A/C Reinstall
More Turbo
Joined: Jan 2007
Posts: 622
Likes: 55
Both of the r134a ports on my truck have the valve core screwed directly in the port; there may be an old R-12 port lurking in behind/under there; but, it sure doesn't look like any kind of add-on adapter.
My truck did have R-12 as original.
I need to investigate this more thoroughly; I wish I had thought to check it out when the system was empty.
Will the old original R-12 connectors unscrew to be replaced if necessary; if so, then my old R-12 ports may have been completely removed and the r134a screwed in their place.
My truck did have R-12 as original.
I need to investigate this more thoroughly; I wish I had thought to check it out when the system was empty.
Will the old original R-12 connectors unscrew to be replaced if necessary; if so, then my old R-12 ports may have been completely removed and the r134a screwed in their place.
Cargo Master
Joined: Sep 2006
Posts: 2,120
Likes: 390
From: Evansville, Indiana
New dryer and high pressure hose
More Turbo
Joined: Jan 2007
Posts: 622
Likes: 55
I wish my own experiences with the self-sealing cans was good enough that I would trust them to hold.
I have the proper tap for them.
My experience has been that any remaining refrigerant in the can will come spewing out as soon as the tap is removed.
I had a can from Walmart that not a drop would come out when I had it connected to the hose; but, when I finally gave up and removed the tap, every last drop in there spewed out into the elements, all $10.99 of it.
They for certain are not as reliable as Propane Bottle Torch cylinders have been ever since even before I was born; you can screw on the torch, thaw out a lock, then remove the torch and set the can in the closet; thirty years later, you can go to use it again, and every last drop will still be in that cylinder.
Although I have not ever tried it out for dependability, and may never get the chance now as I only have a very few old cans left, all of my can taps have Shraeder Valves where the hose screws on and are supposed to retain a partial can indefinitely if you leave the tap screwed to the can and remove the hose.
I have the proper tap for them.
My experience has been that any remaining refrigerant in the can will come spewing out as soon as the tap is removed.
I had a can from Walmart that not a drop would come out when I had it connected to the hose; but, when I finally gave up and removed the tap, every last drop in there spewed out into the elements, all $10.99 of it.
They for certain are not as reliable as Propane Bottle Torch cylinders have been ever since even before I was born; you can screw on the torch, thaw out a lock, then remove the torch and set the can in the closet; thirty years later, you can go to use it again, and every last drop will still be in that cylinder.
Although I have not ever tried it out for dependability, and may never get the chance now as I only have a very few old cans left, all of my can taps have Shraeder Valves where the hose screws on and are supposed to retain a partial can indefinitely if you leave the tap screwed to the can and remove the hose.
Moderator
Joined: Jan 2001
Posts: 56,977
Likes: 2,733
From: Virginia
Do you have a o-ring in the top of that cap? Some of them do have o-rings and sometimes they get lost. You can try stuffing a o-ring up in the cap and snugging it down to help stop the leak.
Cargo Master
Joined: Sep 2006
Posts: 2,120
Likes: 390
From: Evansville, Indiana
The caps have a threaded protrusion inside that threads down into the adapter.
Shown here I have already drilled a concave relief to modify the original convex contour.
This relief provides a depression for the valve core pin to sit down in instead of the original convex (bump) which apparently was pushing on the pin.
I did try out some o-rings but couldn't find a satisfactory solution.Too thin they shifted around causing the cap to go cocked. Too thick and they didn't allow room to engage the threads well.
Thread Starter
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Mountain Pass
Joined: Apr 2022
Posts: 249
Likes: 38
From: Wilmington
I did a visual inspection of the entire truck today. I see no oil from the compressor anywhere. But I did at the caps. I am not sure if that may be the cause—that the cap is triggering the valve core?
the rest of the system is new, but looked at the condenser closely (which is also new). No oil leak there that I can see. None on the accumulator , and none in the lines. The Evap (also new) when I got a look at it from the cad in the blend door fix, no visible oil.
More Turbo
Joined: Jan 2007
Posts: 622
Likes: 55
Someone earlier said their cap was contacting their valve-core.
I would surmise that the thick O-Ring seal is absent, thus allowing that center protrusion in the cap to contact the valve.
The as-delivered seals in most I have investigated are not normal O-rings, but flat-cut rubber washer seals.
You can find assortment boxes of washer seals in both SAE and Communist sizes for sale at Amazon..
I would surmise that the thick O-Ring seal is absent, thus allowing that center protrusion in the cap to contact the valve.
The as-delivered seals in most I have investigated are not normal O-rings, but flat-cut rubber washer seals.
You can find assortment boxes of washer seals in both SAE and Communist sizes for sale at Amazon..
