Originally Posted by ChadGresham
My truck is a 1986 Chevy c10 pickup, with carbureted 4.3liter, or LB1 from the factory. On the glove box info sticker it says Vortec 4.3 liter V6. I know Chevy didn't start marketing their heads under the Vortec name until like 96 but can someone tell me why Chevy named my truck motor Vortec??
Chevy used the term Vortec well before the 1996, L31, 350. It's basically an advertising term not a technical one.
We hot rodders are probably to blame for the thought that the L31 and the word Vortec are the same. Where Chevy reused the word Vortec with the L31, we have conflated the term to be only the L31 head, which isn't true.
So when you go shopping for Vortec parts, you need to know for sure what you're looking at. Kind of like they reused the popular and powerful LT-1 name from the late 1960's early 1970's Z28 Camaro engine with the fuel injected, reverse cooled LT1 of the early 1990's. Very few parts between these two small blocks are common yet the name from the advertising staff is almost indistinguishable.