454 Vortec Swap A/C info needed

[wheels87k5]

Slowly getting the front end reassembled.

1. Looking for the parts that attach to the ports, driver and passenger side, top of the water pump. Both ports are threaded. Driver side is for the hose that goes to the lower intake plenum. Passenger side I'm betting goes to the heater core.......but which port on the heater core? 3/4" or 5/8"
2. There is a quick disconnect located on top, passenger side, of the lower intake plenum. I'm betting it also goes to the heater core. 3/4" or 5/8"?

3. There is an electrical connector on the lower intake plenum above the port from the water pump. What is that for and connects to?

4. On the driver side, above exhaust manifold, half way down the head toward firewall is a port. I believe I have the part but want to know what it is.

5. Heater hose route diagram or pics.

Any and all pics are greatly appreciated. Links also.

I've looked at google for some close-ups but not finding what I need.

 

[HankScorpio]

I am working on a 454 swap. I am using vortec accessories but on an older block.
1. I plugged the second water pump port, going to run heat out of intake to heater core and back to the radiator port I think.
2. I think you are correct on the heater hose but not sure on size.
3. I think that is a coolant temp sensor.
4. Also a temp sensor, the 350 I am replacing had a temp sensor in the same location.
5. I don't have a pic, making this up as I go, project is under way now.

 

[wheels87k5]

Does the water pump go to the inlet of the heater core and the lower intake plenum go to the outlet of the heater core? It would be my guess but I don't want to hook them up wrong.

 

[skunked]

5/8” from the intake manifold to the heater core and out the heater core with 3/4” to the pump. Pre-vortecs should also have a bypass hose between the pump and intake manifold.

 

[HankScorpio]

So the 92 I pulled my 454 from had the 2nd port from the water pump plugged. The bypass was installed but flow from the heater core went to the radiator, not to the pump.

 

[skunked]

So the 92 I pulled my 454 from had the 2nd port from the water pump plugged. The bypass was installed but flow from the heater core went to the radiator, not to the pump.

yep, some run out the heater core to the radiator.

Edit- found a pic of my gen 6 configuration

 

[wheels87k5]

@skunked

yep, some run out the heater core to the radiator.

Edit- found a pic of my gen 6 configuration

View attachment 343776

So does that mean the hose behind the chain, on the top left, is 5/8" and goes to the inlet of the heater core? Just making sure before I order the parts.

 

[skunked]

@skunked




So does that mean the hose behind the chain, on the top left, is 5/8" and goes to the inlet of the heater core? Just making sure before I order the parts.

yes

 

[wheels87k5]

@Larry, @Capt Ron,@ZooMad75

How do you set up the A/C to match up to the K5?

The Accumulator is different between the two.

1. On the K5 the pressure cut-off switch is on the accumulator. On the 454 Vortec, I believe the switch is at the junction that attaches to the top of the compressor.

2. The hose connection, on the K5 accumulator, does not match the 7.4 hose. Will the 7.4 accumulator work with the K5 evaporator?

 

[Capt Ron]

@Larry, @Capt Ron,@ZooMad75

How do you set up the A/C to match up to the K5?

The Accumulator is different between the two.

1. On the K5 the pressure cut-off switch is on the accumulator. On the 454 Vortec, I believe the switch is at the junction that attaches to the top of the compressor.

2. The hose connection, on the K5 accumulator, does not match the 7.4 hose. Will the 7.4 accumulator work with the K5 evaporator?

I just used a new stock accumulator and orifice tube. Also used stock cut off switch, the one on the ac compressor is not hooked up to anything. I custom built the lines with a combination of stock 77 lines and the l-29 ac lines, a little bit of aluminum welding and was good to go. 38% at the vents.
EDIT: I know next to nothing about ac systems but this setup seems to work great.

 

[wheels87k5]

I was hoping the wiring wasn't that big of an issue. But I will need to have my a/c hoses custom made because the hose that comes off the compressor is to large for the accumulator. Did you use the stock condenser?

@ZooMad75 @Larry
Did you have your a/c hoses custom made or find an accumulator that worked?

 

[ZooMad75]

I'm going to be headed down this road for a/c soon. But I'm probably going 100% aftermarket since my truck wasn't built with a/c.

But I think Larry did something similar to what Ron did. You need the hose manifold off of the L29 setup and then mate them up with the stock squarebody system. Our local Napa crimped up Larry's for him.

I'm going to have to get a similar manifold/hose set for my compressor to match up to whatever system I decide to use.

 

[Capt Ron]

Did you use the stock condenser?

Yes but I would recommend updating to a parallel flow condenser while you have everything apart.
Subsequent research has shown better results with one. At the very least if your system has been left exposed to the elements, install a a new stock condenser. My system was complete and clean. And do some research on PAG oil.

 

[wheels87k5]

I'm going to be headed down this road for a/c soon. But I'm probably going 100% aftermarket since my truck wasn't built with a/c.

But I think Larry did something similar to what Ron did. You need the hose manifold off of the L29 setup and then mate them up with the stock squarebody system. Our local Napa crimped up Larry's for him.

I'm going to have to get a similar manifold/hose set for my compressor to match up to whatever system I decide to use.

That's what I was thinking. Having to get my hoses custom made. Not a big deal. Now to find the place to make them.

Yes but I would recommend updating to a parallel flow condenser while you have everything apart.
Subsequent research has shown better results with one. At the very least if your system has been left exposed to the elements, install a a new stock condenser. My system was complete and clean. And do some research on PAG oil.

This is the condenser I am plan on using. https://www.ebay.com/itm/153999179909?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649. Should work great. I'll end up vacuuming out the system and using the correct PAG oil.

I'm going to move more questions to my build thread.