So the compressor on my small block swapped car went out. Looking for a replacement. Its what was on the car when I acquired it, it has custom mounts.
It looks pretty much the same as the V5 from an 87 4 cylinder Fiero, serpentine driven.

One question is can the compressor be mounted with any side up? As long as you can hook up the wire does it not matter? If not, how do you know which way it should mount, does the drain plug always go down, etc?

Question two is about R12 or R134 "control valves". The descriptions sound like this is a part that is built into the compressor, some rebuilts say for R12.
What happens if you use one that says the control valve is for R12, with R134?

Anyone used an inline filter before?

Thanks

[This message has been edited by 2.5 (edited 08-01-2017).]

Step no 1. Important! First determine if your lines are clear of debris. When a compressor lets go, it sometimes explodes internally and causes clogged lines due to "black plague." If there is any sign of this , the lines must be thoroughly flushed and the condenser replaced. I would guess that the compressor needs to installed with the drain plug facing down. Every one that I have seen was installed this way so there must be a reason why.
When replacing new orifice tube is a must and new O rings are a good idea.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

Many compressors has oil sump and must be installed right or you will kill them.
I don't remember how to tell up for a V5.
try see 87-88 Fiero and other SM for V5.

V5 does have a oil drain plug but might not be the lowest hole on the case. Could be like many rear ends and other things drain hole is also fill hole.

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

I 2nd to check for black death. Pull the orifice tube and check for debris although if it reached the tube its in the condenser too.

In my 88 coupe the "drain plug" is facing up and the control valve is facing down.

JUST LIKE IN THIS PICTURE:

Hmm, ok so a couple things.

The compressor I have is mounted drain plug down, is there a way to find out of that actually matters?

Also can condensers be cleaned inside? If not anyone have a good source for a replacement?

Seems like the only place I've seen lately that makes new was on ebay.

http://www.ebay.com/itm/84-...AOSw~AVYm7PE&vxp=mtr

Member straws was also selling a used condenser as part of a package in the mall recently. Would probably be willing to separate.

[This message has been edited by da.slyboy (edited 08-02-2017).]

quote Originally posted by 88cryan: I 2nd to check for black death. Pull the orifice tube and check for debris although if it reached the tube its in the condenser too. In my 88 coupe the "drain plug" is facing up and the control valve is facing down. JUST LIKE IN THIS PICTURE:

Thanks. Though the control valve in that pic is facing the side,
if it were down, the drain plug would be on the side... it shows the same in this pic:



I found this which says the control valve should be facing down. But technically it isn't on yours?

“All variable stroke compressors have the third pressure chamber- known as crankcase pressure-
and it is where all the important moving parts that need lubricated exist, typically, there is always
at least 3 ounces of oil residing in the crankcase- the guide pin slider needs to be under oil at all times,
this is why the V-5s all have mounting criteria, always with the control valve down- so that the oil
pools around the slider mechanism inside.”
http://acsource.net/acforum...topic.php?f=1&t=7796

?

[This message has been edited by 2.5 (edited 08-02-2017).]

It is downward at an angle but that is how the factory mounted it. The rear support bracket only mounts one way.

Btw I didn't see that you asked about control valves, I replaced my compressor and was having poor performance so I switched to the 37.5 green dot valve. I now get 34 degrees at blower speed 2 max ac.

Apparently they switched to a valve with a middle pressure setting (one size fits all) GDP actually told me that the one in my new compressor works for r12 and 134a. That may be true in most cars but from what I read the longer the distance from compressor suction port to the evaporator the lower pressure valve you want, and a fiero is about as far as you can get.

My post v5 performance

[This message has been edited by 88cryan (edited 08-02-2017).]

quote Originally posted by 88cryan: It is downward at an angle but that is how the factory mounted it. The rear support bracket only mounts one way. Btw I didn't see that you asked about control valves, I replaced my compressor and was having poor performance so I switched to the 37.5 green dot valve. I now get 34 degrees at blower speed 2 max ac. Apparently they switched to a valve with a middle pressure setting (one size fits all) GDP actually told me that the one in my new compressor works for r12 and 134a. That may be true in most cars but from what I read the longer the distance from compressor suction port to the evaporator the lower pressure valve you want, and a fiero is about as far as you can get. My post v5 performance

Nice thread. Cool about the control valve, if it makes it blow colder I might get that green one. It just screws in and out of the new compressor before install?
I'm not sure I understand the science behind it, or the purpose of different rated control valves, so is it a problem if my car may be revving 3k rpm for extended periods?
I wouldn't want to freeze something up in the system or cause it to work harder than it should. Thanks

[This message has been edited by 2.5 (edited 08-03-2017).]

quote Originally posted by 2.5: Nice thread. Cool about the control valve, if it makes it blow colder I might get that green one. It just screws in and out of the new compressor before install? I'm not sure I understand the science behind it, or the purpose of different ratied control valves, so is it a problem if my car may be revving 3k rpm for extended periods? I wouldn't want to freeze something up in the system or cause it to work harder than it should. Thanks

There is a c clip holding it in and after you remove the clip it pulls out plus the new valve came with a filter. The valve regulates the suction pressure, I don't know if the compressor If working harder per say but it just allows the low side to go lower. Yes the only risk is freeze up and 34 degrees is pretty close but it hasn't happened to me yet and I'm not the first person to do this, I found another thread from many years ago and pm'd him to see how it worked and it was still in there and worked.

So, about the rotational direction when mounting.
I see the ones for a Fiero (1987 4 cyl) say a 2 o-clock coil.
So.. I assume that means when mounted and looking at the belt end the electronic plug is at 2 o clock?
If so, this would put the drain / fill plug around 3 o clock and the control valve around 6 o clock (approx.).

I wonder if there are any experienced folks who can confirm that is what 2 o clock coil means?

quote Originally posted by 2.5: Another thing I noticed, recommended for the same application (87 Fiero with a duke) we have a compressor with a 127mm clutch and one with a 110mm clutch. So the smaller one is going to spin - and in turn pump faster, right? GPD 6511316 and GPD 6511314

One of those is the correct 6 groove belt and the other is 5 groove which is wrong for a fiero application.

I have no idea about the coil location, it sounds like it is the position of the coil connector but idk. The fiero compressor spins clockwise.

[This message has been edited by 88cryan (edited 08-03-2017).]

quote Originally posted by 88cryan: One of those is the correct 6 groove belt and the other is 5 groove which is wrong for a fiero application. I have no idea about the coil location, it sounds like it is the position of the coil connector but idk. The fiero compressor spins clockwise.

Thanks, at least that explains itself.

V5 Does Matter how you mount them.
Coil clocking is likely based on base orientation.
87 Fiero SM...

[This message has been edited by theogre (edited 08-14-2017).]

quote Originally posted by theogre: V5 Does Matter how you mount them. Coil clocking is likely based on base orientation. 87 Fiero SM...

Good info, verifies what I suspected regarding mounting, thanks!
This will cause me to have to modify the hose ends more but so be it.

overview of parts see https://www.youtube.com/watch?v=X-mDBudWESE
and other teardowns

Guide pin must get oil. Why takes 3-6oz in the drain hole. more you rotate the case to mount the pin location climb up.

[This message has been edited by theogre (edited 08-16-2017).]