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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Rear heater hose routing

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Old Aug 13, 2025 | 06:12 PM
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Grizzlysnacks's Avatar
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Rear heater hose routing

Hey all,
i am about to replace my heater core soon.
i got this truck with the coolant system somewhat jimmy rigged as the heater core was leaking.
I have wrapped my head around the routing for the fire wall heater hoses.
But i am a bit confused how to incorporate the rear heater core lines into the mix.
Truck is a 1990 2nd gen 4runner.

Any help or diagrams would be greatly appreciated. Ive been having a hard time finding anything useful online.

Thanks.
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Old Aug 13, 2025 | 09:10 PM
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First question to be answered is>>> Does your truck have a rear heater in the center console??
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Old Aug 14, 2025 | 05:16 AM
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Originally Posted by millball
First question to be answered is>>> Does your truck have a rear heater in the center console??
Yes. Small blower/heater core in console.
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Old Aug 16, 2025 | 05:49 PM
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Anyone?
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Old Aug 16, 2025 | 08:32 PM
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Been busy.
I'll try to post some pics tomorrow.
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Old Aug 17, 2025 | 10:49 AM
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Thanks! Appreciate it.
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Old Aug 17, 2025 | 03:25 PM
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Here's some pics of the hoses on my 1995 'Runner





Last edited by millball; Aug 17, 2025 at 03:26 PM.
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Old Aug 17, 2025 | 04:25 PM
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Thats great, thank you.
My 22re should be essentially the same layout i would think.
Looks like ill have to get some T fittings to splice in.

Thanks again!
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