Visible Differences between LT1 and LT4 motors
Thread Starter
Melting Slicks
Joined: May 2001
Posts: 2,161
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From: Tyler TX
Visible Differences between LT1 and LT4 motors
Other than the obvious "Grand Sport" tag on the LT4 TB, what are the other visual differences between the LT1 and LT4 that make them easily identifiable?
Safety Car
Joined: Jun 1999
Posts: 3,570
Likes: 3
From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Re: Visible Differences between LT1 and LT4 motors (91-Z07Coupe)
Engine differences:
1. No EGR valve at rear of intake manifold
2. Red intake manifold.
3. Remove oil filler and look inside. See roller rockers and "LT4" cast in head.
1. No EGR valve at rear of intake manifold
2. Red intake manifold.
3. Remove oil filler and look inside. See roller rockers and "LT4" cast in head.
Burning Brakes
Joined: Nov 2000
Posts: 864
Likes: 0
From: Kelowna BC
Re: Visible Differences between LT1 and LT4 motors (91-Z07Coupe)
Other than the obvious "Grand Sport" tag on the LT4 TB, what are the other visual differences between the LT1 and LT4 that make them easily identifiable?
Melting Slicks
Joined: Apr 2000
Posts: 3,198
Likes: 2
From: Northern CA
Re: Visible Differences between LT1 and LT4 motors (92BAV)
Actually, the LT4 fuel rail cover letters aren't raised, they are sunken like the LT1s...only difference is the sunken letters are red.
Burning Brakes
Joined: Nov 2000
Posts: 864
Likes: 0
From: Kelowna BC
Re: Visible Differences between LT1 and LT4 motors (JasonL)
Actually, the LT4 fuel rail cover letters aren't raised, they are sunken like the LT1s...only difference is the sunken letters are red.
-Sheppe
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