Oil P A N - Chevrolet 1980 Light Duty Truck Service Manual

Fig. 6A4-36~R em oving C am shaft Bearings
not be in the way while replacing camshaft bearings.
1. With camshaft and crankshaft removed, drive
camshaft rear plug from cylinder block.
2. Using Tool J-6098, with nut and thrust washer
installed to end of threads, index pilot in camshaft front
bearing and install puller screw through pilot.
3. Install remover and installer tool with shoulder
toward bearing, making sure a sufficient amount of threads
are engaged.
4. Using two wrenches, hold puller screw while
turning nut. When bearing has been pulled from bore,
remove remover and installer tool and bearing from puller
screw (fig. 6A4-36).
5. Remove remaining bearings (except front and rear)
in the same manner. It will be necessary to index pilot in
camshaft rear bearing to remove the rear intermediate
bearing.
6. Assemble remover and installer tool on driver
handle and remove camshaft front and rear bearings by
driving towards center of cylinder block (fig. 6A4-37).
Installation
The camshaft front and rear bearings should be
installed first. These bearings will act as guides for the pilot
and center the remaining bearings being pulled into place.
1. Assemble remover and installer tool on driver
handle and install camshaft front and rear bearings by
driving towards center of cylinder block (fig. 6A4-37).
2. Using Tool Set J-6098, with nut then thrust washer
installed to end of threads, index pilot in camshaft front
bearing and install puller screw through pilot.
3. Index camshaft bearing in bore (with oil hole
aligned as outlined below), then install remover and installer
tool on puller screw with shoulder toward bearing.
• Number one cam bearing oil hole must be positioned
so that oil holes are equidistant from 6 o'clock position.
• Number two through number four bearing oil holes
must be positioned at 5 o'clock position (toward left side
of engine, and at a position even with bottom of cylinder
bore).
Fig. 6A4-37--Replacing Camshaft Front Bearing
• Number five bearing oil hole must be in 12 o'clock
position.
4. Using two wrenches, hold puller screw while
turning nut. After bearing has been pulled into bore, remove
the remover and installer tool from puller screw, and check
alignment of oil hole in camshaft bearing.
5. Install remaining bearings in the same manner. It
will be necessary to index pilot in the camshaft rear bearing
to install the rear intermediate bearing.
6. Coat new camshaft rear plug O.D. with # 1 0 5 2 0 8 0
sealant, or equivalent, and install flush to 1/32" (.80mm)
deep.
OIL PAN
Removal
1. Drain engine oil.
2. Remove exhaust crossover pipe.
3. On vehicles equipped with automatic transmission,
remove converter housing under pan.
4. On 'K ' models with automatic transmission, remove
strut rods at motor mounts.
5. Remove oil pan and discard gaskets and seals.
Installation
1. Thoroughly clean all gasket and seal surfaces on oil
pan, cylinder block, crankcase front cover and rear main
bearing cap.
2. Install new oil pan side gaskets on cylinder block
using gasket sealant as a retainer. Install new oil pan rear
seal in rear main bearing cap groove, with ends butting side
gaskets. Install new oil pan front seal in groove in crankcase
front cover with ends butting side gaskets.
3. Install oil pan and torque bolts to specifications.
4. If 'K' model, replace strut rods.
5. Install converter housing under pan.
6. Install exhaust crossover pipe.
7. Fill with oil, start engine and check for leaks.
SM ALL BLOCK 6A4-21
LIG H T T R U C K S ER V ICE MANUAL