AC Refresh 01
by
, 12-08-2016 at 01:32 PM (8168 Views)
Started to work on my NSX for the major A/C Refresh.
About 4 years ago, I started noticing the slow leakage from my evaporator.
http://www.nsxcb.co.uk/entry.php?784-A-C-Evapo-Leakage
It was such a small leakage that I didn’t even had to top up the refrigerant for years.
However, the leakage got worse over the time and especially this year,
the leakage has accelerated that I started to get not so cold air inside the cabin.
I was worried about losing the compressor oil too much with reduced refrigerant circulation that
I decided to disable the compressor itself.
Well, last month, to my surprise, I found out that there was no more refrigerant left in the system;
http://www.nsxcb.co.uk/entry.php?1805-I-must-fix%85
Very bad news because there is no positive pressure to prevent the moisture getting inside the a/c system and
now it can enter freely from wherever the leakage at the evaporator.
I was planning to flush the a/c system any way so no big drama but
just worried that it could cause further damages as
the moisture plus a/c refrigerant/oil would produce acid.
While removing the dashboard, I hope I can service my gauge unit and the SRS unit as well.
Thank you to member flyingsniffer for letting me use his a/c flushing kit.
I actually bought (supposed to be exactly) the same kit from the same seller so that I can use it for other purposes.
His kit on the left and mine on the right….
I didn’t even receive the spare o-ring or the rubber nozzle…
My gauge is not zeroed at all…..
Not an issue as I'll be using the regulator at the compressor to adjust the inlet pressure but
probably I'll use flyingsniffer’s kit as the bottle construction looked better.
Over the last 22years and over 150K miles, I replaced my radiator several times.
It’s a consumable parts, just like the eng oil filter.
In order to replace the evaporator, I must first drain the coolant as the heater core is inside the same unit where the
evaporator sits so already bought the Koyo radiator and the coolant hoses, etc.
Unfortunately, there is one parts on back order until the end of this month and although I already have one in stock,
I must keep it for the other owner because Honda already delayed the estimated delivery schedule twice….
Although there is no sign of leakage from my radiator,
still, after looking at the state of the core fins,
I really want replacing it so something to be done in the future….
For the similar reason, I already purchased the 2 x a/c pipes sitting in front of the radiator.
They are exposed to the impact from the stones, debris, etc so ideally,
you want replacing them at the time of a/c refresh.
Unfortunately, the fitting at the R & L a/c condensers are known to seize as
they are also exposed to the road debris, salt, water, etc.
As they are aluminium, if you force it, you will simply strip the thread and
being forced to replace the entire condenser.
Not too expensive but time consuming as you will be removing the front bumper.
It’s my policy not to touch the front bumper unless I really have to because
adjusting the alignment is so delicate that even changing the tiny amount of torque
will affect the gap.
Although I have the new pipe, I didn’t feel comfortable after applying big torque so
going to leave the 22mm fitting….
Not easy to flush the condenser without disconnecting this thick pipe but
better than being forced to replace both condensers.