2002 Toyota Sequoia Complete Air Conditioning Rebuild

[@koomo801]

I used a coil gun (Nu-Calgon's, which is the same one for home a/c condensers) to clean off my 2000 Tundra's a/c condenser (and the little bit of radiator that is exposed) and a lot of oil and dirt came off. It wasn't visible to the naked eye before cleaning but it was certainly there, and a lot of it. It took three cleanings before it removed all of the oil (you'll see an oil sheen in the runoff if you are still removing oil). Years of highway driving with the light ends of asphalt getting kicked up from vehicles ahead of you will eventually lightly coat your condenser. The cleaning made a huge difference. For the cleaner, I used the Nu-Calgon Nu-Brite. Rinse thoroughly or it will eventually mar your paint.

[@antonioboyd4225]

Great thorough video without senseless banter. Good job!

[@mrpantieraider1]

thank you for this video!

[@johnlivingston9217]

Nice job with a very detailed video bud, I did the same to our 2001, but when done, temp only got down to about 75 in 90 degree day, scratching head wondering what else is needed to get it colder? Maybe changing the hi-lo pressure switches next?

[@wrenchwranglers]

If I remember correctly these have a trinary switch. Which monitors high pressure cutoff, low pressure cutoff, and fan off/on points. If the compressor and fan is cycling on properly, it’s probably not the switch. It is possible that the mixing/blend door valve can get out of adjustment…. I would probably verify that first. You can reach up under the passenger side and see it buried under the hvac box. You can make sure it is moving full range by watching it. If that and everything else is working properly and all your pressures are correct, then it needs some more detailed troubleshooting. At that point I would probably start measuring superheat and so forth and looking for possible trouble points in lines, like obstructions or sudden temp changes in lines where there should not be.

[@johnlivingston9217]

@@wrenchwranglers Thank you for the tips, I'll go through to check point by point.

[@mrdior1222]

Well needed

[@treefrogskis]

Thanks for this! And for using the correct terminology! I've kinda been procrastinating this job on wifes car for a while. Actually looks easier than the Fords and Dodges I've done. What were your pressures at once to got it charged up?

[@wrenchwranglers]

I don’t remember the exact pressures, but it would have been in the spec range for r134a relative to the ambient temperature. I usually charge by weight when I can, but fine tune by pressure/temperature charts where necessary.

[@treefrogskis]

@@wrenchwranglers Hey, thanks for the reply! The reason I was asking about pressures is, on mine I'm running 55psi suction and around 225 discharge at 80F ambient. Blowing about the same as yours 59-60F at the vent. These pressures seem pretty high for R134A.

[@_lika_dedicated_4105]

у нас в россии многие выбрасывают кондиционер а его испаритель подключают к системе охлаждения двигателя ,тогда салон быстрее прогревается

[@wrenchwranglers]

Like a second heater… that’s really smart for very cold climates.

[@dml2205]

why its not cooling? did you find the problem?

[@wrenchwranglers]

In this particular one, it won’t go below 60 degrees. I checked the blend doors, heater shutoff, etc., with no success. Rather than throw more money at it tearing it down again, we opted to let it ride at its current point.

[@DATDS2]

@@wrenchwranglersneeds more airflow trough condenser with the help of another condenser fan and the removal/re positioning of the transmission cooler which just adds unnecessary heat to the condenser, design flaw

[@emmanueld.dejesus584]

Thanks!

[@wrenchwranglers]

Thank you so much!!

[@What-ut8vu]

i just replaced ac compressor condenser condenser fan receiver drier expansion valve evaporator core and still not blowing 40 did you ever find out the problem?

[@wrenchwranglers]

I spent a long time double checking everything and even checking blend door function and all the little things. Short of tearing it down again and checking the actual thermostatic expansion valve adjustment I ran out of things to check. Everything I found was operating normally. It still will not go below 60 degrees, but we opted to settle for that rather than throwing more money at it. If we ever discover something verifiably wrong with it I will post an update.

[@What-ut8vu]

@@wrenchwranglers i just read article yesterday toyota had tsb updated suction line. Bigger in diameter and built in inline filter is yours updated line?

[@wrenchwranglers]

@@What-ut8vu I am not sure. I did not see that TSB but that is good info. Do you know the size difference so that it could be measured and checked?

[@DATDS2]

@@What-ut8vuu have a link for that article? im interested

[@What-ut8vu]

@@DATDS2 you can search google toyota sequoia ac compressor durability improvement tsb