DENSO Aftermarket - how to balance the compressor oil level 

I sure wish I had watched this video a couple months ago...

I like how the guy "takes out" the compressor in less thn ten seconds! Great info video.

Who was the genius that decided to make a compressor without a drain plug?

Lets not forget to stand the compressor up on its clutch end to oil the shaft seal. 10 minutes of vertical with a turn or two of the compressor innards will ensure no leaks.

Yeah, it never works this way. I don't think I've ever taken out a (modern) compressor that had any measurable quantity of oil that would drain out of it. Very few of them actually have a drain plug, and sometimes they just won't flow oil out of their ports. And very rarely do I see a new compressor come with any measurable oil in it. I just had one the other day that had a sticker saying it had 0.5 oz in it. That's nothing. That's enough to coat the internals. It is, unfortunately, a guessing game. Most mechanics know to add oil when replacing the compressor, but just go by intuition and experience. For a normal modern system I usually add 3oz with a new empty compressor. Maybe a bit more if the system has been flushed or other parts replaced. Maybe a bit more if the system is larger. Having the original oil charge information helps. But like I said, it's a guessing game. And obviously if the old compressor grenaded itself, throw away the condenser and flush everything else. Modern condensers have tubes so small in diameter that you will never be able to flush them properly.

I remember when i had argument years ago with one another local mechanic about the same thing, he did not perform any kind flush and oil balancing operation, he just took new unit tossed it in and thought everything is good, few months later same customer were back and demanded repairs again...compressor were locked up :D

Very helpful, for any of my future repairs. Thanks denso.

I made a system for an rv with denso compressor. No manual, therefore, to consult for the proper amount of oil. This system has components "vertically spread"...the condenser is about 7 ft below the evaporator. Compressor approximately in the middle.. I suspect that oil would tend to accumulate in the condenser, possibly under oiling the compressor, the only part that really needs it. The lack of information or guidance on this is frustrating...it works, I must not be too far off. If a company would like to sell to fabricators, I suggest they give thorough info on this, it is very important.

Thanks denso man

Very useful information. I am about to replace the AC compressor on my Audi S4 B5 and want to m make sure I do everything right. I think I will probably flush the AC system whatever the condition of the oil as I prefer the belt & braces approach.

Drain the old compressor and measure the oil, drain the new compressor and add that much back in. Done.

Why do you make models of compressors that you can’t oil balance? Just increasing costs for customers with the extra work required

This only works if u didn’t previously have a leak, if u had a leak there’s no way to know what you’ve lost.

👍👍

I guess my ac system has too much oil in it since didnt drain the new compressor

My old Hilux's system holds 0.6-0.7 kg of 134a. I guestimated how much oil to leave in the new compressor. Fortunately, it took 0.65 kg, is nearly silent, and is as cold as a penguin's bum.

1:19 , basic maths out the window .

😂😂😂 Absolutely rubbish… most compressors die horribly sending metal fragments through the whole system and the oil is yellow. The whole system needs replaced because you can never get the entire system clean and will destroy the new compressor .

You are flushing the system with refrigerant? That doesn't seem to be a good idea... or even possible!