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

How to clean ventilation system on 84-88 trucks

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Old 02-16-2016 | 12:39 PM
  #21  
RAD4Runner's Avatar
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Originally Posted by arlindsay1992
I may be able to help here........
Hope this helps. It's a lot easier to just pull the evap box as shown above but if you don't want to have to drain, vacuum, and recharge the whole system, it is possible.
Awesome! Thanks, Arlindsay. Like you how-to videos, it absolutely helps.
The problem with low volume air-flow is it causes the evaporator to freeze up if AC is very strong and causes even low or no flow, so I really wanna do this.

Originally Posted by dropzone
So Napalm is out?
...
Yup. I use M.E.K. - LOL! I once found a quart can of MEK in a storage locker on our ship and people reacted like we'd have to decontaminate the whole place - LOL!

Last edited by RAD4Runner; 02-16-2016 at 12:42 PM.
Old 12-03-2016 | 06:49 AM
  #22  
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From: Northern AZ
Great writ up Terry. Now I'm thinkin I may just tackle my A/C system too.
Old 12-03-2016 | 08:09 AM
  #23  
ewong's Avatar
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From: Philly PA
Having just done this recently

(yeah - I SHOULD have replaced the blower box when I had the EVAP box out, but at the time I didnt know I HAD a spare blower box)

yes - you can take the blower box OUT without taking the EVAP box out.
It helps to PEEL BACK the carpet. That extra 1/8 inch of clearance is crucial to getting the box in/out

If a recall, a 1/4 drive 8mm flex socket head and some 1/4 drive extension bars to a "T" slider bar - are really helpful.

See some pics on this thread

https://www.yotatech.com/forums/f116...71/index2.html

If you have a mouse nest jammed agains the EVAP core, then build a mouse proof cage to the cowl intake.

Borrow or get a "see snake" (they've dropped in price since I got mine) and check to see how bad the eval box is.
At a minimium, use a shop vac toe clean it (if it needs it)
Old 06-07-2017 | 11:16 AM
  #24  
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So I was told I would have to remove the whole dash/gauge cluster etc. to replace my evap and expansion valve on my 1986 pickup. This shows otherwise. I just want to be sure that I can do it from underneath before I start ripping and tearing. It's a 37 year old system and I want to keep R12 but I want to replace ALL components to be sure this system lasts for years to come as R12 isn't cheap these days. Plus with my Weber conversion, I can't afford any more compressor load that 134A might put on the engine as I don't have an idle bump solenoid anymore.
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