LT1-LT4 Modifications 1993-97 Gen II Small Block V8

need help with lt1 water pump

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Old 04-24-2007, 11:10 PM
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Default need help with lt1 water pump

i had a coolant leak, let the car cool off.i noticed that the hose that goes in the pointed area of picture had a leak..can anyone help me as to what hose this is and what it connects to.thanks


Old 04-25-2007, 12:13 AM
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It's the heater "outlet" hose. Trace it to one of the two hoses coming out of the firewall right next to the HVAC "box".
Old 04-25-2007, 01:16 AM
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so when i call the auto parts store, i ask for a heater hose outlet? does anyone have a picture of the heater hose outlet? i see that it looks like a 3 piece part..hose that comes from firwall next to hvac connected to..aluminum connector connected to... another hose that connects to water pump (lower left side of pump, if youre looking at it from the front of the engine)
Old 04-25-2007, 06:36 AM
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You didn't specify what year your car is, but here're the heater hose diagrams for all years of F-bodies. If the part of the hose that's leaking is the one labeled "#12," then the part number for it is 10188037 .



Old 04-25-2007, 09:14 AM
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How bad is it leaking? Just cut a couple of inches off of it and put a good clamp on it..
Old 04-25-2007, 09:32 AM
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Default same prob kinda

can I order just the valve number 13 and how does it connect to those to lines because it looks like it is pressure crimpt on there...... OR can I just put a straight connector there and just connect them together without the valve?
Old 04-25-2007, 09:58 AM
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Originally Posted by Sxyman815
can I order just the valve number 13 and how does it connect to those to lines because it looks like it is pressure crimpt on there...... OR can I just put a straight connector there and just connect them together without the valve?
It's just a restrictor, to slow down the flow of coolant and reduce the noise of the water flow through the heater core.

Feel free to remove it, and just splice the two ends together with a barb and clamps. You'll never know it was gone.
Old 04-25-2007, 11:20 AM
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THANKS..my car is a 97..ill need #13 and #12..should i cut off the aluminum looking cripmt thing..and just use 2 clamps..one on each side of the of #13?will that work just fine? thanks
Old 04-25-2007, 11:26 AM
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Originally Posted by HIZPANICGUY21
THANKS..my car is a 97..ill need #13 and #12..should i cut off the aluminum looking cripmt thing..and just use 2 clamps..one on each side of the of #13?will that work just fine? thanks
You'll need some type've barb coupling to join the two hoses together, but yes, that'll work. If you're good with a Dremel or a die grinder, you can cut through the aluminum flow restrictor and then carefully slice the crimped parts longways and just peel the crimps off, keeping the full length of the hose intact.
Old 04-25-2007, 12:12 PM
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#13 will work as a coupling right? hose + #13 + hose right? with the 2 clamps, one on each side of #13?
Old 04-25-2007, 01:55 PM
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Originally Posted by HIZPANICGUY21
#13 will work as a coupling right? hose + #13 + hose right? with the 2 clamps, one on each side of #13?

Obviously it'll work as a coupling, , I just can't guarantee whether it'll work with worm clamps. Why don't you try it and tell us what you find out?



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