Archived AC Line Torque Specs

[jgallentine]

Haven't got a manual yet and am in the process of replacing the air conditioning suction/fluid line on my 99 3500. This is the line that bolts to the back of the copressor and has two lines off of it. One goes back to the dryer the other goes up to the condensor in front of the radiator.



I need the torque spec for the bolt holding the lines to the back of the pump and the spec for the bolt holding the line to the condensor.



Also, if you could look and see what kind of seal/o-ring is used on the line going to dryer I would appreciate it. The dealer could not find anything for that end.



Any help would be appreciated as I would like to get this thing back together and charged. it's been rather warm here in the Midwest.



Thanks



PS--If you're interested in preventing a problem, you might want to ckeck the routing of your air conditioning line. The line going from the pump to the condensor was pressed against the boost duct going from the turbo to the intercooler. The constant vibration of the engine caused the aluminum part of the line to wear through where it was up against the boost duct. :--) I have heard that this is not an uncommon occurrence.

 

[B.G. Smith]

Ok J, the torque for the bolt holding the lines to the compressor is 200 inch pounds, that ain't much, about 17 ft. lb. Torque for the condenser connection is 180 inch pounds. The connection at the accumalator/dryer ( and others that are the "garter spring" release type ) has two "o" rings in each connection. This info is from a 99 manual. Hope this helps, also hope it's not as hot there as it is here. bg

 

[jgallentine]

Thanks for the information B. G. You're right, that isn't much torque but, luckily, I have a Snap-On inch-pound torque wrench to do the job.



I figured there were probably o-rings in that connection but I have never had one like that apart before so I couldn't swear to it. I told the dealer that I thought there was but, as usual, they were not real interested in helping. The folks that I know at Firestone who are going to fill it say it should be fine without the new o-rings but I sure would feel better if I could locate them.



By the way, I am guessing it's a little warmer down there in Texas. It's been running in the low 100s here this week with the humidity pushing the heat index into the teens. Fortunately, I have another car to drive but I need the truck to pull this week-end.



Thanks again for your help.

 

[B.G. Smith]

AC

It has been in the upper 90s here but the humidity is way up there. You can get the "o" rings at most auto parts places, they come in sets with a new garter spring, if the Firestone store does a lot of AC work they will have them too. Good luck. bg