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The composite upper intake manifold and cast aluminum lower intake from the L35 engine is also used on the LU3. The LG3 uses a cast aluminum upper intake and a cast iron lower intake. [7] The lower intake eliminated the EGR valve. The LU3 also received a "quiet cam" to help reduce vibration at both idle and high engine speeds.
The coil-in-cap HEI distributor was retired, and an all-new electronic distributor design was used. The intake manifold to head bolt pattern was redesigned to improve gasket integrity—four of the center intake manifold bolts were drilled at 72° instead of 90° for the cast iron cylinder heads. Changes to the valve covers were also made.
Chevrolet 153 Inline 4 (Chevy II, pre-Iron-Duke - includes the Vortec 3000/181 industrial/marine crate motor) Detroit Diesel V8 6.2L and 6.5L; Duramax V8; Generation III V8s with modifications. These modifications include an additional bolt hole at the top of the pattern, and attachment points for cast oil pans to lower bellhousing extensions ...
Other modifications include long runner intake manifolds, powder-forged connecting rods and the introduction of six-bolt main bearings (as opposed to four on the previous generations). Long runner intake manifolds in the LS series increases the airflow into the cylinders at low revolutions, increasing the torque. Truck applications of the LS ...
It still had an iron block, two-valve pushrod aluminum heads, and full sequential port fuel injection. The LG8 also featured a new intake manifold and numerous changes to improve parts-sharing with the larger-displacement LA1 3400. Emissions were improved with secondary air injection and it earned LEV status. The engine featured a 89 mm (3.5 in ...
The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines.These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line.
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