Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

H3 V8 swap

Old Mar 4, 2021 | 03:14 AM
  #1  
Blackhummerh3v8's Avatar
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Default H3 V8 swap

Hi all i finally have the LS 6.0 engine mounted and bolted to the transmission... a few questions for those who have done the same... The 3.7 original engine ran a fuel in and return line to the tank... do i simply remove the return line and block it of...also will i then have to install a pressure regulator or is this already built into the LS engine...
 
Old Mar 4, 2021 | 10:17 AM
  #2  
bronxteck's Avatar
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From: BX NY North East
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depends on what engine intake / fuel rail combo you used and what year.
my 2003 H2 has a pressure regulator on the fuel rail drivers side front.
 
Old Mar 4, 2021 | 05:51 PM
  #3  
wpage's Avatar
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Best do some searching.

What you are doing is not common.
 
Old Mar 4, 2021 | 06:43 PM
  #4  
hummerz's Avatar
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Originally Posted by Blackhummerh3v8
Hi all i finally have the LS 6.0 engine mounted and bolted to the transmission... a few questions for those who have done the same... The 3.7 original engine ran a fuel in and return line to the tank... do i simply remove the return line and block it of...also will i then have to install a pressure regulator or is this already built into the LS engine...
Where is the return line?
 
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