Help with expansion tank
I’ve installed a coolant overflow/expansion tank supposedly made for LS1 engine swaps. I’m a bit confused on the radiator caps and actual hose routing. I’ve followed the attached diagram below, along with another diagram showing how I routed my hoses based on the expansion tank barbs, aftermarket radiator barbs and Vintage Air system I installed. I idled the engine as a quick test with the caps off for now, and idling it’s sitting around 185 degrees with the fan popping on low speed around 190 degrees . I’m not sure if I need pressurized cap on both tanks or just 1. Are there any issues with the way the hoses are run?
https://i.postimg.cc/L5wvXtMJ/F861-C...09-B890065.jpg https://i.postimg.cc/WzTq7t65/4-B888...38654934-F.jpg |
Re: Help with expansion tank
On my LS swaps I just run a basic over flow tank from Speedway. It's not pressurized. I run a 15 lb radiator cap.
|
Re: Help with expansion tank
I also just ran a plastic oem overfow tank from rad to tank with a rubber hose. No issues in Houston at all.
|
Re: Help with expansion tank
Count me in with the others. Just a basic overflow tank and an 18 lb. cap. I did have one of those small stainless versions and it was always either empty or overflowing. I put a normal size on and it works great.
|
Re: Help with expansion tank
looking at your hand drawn diagram. I don't know much about vintage air BUT you show a crossover pipe and a shut off valve that then results in the heater hose flowing thru your overflow tank. If you have it set up this way then i think you need a pressure tank. I think you can get rid of the tee and let it flow back into the engine. My set up doesn't have but a heater hose in and one out no shut off or tees. I think vintage air is doing this because they want the hot antifreeze not to run through the heater core while the ac is cooling. I am in the process of completing my ac system using original parts so I may end up doing what you did if the coolant is stopping me from getting cold a/c.
|
Re: Help with expansion tank
Quote:
|
Re: Help with expansion tank
I just relooked at the install instructions and don't see anything in regards to the use of a TEE ....??
https://www.vintageair.com/instructions_pdf/751170.pdf |
Re: Help with expansion tank
Quote:
I did not put a tee in front of the VA shut off valve and mine works fine. |
Re: Help with expansion tank
Quote:
On my 5 series bmw LS1 swap, at a long stop light or going through a drive through, I could watch the aftermarket coolant temp gauge start to rise, when I turn on the heater (not even, it opens the water valve and lets coolant flow in the heater core. almost instantly, the coolant temp dropped. I could blip the throttle some and it would also cool it down... Since I havnt installed the cross over tube, I just leave 1 valve open so the flow is like factory. |
All times are GMT -4. The time now is 05:41 PM. |
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com