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2. General Motors Vortec engine - Wikipedia

   en.wikipedia.org/wiki/General_Motors_Vortec_engine

   Vortec is a trademarked name for a line of gasoline engines for General Motors trucks. The name first appeared in an advertisement for the 1985 model year 4.3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber , creating a better air / fuel atomization. [ 1 ]

3. Chevrolet 90° V6 engine - Wikipedia

   en.wikipedia.org/wiki/Chevrolet_90°_V6_engine

   The LB1 used in trucks and vans was referred to as Vortec in Chevrolet literature (named after a combustion chamber design known as a swirl port which twists the fuel mix from the intake ports as introduced with the Cavalier's 2.0L engine), and this name continued to be used with all truck and van 4.3 L (262 cu in) V6s until 2014.

4. Chevrolet small-block engine (first- and second-generation)

   en.wikipedia.org/wiki/Chevrolet_small-block...

   This block is one of three displacements that underwent a major change in 1968 when the main journal size was increased from 2.3 to 2.45 in (58.4 to 62.2 mm). In 1965, Chevrolet released the now-legendary L-79 , which was nothing more than an L-76 (11.0:1 forged pop-up pistons, forged steel rods and crank, 2.02 Corvette heads), but with the 30 ...

5. List of GM bellhousing patterns - Wikipedia

   en.wikipedia.org/wiki/List_of_GM_bellhousing...

   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 ...

6. Chevrolet big-block engine - Wikipedia

   en.wikipedia.org/wiki/Chevrolet_big-block_engine

   The firing order of older big-block engines is 1-8-4-3-6-5-7-2 [62] while Vortec 8100's firing order is 1-8-7-2-6-5-4-3. Other upgrades of Vortec 8100 include a new 18-bolt head bolt pattern, longer connecting rods, different symmetrical intake ports, different oil pan rails, and the use of metric threads throughout the engine.

7. Talk:General Motors Vortec engine - Wikipedia

   en.wikipedia.org/wiki/Talk:General_Motors_Vortec...

   i just bought a 1999 cmc pickup it has the 4.8 vortec i am getting antifreeze in the oil took the valve covers off one head looks like new the other one has alot of sluge i heard the gm used two comp. for the heads they had problems with one of them cracking i was woundering if anyone has any info about this and what to look for thanks ...