#11 in Automotive air conditioning products
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Reddit mentions of ACDelco 15-5557 GM Original Equipment Heater Bypass Valve
Sentiment score: 1
Reddit mentions: 1
We found 1 Reddit mentions of ACDelco 15-5557 GM Original Equipment Heater Bypass Valve. Here are the top ones.
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- Restore cooling system function and performance
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
Features:
Specs:
| Height | 5.3 Inches |
| Length | 7.9 Inches |
| Number of items | 1 |
| Weight | 0.34 Pounds |
| Width | 5.3 Inches |
I'll find some pics for reference. There are two coolant hoses running up the floor to the heater core--one bringing fluid into the core, and one return line. The core wires can be unplugged and then unbolted from the floor.
Basically there's two ways to bypass it. You can unclamp the hoses from below and fashion some type of u-shape tube to so it simply returns to the rest of the cooling system. I found some premade u tube, but the hoses into the heater core are actually slightly different sizes.
Another way is to bypass it further upstream, where there is a heater valve. With rear heat it has 6 places to plug in tubes. The version for non-rear heat has only 4 tubes, like this: https://www.amazon.com/dp/B000C9DDN0/_encoding=UTF8?coliid=I15VEQASFOWQ4V&colid=2EMFY9IJP51LI .
I didnt want to mess with that though. Be sure the engine is cool, and probably drain the coolant first. I thought i could quickly unclamp and put in the U piece in and got pretty soaked with coolant. Check the astrosafari forum for better details than i could give.