Question about 2004 Jeep Grand Cherokee
The A/C system will need to be placed under a vaccum of at a min. of -29.5 HG to verify the seal held and removed the water caused by being open to the enviorment (humitiy ) will cause water in the system witch will damage the matter in the receiver dryier. there is a specific amount and proceedure that will need to be followed to the letter to place a precharge, bypass the low pressure cutoff switch. extream cauation should be used as the Hihg pressure gas and fluid is both very hot and extreamly hi . I would really recommend if you dont have experance and licensed take it to the shop and get it done it will be chaeper that a hospital bill and the repairs if you get it sealed up right it should only cost the evac fee normally .5 hrs labor and R134 of about 2 lbs here in Calf, labor at a normal shop on A/C specials are 40.00 and 19.99 per lbs of R 134 BE CAREFUL
35 yrs ASE
univ A/C cert.
Posted on Oct 24, 2012
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Posted on Jan 02, 2017
Jeep GrandCherokee SUVs manufactured in or before 1995 use R12 refrigerant. You must
retrofit these SUVs to accept R134 refrigerant using a retrofit kit
available at your local auto parts store before you can recharge the
system. In some areas, a license is required to retrofit an air
conditioning system. If this is the case in your area, take your Jeep
to a professional to retrofit the system.
Never try to evacuate the system yourself. A license and special equipment is needed to evacuate the system. Attempting to do this yourself will release refrigerant into the air, which is a federal crime.
Good luck (rated this help).
Posted on Aug 11, 2009
Take it back to the shop that fixed it or if you did it yourself, check that you didn't disconnect a sensor/plug from the transmission.
Posted on Mar 10, 2010
I searched pep boys, advancedauto and autozone and found no PCV valve listed for your 4.7.
I can say however that the last model Jeep (WJ) with the 4.7 had a PCV valve (cuz I owned one), and yes it was on the side of the engine.
You may also like to know that 4.0 (ZJ) Jeeps dont have PCV valves as well (cuz I owned 2) however the V8 (ZJ) V8s do have one (cuz I owned the rare 5.9).
Hope this helps.
Posted on Dec 29, 2010
Testimonial: "Thank's I'm looking because, well the engine has just started to let off a cloud of smoke at start up. and that may be the problem."
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