C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

TB Bypass on a '90 vert

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Old Jun 22, 2007 | 02:38 PM
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jghmczo6's Avatar
jghmczo6
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From: Phoenix Arizona
Default TB Bypass on a '90 vert

Quote:
Originally Posted by steven mack
I always thought heater cores had two lines one in one out . Thats why you need the loop in a vette.

You are absolutely correct. I was only showing how they "tapped" into the upper radiator hose and WP outlet hose to get collant flow through the throttle body. I just didn't show the second hose the heater core......Mybad...

Here's a modified pic with all the connections:

My understanding; I am NOT required to connect the two hoses together and the coolant will flow as intended without the bypass.
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Old Jun 22, 2007 | 03:45 PM
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jghmczo6
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From: Phoenix Arizona
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I know this topic has been beat to death, however I want to make sure I am doing this correct. Living in Arizona outside temp today is 108* with pavement at 150*-160*, and it is a daily driver. Also does anyone know the direction of the coolant flowthrough the TB, is it from the driver side to the passenger side or vise versa? The attached diagram I retrieved from a searched post, according to the diagram I would eliminate a factory bypass without altering the flow if coolant if the posts read are correct.

Thanks in advance for the help
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Old Jun 22, 2007 | 04:19 PM
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From: One day you're a Comet...the next day you're dust... Arkansas
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I have a 1989. Here's the way I did it. Pull off the hose between the firewall connector and the passenger side of the throttle body after draining 3 quarts of coolant. Remove the short hose between the throttle body and front of the engine. Take a new piece of 5/8" hose about 50" long and run it from the firewall connector to the front of the engine. Route the new hose under the compressor lines. Use a big tie wrap or two to support the new hose and new clamps. That's it.
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