Throttle body size

nshimmy · Post by **nshimmy** » Tue Mar 14, 2023 2:20 pm

Hello, I was wondering if different 1zz engines had different throttle body sizes? Background: I am rebuilding an engine to put in my running 2003 base vibe that has 299,999+ miles on it and the engine that I am working on has the throttle body in the pics below (the 55.58 mm is the approx size of the butterfly valve). The guy that I got the engine from seemed to think that it was a different size, but he didn't know for sure. Would there be any problems in running this throttle body?

SeattleJeremy · Post by **SeattleJeremy** » Tue Mar 14, 2023 3:02 pm

Does the TB have all the same hookups as your current TB?
I ask because there are two 1ZZ TB's one with throttle by cable (older style) and throttle by wire (newer style). Maybe they changed the size of the TB when they changed the throttle style.

nshimmy · Post by **nshimmy** » Tue Mar 14, 2023 3:40 pm

It does have all the same hookups. Cable as well

SeattleJeremy · Post by **SeattleJeremy** » Wed Mar 15, 2023 2:13 pm

Hmm, Do you know what year the engine was manufactured?

On this Corolla thread they mention the 98-02 Corolla's had similar 1NZ-FE engines with "56mm" TB's
https://www.clubxb.com/threads/diy-1zz- ... wap.28510/

These engines are a little different.

Throttle body size

Throttle body size

Re: Throttle body size

Re: Throttle body size

Re: Throttle body size