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Thread Starter
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Mountain Pass
Joined: Apr 2022
Posts: 249
Likes: 38
From: Wilmington
Someone earlier said their cap was contacting their valve-core.
I would surmise that the thick O-Ring seal is absent, thus allowing that center protrusion in the cap to contact the valve.
The as-delivered seals in most I have investigated are not normal O-rings, but flat-cut rubber washer seals.
You can find assortment boxes of washer seals in both SAE and Communist sizes for sale at Amazon..
I would surmise that the thick O-Ring seal is absent, thus allowing that center protrusion in the cap to contact the valve.
The as-delivered seals in most I have investigated are not normal O-rings, but flat-cut rubber washer seals.
You can find assortment boxes of washer seals in both SAE and Communist sizes for sale at Amazon..
communist size….LMAO!
Moderator
Joined: Jan 2001
Posts: 56,977
Likes: 2,733
From: Virginia
Someone earlier said their cap was contacting their valve-core.
I would surmise that the thick O-Ring seal is absent, thus allowing that center protrusion in the cap to contact the valve.
The as-delivered seals in most I have investigated are not normal O-rings, but flat-cut rubber washer seals.
You can find assortment boxes of washer seals in both SAE and Communist sizes for sale at Amazon..
I would surmise that the thick O-Ring seal is absent, thus allowing that center protrusion in the cap to contact the valve.
The as-delivered seals in most I have investigated are not normal O-rings, but flat-cut rubber washer seals.
You can find assortment boxes of washer seals in both SAE and Communist sizes for sale at Amazon..
FTE Legend
Joined: Nov 2015
Posts: 30,876
Likes: 4,115
From: Angier, NC
You guys bring up the caps pushing on the valve core causing a leak I wounder if that is what is going on with my system?
After about the 3rd or 4th time filling the system, first few were my fault
I cant find anything so now will have to check the caps.
Dave ----
After about the 3rd or 4th time filling the system, first few were my fault
I cant find anything so now will have to check the caps.Dave ----
Lead Driver
Joined: Nov 2013
Posts: 7,162
Likes: 1,169
Some soul here suggested I look at the bottom side of the hood right above the compressor; and, sure enough, there it was, a big long oily streak exactly above the space between the compressor and clutch.
I put a brand-shiny-new compressor on there and it hasn't lost nary a drop since...
I put a brand-shiny-new compressor on there and it hasn't lost nary a drop since...
Now, this is just my own opinion and may not be anyone else's; no matter how old the truck, it is highly doubtful that you are going to find a leaking evaporator.
Unless you follow dump trucks coming out of the quarry much too closely with #57 Limestone bouncing off the blacktop and through your grill, it is highly doubtful that a condenser will ever develop a leak.
Unless you follow dump trucks coming out of the quarry much too closely with #57 Limestone bouncing off the blacktop and through your grill, it is highly doubtful that a condenser will ever develop a leak.
More Turbo
Joined: Jan 2007
Posts: 622
Likes: 55
I read a big long article concerning those "GoodYear Heaters" mini-split systems and why they have earned the name "GoodYear" = they are only good for about a year.
I got sucked into three of the things and wish I had never seen them.
Anyhow, what the article said was that all those little units, no matter the name on the box, are made in one plant and everything Aluminum is made from recycled Aluminum.
Recycled Aluminum has no flexibility; instead of giving and taking with changing temperatures and pressures, it just develops millions of tiny fractures, which is why with those units you just chase leaks and never get done.
All that being said, it would behoove a person to be leery of anything recycled so far as evaporators, condensers, and the like; as, if it applies to those GoodYear Heaters, it probably applies here as well.
I got sucked into three of the things and wish I had never seen them.
Anyhow, what the article said was that all those little units, no matter the name on the box, are made in one plant and everything Aluminum is made from recycled Aluminum.
Recycled Aluminum has no flexibility; instead of giving and taking with changing temperatures and pressures, it just develops millions of tiny fractures, which is why with those units you just chase leaks and never get done.
All that being said, it would behoove a person to be leery of anything recycled so far as evaporators, condensers, and the like; as, if it applies to those GoodYear Heaters, it probably applies here as well.
Thread Starter
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Mountain Pass
Joined: Apr 2022
Posts: 249
Likes: 38
From: Wilmington
I was assuming part of that was the residual from the manifold guage measuring the pressure. I could see some escaping from turning the valve open and close. But I dunno.
Moderator
Joined: Jan 2001
Posts: 56,977
Likes: 2,733
From: Virginia
Could be. A good reason to clean up afterward with brake cleaner. I had a problem with a chevy leaking, the factory actually put dye in that system, and you could see the green dye with the naked eye around the service port. But like you said it could have been from servicing the system, so I had to clean it up really good and check back a week later, and it was green again.