Uncle Gump
Token Old Guy
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VAGABOND
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- Joined
- Sep 17, 2018
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- Ottawa IL
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- 2006/1986
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- Ranger/BroncoII
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- 4WD
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Fill levels will change slightly when you start mix matching parts. We delbt with that when I was teaching at the Ford dyno lab in Dearborn. They had all kinds of parts that got mix matched to make a system operational for testing. I worked with engineering to develop a class to cover this.
What it boils down to is evaporator inlet vs. Evaporator outlet temperatures. When a system is low... the inlet will be colder the the outlet. The very time when filling that the inlet and outlet temps are identical... the system is full. It's fool proof.
You would be surprised how sensitive your fingers are to a few degree temp change. Use lite touches on the pipes... you'll be surprised how close you can get it. At the dyno lab... we used thermocouples to monitor temps.... most diyers don't have that luxury.
What it boils down to is evaporator inlet vs. Evaporator outlet temperatures. When a system is low... the inlet will be colder the the outlet. The very time when filling that the inlet and outlet temps are identical... the system is full. It's fool proof.
You would be surprised how sensitive your fingers are to a few degree temp change. Use lite touches on the pipes... you'll be surprised how close you can get it. At the dyno lab... we used thermocouples to monitor temps.... most diyers don't have that luxury.