![Engine cross section](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/a74b19ba-f9f1-4a87-832c-de9072922029_rw_1200.jpg?h=5ee14146cf422e7db62e1a4ffa94821a)
Engine cross section
![1930, Cadillac engine cross section](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/45f1111a-c868-43dd-8834-f7c565138bb8_rw_1200.jpg?h=c67aca7a4eac09feea146df1a93ecaf1)
1930, Cadillac engine cross section
![BMW 5 bearing engine cross section.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/812e5dd8-095b-4afd-b1a2-e199d6b51e32_rw_1920.jpg?h=c0c20639fc8d99724d06c0279afbe491)
BMW 5 bearing engine cross section.
![BMW 5 bearing crankshaft compared to 3 bearing crankshaft.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/7b9a0c2a-37f8-4908-b056-8091309b8f64_rw_1920.jpg?h=ea80a3b7172e8f83a37e5c2894d608fe)
BMW 5 bearing crankshaft compared to 3 bearing crankshaft.
![Boxter engine sequence cross section.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/d2517f92-df28-41c7-ae0f-dbfee3151287_rw_1200.jpg?h=8b75831f8161d3f0e89d3ef1d63eb83e)
Boxter engine sequence cross section.
![DOHC cross section engine illustration.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/7185bbb2-6341-4a21-abad-67a1bd9e8d6a_rw_1200.jpg?h=32b6eb7b5f88ee8d9a2f066198fb6e9d)
DOHC cross section engine illustration.
![Flathead engine cross section.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/9032fc87-c455-49da-ac0a-6fa3192ee223_rw_1200.jpg?h=a956dc2b91084de2d195957c8047d9d9)
Flathead engine cross section.
![Hemi versus flathead cross section engine illustrations.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/5716f50c-d37f-4927-be0b-80568f26919c_rw_1920.jpg?h=38632b06a6b996327f2340722d955a70)
Hemi versus flathead cross section engine illustrations.
![Hemispherical versus wedge engine displacement.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/119f1e4a-cdc5-492f-bde4-1f147de4fc27_rw_1200.jpg?h=3915abbf102bd779b80abe84c25a9163)
Hemispherical versus wedge engine displacement.
![Hemi cross section engine illustration.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/f5107d32-60da-4c0d-89fa-121d7ab031b2_rw_1920.jpg?h=3b59c815fa924340c5dff88cb3d82ea0)
Hemi cross section engine illustration.
![Hemi cross section engine illustration.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/890deb01-d867-427a-9f4a-344c40e3d1b4_rw_1920.jpg?h=07f762e86183833b9897fef7aacd0e32)
Hemi cross section engine illustration.
![Small block Chevrolet, cross section engine illustration.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/25663006-e522-40b3-bb3d-cfdd7f385dc9_rw_1200.jpg?h=ec109805949cf52020349d824b97c88f)
Small block Chevrolet, cross section engine illustration.
![Double overhead head camshaft, DOHC cross section engine illustration.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/f036dab8-8b6c-47dc-a46d-a24befab5526_rw_1200.jpg?h=5ccd76bd0ef1744e0c6d0ca042081956)
Double overhead head camshaft, DOHC cross section engine illustration.
![Chevy vega piston skirt layers.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/3c740926-bff7-4a33-a6cc-63eda7982ded_rw_1200.jpg?h=6f6254e1c4ec5294a445e5a591d3a40b)
Chevy vega piston skirt layers.
![Chevrolet Vega silicone impregnated piston walls.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/4d4067cf-09ea-46a2-ba3d-0b1e639b163c_rw_1920.jpg?h=d8b9705d49f0f764d7d1bb47e19ce9b1)
Chevrolet Vega silicone impregnated piston walls.
![VTEC actuation sequence.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/0df745d5-08f2-40cc-94ae-bbfd7039fb21_rw_1920.jpg?h=631d32040b3d3e0d9a966fbd2ed7d365)
VTEC actuation sequence.
![Rotary engine firing sequence, cross section illustrations.](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/b282c542-b8da-4069-9d09-d9c8569c1b91_rw_1920.jpg?h=fca5a82502a7e099f13ecddf7c1b8bdd)
Rotary engine firing sequence, cross section illustrations.
![Single Overhead cam cross section engine illustration](https://cdn.myportfolio.com/f970bec91caea68a8c20114d1613dd40/87a2ffd5-7c56-41be-bf60-bc231e9a885d_rw_1200.jpeg?h=cb4c1f0b28a4c677afeba46c074dfe8c)
Single Overhead cam cross section engine illustration