Mirage L4-1597cc 1.6L DOHC (1990)
1.
Check camshaft journals and replace if damage or seizure is evident.
2.
Check camshaft lobes and replace if excessive wear or damage are evident. Measure camshaft lobe height. Minimum lobe height is as follows:
intake lobes; 1.3661 inches (34.700mm), exhaust lobes; 1.3546 inches (34.407mm). Replace camshaft if lobe height is below minimum value.
3.
Check rocker arms and replace if damage or seizure is evident.
4.
Install rocker arms.
5.
Apply engine oil to journals and lobes of camshafts, then install camshafts on cylinder head. Ensure camshafts are correctly installed. The
intake camshaft has a slit on the rear end for driving the crankshaft angle sensor. Also ensure dowel pins on sprocket ends are positioned
on the top.
6.
Install camshaft bearing caps. Bearing caps 2-5 are the same shape. Check identification marks on bearing caps to determine correct location, Fig.
14. ``L'' indicates intake camshaft side; ``R'' indicates exhaust camshaft side. No. 1 bearing caps are marked only ``L'' or ``R.'' Ensure rocker
arms are correctly mounted on lash adjusters and valve stem ends.
7.
Tighten camshaft bearing caps in sequence shown in Fig. 15, in two or three stages by tightening progressively. Torque to 14-15 ft. lbs. in the
final sequence.
8.
Install guide tool No. MD998307 or equivalent, on camshaft, then apply oil to camshaft oil seal and insert the oil seal along the guide tool until it
contacts cylinder head, Fig. 16. Using installer tool No. MD998306 or equivalent, press oil seal into cylinder head, then remove the tools.
9.
Install camshaft sprockets, tighten attaching bolts to specifications.
10.
Install crankshaft angle sensor as follows:
a. Position dowel pin on intake camshaft on the top.
b. Align punch mark on crankshaft angle sensor housing with notch in plate as shown in Fig. 17.
c. Install crankshaft angle sensor on cylinder head. Tighten attaching nut to specifications.
11.
Reverse remaining procedure to complete installation, noting the following:
a. Ensure camshaft and crankshaft timing marks are correctly aligned.
b. Tighten auto tensioner bolt to specifications.
c. Tighten timing cover bolts to specifications.
d. Tighten tensioner pulley bracket bolts to specifications.
e. Tighten crankshaft pulley bolts to specifications.
f.
Tighten water pump pulley bolts to specifications.
g. Tighten top engine mount bolts to specifications.
h. Tighten top engine mount bracket bolts to specifications.
i.
Tighten intake manifold support bolts to specifications.
j.
Tighten engine center cover and rocker cover bolts to specifications.
k. When installing rocker cover, apply 3M sealant No. 8660 or equivalent to semi-circular packing.
