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Evap leak???

73Wagoneer on Wed August 06, 2008 9:53 PM User is offline

Year: 94
Make: Honda
Model: Civic LX
Engine Size: 1.5
Refrigerant Type: 134
Ambient Temp: 90
Pressure Low: 40
Pressure High: 200
Country of Origin: United States

I have a small leak, A/C charge last 2 months, so today I deceided to locate it, I dont have a leak detector, but I have UV dye in system, everything under the hood looks good, I tried to drop the plastic cover around the evap, I could get it down just enough to see inside with a flash light, I did notice a dime size florescent color on the bottom of the stryofoam underneath the evap. Is it safe to say the evap is leaking or could it be something else?? also where can I find out out to take the evap out, at least the plastic cover, it had 3 bolts and 4 metal clips that I took off but it didn't seem like it wanted to come down, didn't want to break it. I want to get the parts ordered now, I will do the replacement this winter, unless the leak gets worse.

Thanks for the help in advance

Rob
El Paso TX

TRB on Wed August 06, 2008 10:48 PM User is offlineView users profile

Better bet is you have a o-ring gone bad on the expansion valve. The valve is inside the evaporator case.

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mk378 on Thu August 07, 2008 10:17 AM User is offline

There are several connections inside the evaporator case that can leak, so it's not necessarily the evaporator itself. To get inside the case you have to remove it from the car first. That is quite simple to do but you must recover the refrigerant and disconnect the lines at the firewall.

73Wagoneer on Thu August 07, 2008 8:57 PM User is offline

Got it, so best thing take it apart, opps let me back up, recover refrigerant, take it apart replace all o rings, then charge and wait and see?? The system is 1994 stock, I have not done or replace anything to it since buying it new in 94, any replacements parts needed while im in there, thats a lot of work for o rings.

Understand about taking the evap out to take the plastic case off. thanks
Thanks
Rob

Edited: Thu August 07, 2008 at 8:58 PM by 73Wagoneer

73Wagoneer on Thu August 21, 2008 10:20 PM User is offline

Just ordered o rings, drier, oil and air pump should I replace the expansion valve as well???

mk378 on Thu August 21, 2008 11:14 PM User is offline

If it's cooling OK, just leaking, no need to replace the TXV. Unless of course it turns out to be the leaky part.

TRB on Thu August 21, 2008 11:21 PM User is offlineView users profile

Quote
Originally posted by: mk378
If it's cooling OK, just leaking, no need to replace the TXV. Unless of course it turns out to be the leaky part.

Agreed, 73Wagoneer thanks for the support! I would suggest some Nylog if you don't already have a bottle.


Today I had to replace an o-ring on my mountain bike fork. I even slapped a little Nylog on the o-ring.



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Contact: ACKits.com

Matt L on Thu August 21, 2008 11:27 PM User is offline

Nylog was never a stocked item at any bicycle shop that I worked at, and that was a few. Of course, the bicycles that we sold and serviced all lacked AC. So did my car at the time.

I was a bicycle mechanic for eight years while in college and graduate school. However, hydraulic forks were just coming out when I left that business. I would have just used the fork oil, but I doubt that the Nylog will cause any trouble.

I have built some wheels though. Probably more than 200 pairs over the years. My fastest time is a pair of wheels in 65 minutes, starting with a pair of rims and hubs. It takes about five minutes to find the appropriate spoke length, so that's an hour left to complete the job. These were not "slapped together" either.

TRB on Thu August 21, 2008 11:37 PM User is offlineView users profile

I just used a very small amount on the o-ring it self. It's on the damper rod and once set never moves. 6 ounces of oil in the damper leg and 1 ounce in the compression leg. This is an all air sprung fork from White Brothers. Just got in from a ride and it worked fantastic.

Ventana El Rey 29'er.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

73Wagoneer on Fri August 22, 2008 9:36 PM User is offline

Already got a bottle of nylog when I repaired the 73 Wagoneer A/C. Hopfully the expansion valve is not the culprit.

Thanks again for all the expert advise, even the nylog on the bicycle shock o ring, makes sense

TRB on Sat August 23, 2008 10:26 AM User is offlineView users profile

Quote
Originally posted by: 73Wagoneer
Thanks again for all the expert advise, even the nylog on the bicycle shock o ring, makes sense

I'm sure the local bike shop would not approve of doing such a thing. Where this o-ring is located the Nylog can't gum anything up. So I took a shot that it will help keep the o-ting lubed and maybe not fail again. If Chick can put tit in his coffee. I figured it would be OK on my mountain bike.



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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

73Wagoneer on Wed August 27, 2008 8:01 PM User is offline

Well things didn't work out like I wish they had, thought it might just be "O" ring replacement, once I got the evaporator out it was obvious that I had a leak on the evap, there was dye on the fins and also at the bottom of the plastic case holding the evap. I have posted a couple of pics, you can clearly see how the evap was leaking and the dust was clinging to the oil bathed evap fins, sorry the pics are so big I don't know how to make them smaller.

TRB I'll be ordering the evap in a couple of days

Oh yeah, now that I am replacing the evap, how much oil do I need to put in?? and where can I get the foam tacky tape that was holding the capilary tube onto the evap pipe?








Edited: Wed August 27, 2008 at 8:14 PM by 73Wagoneer

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