- Thread starter
- #241
Sorry 16oz, was a typo. 3x 12oz = 36oz. So I've estimated 37oz -+1oz. IIRC: 36 oz is only just above minimum capacity.
Last edited:
A/C servicing; vacuum, oil and charge system?
- Thread starter 2001LC
- Start date
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The good thing about charging the system yourself (vs. taking it someplace) is that you can take the time to 'fine tune' the system.
'Chase' the last 2-3 degrees of vent temps. Adding or subtracting small amounts of refrigerant until you reach the point of diminishing returns.
A 'shop' is not going to do that. They want to get the vehicle in and out as quickly as possible.
When you get the vehicle up to highway speed and have had several cabin 'air exchanges', you should see even better temps. Good Job!
With rear air, you are fine up to about 38 ozs. Let the vent temps tell the story. Each system (because of previous service, wear, dirt, grime, etc) will be a little different.
07 LC w/ rear air, never hooked up an a/c machine so can’t really comment on state of charge but no complaints on ac performance.
Ambient temp reading between 91-93F
At a stop saw 45-50F, while driving saw 43-47F
Coolant temp 193-197F
Ambient temp reading between 91-93F
At a stop saw 45-50F, while driving saw 43-47F
Coolant temp 193-197F
- Thread starter
- #245
Pick this NEW Yellow Jacket 49967 Titan up today $160 plus taxI'm pretty sold on the 49967 set. It is a good quality analog set with all the features you might need.
To go 'up' from there, you are talking the newer digital sets that can run well over $1K
A good manifold set with good hoses and a 'good' 2 stage vacuum pump is all a person needs to get started IF servicing vehicles for a living. The DIYer/home mechanic that works on systems infrequently can do with less of course.
Most sets don't include the High/Low side connectors....as there are different styles and folks like to choose their own. Don't scrimp there and create a weak link in your equipment.
Yellow Jacket 49967 Titan Charging Manifold 4-Valve w/ Sight Glass & 3-1/8 Gauges 4 Hoses
Shop Yellwo Jacket HVAC Tools. Number 49967. Titan Charging Manifold 4-Valve with Sight Glass and 3-1/8 Gauges 4 Hoses. McCombs Supply Co. Fast Shipping!mccombssupply.com
YELLOW JACKET 49967 Manifold 3-1/8 with Gauges with Hoses for sale online | eBay
Find many great new & used options and get the best deals for YELLOW JACKET 49967 Manifold 3-1/8 with Gauges with Hoses at the best online prices at eBay! Free shipping for many products!
Pick this NEW Yellow Jacket 49967 Titan up today $160 plus tax
YELLOW JACKET 49967 Manifold 3-1/8 with Gauges with Hoses for sale online | eBay
Find many great new & used options and get the best deals for YELLOW JACKET 49967 Manifold 3-1/8 with Gauges with Hoses at the best online prices at eBay! Free shipping for many products!www.ebay.com
Be sure to get a set that includes R134a.
Yellow Jacket 49983 TITAN 4-Valve Test and Charging Manifold 3-1/8" Gauges (psi, F) for R-22, R-134a, and R-404A
- Thread starter
- #247
Oh NO! I just look to see the 49967. Now I see the listing heading states 49967, but picture of box shows 49867.
Is it just a matter of using/getting R-134a hoses for the manifold?
No, the gauges themselves need to have a R134a scale on them.
awesomeissquid
SILVER Star
Wanted to get some input from the experts here. The AC on my LC is one of the last systems I have not refreshed. Given a big trip coming up I figured I should ensure it is fully functioning.
Originally I thought the interior just ran hot given the amount of glass, but after rereading this thread I saw some references to the expected supply air temps and I am not sure I am getting there.
Obviously checking that is first on the list. I believe @flintknapper recommended trying to hit a 30-deg delta from ambient was a good starting place. Is that at idle or on the highway?
If I confirm I am not getting those temps, how should I move forward? Since I do have some cooling, I assume I am just low on refrigerant and not empty. I was thinking of getting some gauges to check the current charge and topping up. Is it possible that over the 26 years the system has just lost some charge or do I need to go into this assuming there is a leak somewhere?
From the thread I think I understood that some leakage is possible over time. I guess I hope that is all this is. From the service records I have, I could not find any AC recharge or service performed.
Is there a benefit to evacuating the system fully vs topping up?
Also what should I be seeing in the sight glass? I recall something in the FSM, but I honestly need to go back and reread it.
Originally I thought the interior just ran hot given the amount of glass, but after rereading this thread I saw some references to the expected supply air temps and I am not sure I am getting there.
Obviously checking that is first on the list. I believe @flintknapper recommended trying to hit a 30-deg delta from ambient was a good starting place. Is that at idle or on the highway?
If I confirm I am not getting those temps, how should I move forward? Since I do have some cooling, I assume I am just low on refrigerant and not empty. I was thinking of getting some gauges to check the current charge and topping up. Is it possible that over the 26 years the system has just lost some charge or do I need to go into this assuming there is a leak somewhere?
From the thread I think I understood that some leakage is possible over time. I guess I hope that is all this is. From the service records I have, I could not find any AC recharge or service performed.
Is there a benefit to evacuating the system fully vs topping up?
Also what should I be seeing in the sight glass? I recall something in the FSM, but I honestly need to go back and reread it.