1994 Chevy S-10 type of motor

Tiny
TOOLGUYSK
  • MEMBER
  • 1994 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 207,056 MILES
What is the diffrence beween a 4.3 z motor and a w motor and what does z and w mean
Saturday, October 25th, 2008 AT 10:55 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Z- is a throttle body injection engine. W- is a CPI injection. The early W's (aluminum top intake manifold) can be swapped with the late Z's. If the W engine has a plastic top intake it is not interchangeable. The late Z and early W had balance shafts and a few other minor changes to them (heads) to get more power and efficiency and to vibrate less.
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Sunday, October 26th, 2008 AT 8:45 AM

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