TriniLex

This was done on a 1991 LS400

I will add more pictures soon this is just the main ones I took.

First disconect the battery cable

Remove 3 plastic screws for under carage plastic (Right above your feet)
"Picture coming soon"

Remove inside of glove box. There are 3 clips on the bottom and 2 on the top. Remove with a Flat head screwdriver. After removing interior of glove box you will see the other 2 bolts holding the bottom panel. Also unplug all the wires going to the ECU that is attatched to the bottom panel.

ECU found on bottom panel


Remove foot vent (left)
"Picture coming soon"

Remove right vent duct
"Picture coming soon"


Remove 2nd computer (I think its the traction control unit)





Now find all the Gold nuts that are holding the blower and evaporator to the fire wall. 10mm bolt. (The blower is attatched to the evaporator)


Remove this bolt it will save you time later. It found between the evaporator housing and the blower. It holds on this black box.



Unplug this wire harness. You can get to it thru the glove box


Also remove these 3 screws on top of the Blower it makes easier to slide out


Remove the 2 freon lines on the firewall (engine bay side)
"Picture coming soon"

Remove the thin metal wire (from Expansion valve) that goes to a bolt under the throttle body. (engine bay)

"Picture coming soon"

Back inside if you have pulled all the wire harnesses apart and unscrewed all the bolts you should be able to pull right out. This wire harness was hidden behind the unit.



Full assembly view
"Picture Coming Soon

Remove these gold screws holding the 2 halves together

TriniLex

Top half with the evaporator. Also its a good idea to change the expansion valve (circled in red) Cost $63 at Advance auto parts

TriniLex

Empty Glove box area


Empty area

LiCelsior

iTrader: (32)

nice write up +1

TriniLex

Thanks I have more pics to take when I put it back on. Dryer, Evaporator, Expansion Valve all for $175 Shipped. If anyone is intrested PM me.
Thanks

jeffls400

Great write-up and awesome pics. Will definitely come in handy!

TriniLex

I got the new parts in the mail today.


First Remove the lines and the Expansion valve from the old Evaporator.


I found it easy to remove the Expansion valve with a vice grip. The lines are easy to bend.


Then I cut the insulation the remove the sensor for the Expansion vavle that was snug against the piping.


Here are the two expansion valves side by side. Notice the new one has a longer end, but I guess that is ok.


Here is the Expansion valve installed ont he lines


Here is the sensor installed back into the insualation. (which I taped back with electrical tape.


Here are the lines and expansion valve installed on the new evaporator.


Total Time: 30 mins (Didn't have the right wrench)
Expansion Valve $50
Evaporator $150 )

If anyone is intrestes I am selling these parts.
Expansion Valve, Evaporator and Dryer for $175 shipped.
As you know the Evporator itself is 175-250 at your local parts shop.
Good luck

TriniLex

So I was putting it all together today. I took some better step by step pics if anyone is intrested. I came across a problem however.
I don't remember where this came from?
Does anyone have any idea?


Thanks

LILEVO

iTrader: (1)

Haha. I just tore mine apart today. I'm sure you figured it out by now, but that goes inside the evaporator fins

dulobast25

Nice writeup, however I wanted to aska few questions and had a few comments:


1."Remove the thin metal wire (from Expansion valve) that goes to a bolt under the throttle body. (engine bay)"

Do you mean to say "...a bolt under the hood near the firewall in the engine bay?
I don't see anything going from the ac system to anything under the throttle body.

2."Back inside if you have pulled all the wire harnesses apart and unscrewed all the bolts you should be able to pull right out. ...'

I think you forgot to mention 2 nuts (black) that hold the evaporator to the firewall.

3."Now find all the Gold nuts that are holding the blower and evaporator to the fire wall. 10mm bolt...."

Ive remove all the gold nuts i can get the evap case down about an inch, but blower case wont budge. Ive looked at your instructions repeatedly and looked under dash and hood and have all harnesses unplugged. are there any hidden nuts or screws holding in the evaporator?


I'm stuck and simply cannot remove the evaporator at this point.

Any advice can help.

dicer

Just have a suggestion. For things like removing the glove box substitute a plastic or a couple of plastic bondo spreaders or plastic scrapers like sold at harbor freight. Even consider the plastic pry bars too. Plastic is way less likely to ruin something. Just a heads up. Lexus manuals always say to use electrical tape on a flat blade screw driver when using it.

And great write up. Who makes the parts your selling?

jefferaven

have you had a chance to update the pix needed to help replace the evaporator on a 1991 ls 400?
thanks
JEFF

jefferaven

are the parts new, why selling, any details?
jeff raven472@msn.com

TWOBLACK

Can you please update your pictures on LS400 evaporator replacement? I have been stuck for hours trying to find the last bolt or two holding it in. I am working on a 92 model.

TWOBLACK

I am amazed you did it in 30 minutes. You are good.