Cylinder Block - Chrysler Conquest 1988 Service Manual

9-2
ENGINE
- General Information
GENERAL INFORMATION
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The 2.61 (159 cum.) displacement engine is a four cylrnder overhead camshatt power plant with a cast Iron .-=
cylinder block, an aluminum cylinder head and a silent shaft_ system.
The forged steel crankshaft is supported by five main bearings. 1
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The cylinder block has a Siamese type water jacket which ensures high cooling efficiency and uniform cooling -1
of the cylinders.
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Two counterbalance shafts (silent shafts) are incorporated in the cylinder block to reduce engine noise and ~~
vibration.
The prstons are made of alumrnum alloy casting.
The piston pin IS floatrng In the piston and pressed-in to the forged steel connecting rod. The piston pink is !
offset from the prston center toward the thrust side.
The oil pump is a gear type pump and also drives the right (front[silent shaft.Lhe oil pump and left (rear) silent
shaft are chain driven through sprockets by crankshaft. -
The silent shaft-system cancels the vertical vibration force of the engrne and-secondary vibrating forces such -1
as the vibrating moment in the rolling direction. The silent shafts are located~ in the upper teft (rearward side)
and lower right (forward side) of the cylinder block. The left shaft. rotates in 'the same direction as the
crankshaft while the rrght shaft rotates in the opposite direction at twice the crankshaft speed. E$h silent Yti
shaft is supported by two aluminum bearings.
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The cylinder head is an aluminum alloy casting with compact type comb@stion. chambers. The intake and 1
exhaust valves are made of heat-resistant steel and arranged in a 'Iv" with asamshaft on center. The let valve
assemblies, consrsting of the let valve, jet body, stem seal, spring, retainer GYd retainer lock, are screwed into ~5
the cylinder head.
The cast iron camshaft is supported by five bearing journals and is driverrby the crankshaft sprocket and .I
camshaft spracket by the trmrng charn. The distributor drive gear is mounted on the front of the camshaft. -I=
The camshaft drive chain
IS
a double roller type chain. To provide the chain vvi_th the proper tension and ensure '
quiet operation at all times, tensloner is installed on the slack side, :
Two rocker arms are used with one for actuating the exhaust-valves and the other For actuating the intake y
valves and jet valves.
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The rocker arms are aluminum alloy die-castings with cemented carbide alloy slippers. By using the auto lash
adjuster, the rocker arms eliminate the need for adjustment of intake 2nd exhaust valve clearance.
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The oil pump IS an internal-external involute gear type pump and is driven cy crankshaft. The oil filter, paper f
filter element cartridge type, is mounted on the front facing side of the engine.
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