN COOLANT |
Oil in Cooling System on
VW 1.5L & 1.6L Diesel Engines
AERA members have reported instances of engine oil in the cooling system on VW 1.5L diesel engines. According to AERA sources, the problem is related to a crack in the cylinder head bolt hole located near the oil gallery feeding the cylinder head.
The oil feed gallery in the block is located on one side of the center head bolt hole and a coolant jacket is on the opposite side of the bolt hole. Pressurized engine oil is diverted through a slot in the head gasket and is feed up the side of the head bolt to the cylinder head. The oil also follows the bolt back down to the bottom of the bolt hole. Should the crack in the head bolt hole extend to the coolant jacket, oil can mix with engine coolant.
This problem is generally found on engines equipped with 11mm head bolt holes. Later design engines utilize 12mm head bolts and do not exhibit this defect. At the time of this writing no successful repair procedure is available.
The AERA Technical Committee |
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