LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

intake steam bypass

Old Jun 27, 2006 | 12:23 PM
  #1  
str8-6's Avatar
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Posts: 46
From: tally, florida
intake steam bypass

i was reading that the 96 lt's ( and other years) have a throttle body steam port that heats up the tb by using the coolant steam. living in florida i was wondering how you can bypass it since its never needed. has anyone done this yet and how hard is it. also what all do i need in order to get this done.
Old Jun 27, 2006 | 12:55 PM
  #2  
BUBBA's Avatar
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From: PORTLAND, OR, MULTNOMAH
Re: intake steam bypass

Everyone does it.
Although there are many sites for this, I will give you the basics:

"cut" the 90 degree elbow off (because it's a bit...to get off) from the pass side of the TB where it connects the metal tube leading from the rear of the heads.
Remove the rubber hose connected to the TB on the Driver's side and reconnect it to the metal tube on the pass side (if the hose is not long enough, just get another piece of hose and splice it in) Should probably secure the hose to the metal tube with a screw clamp. So now you have completed the bypass and the steam will go directly to the radiator for recirulation. To finish the job, get a couple of 3/8" vacuum caps from the hardware or auto shop and slap them on the TB where you removed the 90 degree hose and outlet on the driver's side of the TB (just to keep crap out and dress it up.JMHO
Old Jun 27, 2006 | 12:58 PM
  #3  
yotaman96's Avatar
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From: Portland, TN
Re: intake steam bypass

Check this link out.
http://shbox.com/1/tb_bypass.jpg
Old Jun 27, 2006 | 02:07 PM
  #4  
Injuneer's Avatar
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From: Hell was full so they sent me to NJ
Re: intake steam bypass

And while the tube from the back of the heads that connects to the throttle body (95-97 models only - in 93/94 its routed directly to the radiator) is called the "steam tube", it does not normally contain "steam"..... its simply the coolant return from the rear of the heads, which is there to allow air and vapor bubbles to escape IF they form there.
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