Engine Diagnostics
Note: The following diagnostics pertain to the 2.2L engine only.
•
Valve train noise (clacking sound). Operate the engine for approximately
one hour before diagnosing HLAs as the problem. Do not rev the engine!
•
If the rocker shaft relief valves are plugged, the rocker shaft oil pressure will
increase during low engine temperature operation. This could result in the
HLAs being forced part way out of the rocker arm sockets. A clacking
sound may be produced which is similar to collapsed HLAs. Engine misfire
may also occur during this condition.
If the relief valves will not hold pressure, the HLAs may collapse, again
producing a clacking sound.
2.2L Engine Disassembly
Note: Refer to the service manual for the detailed step-by-step disassembly
sequence. The following information addresses special steps only.
The 1800cc engine stands 499817000 can be used with adapter RH 498457000
and adapter LH 498457100 to support the 2.2L engine. Remove the engine
accessories: i.e. drive belts, alternator, air conditioning compressor, and brackets.
Timing Belt Removal
Use crankshaft pulley wrench 499977000 to remove the crankshaft pulley bolt,
then remove the pulley.
Use the crankshaft pulley to rotate the crankshaft to align the belt timing marks.
Note: There are two timing marks on both the cam pulleys and the crankshaft pulley,
a notch and an arrow. Align the notch on the outer rim of each camshaft pulley with
the notch on the inner cam cases. Align the notch on the rear flange of the crankshaft
sprocket with the notch on the oil pump housing.
Mark the belt at the three timing notches. This will make reinstallation much
easier and also insures proper placement of the belt between the left and right
cam pulleys.
Mark the belt rotation direction, The belt must be reinstalled to rotate in the
same direction.
Note: New belts will have the timing marks printed on the belt as well as
arrows indicating direction of rotation.
First, loosen the cam belt tensioner mounting bolts.
Note: Do not remove the bolts.
Remove the idler pulleys in this sequence: lower right (1-3 side), then the lower
left (2-4 side, next to the water pump). Then remove the cam belt.
Finally, remove the cam belt tensioner pulley, tensioner assembly, and crank-
shaft sprocket.
Remove the left and right camshaft sprockets using cam wrench 499207100
or 49940700
.
Notice the locating pin on back of the sprockets for reinstallation. Also locate
the reluctors on the back of the left camshaft sprocket. These are the cam angle
sensor reference triggers.
Note: The left camshaft sprocket must not be installed on the right camshaft, as dam-
age to the inner right cam belt cover may occur. A no start condition also will result.
Remove the mounting bolts and carefully remove the tensioner bracket to avoid
damage to the friction-fit dust seals.
Remove the left and right inner cam belt covers. Note the location of the
friction-fit dust seals.
Removing Crank Pulley
Marking Timing Belt
Removing Idler Pulleys
Camshaft Sprocket
Inner Cam Belt Covers
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