dual pass plumbing
03-31-2013, 10:10 AM
#1
dual pass plumbing
Ok so I took yesterday to reroute my hoses to the gm verison of dual pass and now when I take the filler cap off the coolant shots out! So what did a **** up now? lol
aka what would cause the pressure to rise and push the coolant out like that.
aka what would cause the pressure to rise and push the coolant out like that.
03-31-2013, 10:27 AM
#3
Its doing it out of the cap on my stealth h/e, im hooked up the opt b but i dont have the bleeder line ran yet because i got to go to the shop n have them weld in the opt b bung my h/e did come with one.
It was doing this before I added the hose for opt b also so its something wrong with the gm route plumbing I guess.
It was doing this before I added the hose for opt b also so its something wrong with the gm route plumbing I guess.
Last edited by Vander Nars; 03-31-2013 at 10:40 AM.
03-31-2013, 10:29 AM
#4
Matter of fact with the car off, if i open my cap on the stealth h/e the coolant just slowly drains out the top but that only happen after adding opt b where it will just drain out the top. Before i added the opt b hose it didnt drain out the cap but the coolant was flowing so fast it would plus out the top when it was on.
Last edited by Vander Nars; 03-31-2013 at 11:12 AM.
03-31-2013, 11:21 AM
#5
Put the bleed line in and that will help. Look for kinks in your hoses. The pressure builds up with the temp of the intercooler coolant so also check to make sure your pump is working
03-31-2013, 11:41 AM
#6
No kinks in the hoses, like i said my coolant started to flow really fast after i followed their chart, it was pushing it out of the filler neck some what because of how fast it was flowing. As far as i know that aint how its suppose to work.
Last edited by Vander Nars; 04-01-2013 at 12:43 AM.
03-09-2015, 09:47 PM
#11
Stock routing
Sorry this is still a mystery for me after looking at so many posts My stock hose comes out of the upper bung of the endplate thru the filler neck and into the stock heat exchanger - not into the pump. Out of the stock heat exchanger into the pump. Out of the pump into the lower bung on the endplate. It seems better for the pump to send the hot water from the outlet of the endplate thru the heat exchanger then into the pump.
When adding the dual pass endplate it seems simpler to lengthen the pump out hose to reach the new center bung on the endplate. The top and bottom bungs of the dual pass endplate get tee"d together and attached to the filler. The outlet of the filler neck is unchanged and goes to the input of the heat exchanger. The outlet hose of the heat exchanger is also unchanged and goes to the inlet of the pump.
I attached the only diagram I could find that is true to how my stock hoses are routed. I would need to modify all hoses if I follow the typical instructions.
When adding the dual pass endplate it seems simpler to lengthen the pump out hose to reach the new center bung on the endplate. The top and bottom bungs of the dual pass endplate get tee"d together and attached to the filler. The outlet of the filler neck is unchanged and goes to the input of the heat exchanger. The outlet hose of the heat exchanger is also unchanged and goes to the inlet of the pump.
I attached the only diagram I could find that is true to how my stock hoses are routed. I would need to modify all hoses if I follow the typical instructions.
03-10-2015, 08:07 AM
#13
I did see your procedure and did remove that bolt without removing the alternator. I didnt see the details about the hose connection changes. I am not installing option B but it seems the same question applies when I look at those hose diagrams everyone has posted. Why does the hose that exits the dual pass get rerouted from the input of the heat exchanger to the input of the pump? My stock hose exits the endplate and goes to the input of the heat exchanger. I attached that pdf showing the stock routing.
03-10-2015, 08:15 AM
#14
I did see your procedure and did remove that bolt without removing the alternator. I didnt see the details about the hose connection changes. I am not installing option B but it seems the same question applies when I look at those hose diagrams everyone has posted. Why does the hose that exits the dual pass get rerouted from the input of the heat exchanger to the input of the pump? My stock hose exits the endplate and goes to the input of the heat exchanger. I attached that pdf showing the stock routing.
The hose routing is all based from the GM diagrams for dual pass installation. The dual pass functions different from your stock endplate thus the need for the routing shown in the diagrams, and my thread. You can't expect to hook it up the same. The coolant flows through the manifold differently than stock as well.
03-10-2015, 02:09 PM
#15
I understand the flow thru the cores change to center bung in and top and bottom out but not understanding the changes to the pump in & out. My stock endplate out hose goes to the aftercooler in not the pump in. The output of my aftercooler goes to the input of my pump not the endplate in. Really its just a matter of whether the hot water from the endplate gets cooled thru the aftercooler before it enters the pump. I will maintain the original GM hose method and simply tee the two endplate bungs out. The output hose from the pump needs to be entended slightly to reach the center bung. Simple and only requires about 1ft of hose.
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