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Tahoe Suburban Throttle Body Bypass Mod
Dusty
post Feb 15 2006, 03:25 AM
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The coolant system is not completely devoid of air. However, if you get large air bubbles in certain points it can block the flow of coolant. If the coolant is cold when you do the TB bypass, you should get minimal leakage of coolant since you are at one of the highest points of the system and there isn't much pressure in the lines. A small amount of fluid loss won't hurt anything. The little air that you let in will eventually make its way to the radiator cap and the reservoir tank. Make sure you're not leaking and make sure you're topped off and you should be fine.

Now, if I were to drain the coolant system for a cam install or something, I would want to bleed the system very well after filling it back up because throughout the engine and coolant lines there are many places where the coolant has been displaced by air pockets. In this case it is important to pressurize the coolant lines and bleed the air off.
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2kburb
post May 11 2006, 09:33 PM
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Great info and instructions.
Finaly finished this yesterday:helps to have the right tools (like 4" pliers for the left side) and then the patience to work that pesky left side hose off when it's stuck on.
Works like a charm and really think it runs cooler by a few degreess (still have the stock air system)
Thanks! notworthy.gif
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TexasZ71Tahoe
post Jul 13 2006, 12:30 PM
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okay did this this morning, and WOW, what a cheap mod and easy to do, but i did also notice about a 5-10 deg drop in temp, why is this, does this make that big of a deal?


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jmbaker
post Jul 13 2006, 12:38 PM
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W/O spending time looking to see if this has already been answered... How would this affect things if you spend time in sub-freezing weather?

Reason I ask is that I spend a week or two-a-year in weather that approaches ZERO at night. I don't want to have to remember to un-mod (if nec.) before going to Mom's in the winter. wink.gif


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sinistar
post Jul 13 2006, 01:02 PM
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It's been said that it may only pose a problem in extreme below-zero conditions.


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jmbaker
post Jul 13 2006, 01:03 PM
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QUOTE (sinistar @ Jul 13 2006, 12:02 PM)
It's been said that it may only pose a problem in extreme below-zero conditions.

OK, thanks brudda! smile.gif


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ZTEX
post Jan 23 2010, 10:57 PM
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Could you just plug off at all four points?


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Scott
post Jan 24 2010, 09:20 AM
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Pretty old thread, but I've been running this for years through the coldest of Chicago weather and it's never caused a problem.


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kd_unruh
post Jul 5 2010, 05:07 PM
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Did this mod yesterday. Easy to do, except the hose on the alternator side, that was a PITA. I noticed a difference, but I also installed e-fans and opened up my factory air box. The old Hoe runs like a champ again!!!
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austia001
post Aug 30 2010, 11:47 AM
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Old thread but I am about to do this today.. just got the tools to do it.. I have a body lift on the truck so everything is kinda set down a little but it looks like a pain in the butt to get to those clamps.. Gotta get a shorter pair of pliers i guess lol
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gatorz71
post Sep 1 2010, 07:00 PM
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QUOTE (austia001 @ Aug 30 2010, 12:47 PM) *
Old thread but I am about to do this today.. just got the tools to do it.. I have a body lift on the truck so everything is kinda set down a little but it looks like a pain in the butt to get to those clamps.. Gotta get a shorter pair of pliers i guess lol

I bought the 9/16" parts and tried to do this mod last night on an 04' hoe. well...... on the 04' model the hose going to the throttle body are 1/4"!!!! Got it done though have drove the hoe yet (its the ole ladys hoe). Gunna drive it later
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Slvr Z71
post Sep 13 2011, 04:16 PM
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Gonna get the parts this week and do this Sunday weather permitting. Hope it goes easy !!
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Slvr Z71
post Sep 20 2011, 08:04 AM
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Sunday rain monday work, tuesday called in and did it in 10 minutes! Have to take the son to preschool and see if Inotice a diff!
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mondo05
post Sep 20 2011, 09:08 AM
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QUOTE (Slvr Z71 @ Sep 20 2011, 10:04 AM) *
Sunday rain monday work, tuesday called in and did it in 10 minutes! Have to take the son to preschool and see if Inotice a diff!


Anything noticeable?


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Scott
post Sep 20 2011, 09:13 AM
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Don't expect any SOTP improvement with this one. if you're lucky, you might get a couple of HP, which is very far below what the Butt-O-Meter can notice.


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Slvr Z71
post Sep 20 2011, 09:16 AM
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Cool I am just happy it was 10 min thats great!
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carlos75
post Aug 11 2013, 08:24 AM
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took me an hour. dang spring clamps. i got two of the old fashion adjustment hose clamps, i couldnt find any spring clamps at oriellys but the adjustable ones worked fine. i guess it may be placebo effect but i think she drives better! cooler 5 or ten degrees on mine too. once the spring clamps and hoses come off, its a snap. 4 inch pliers was all i could get in there.
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