Do you need heater core to fill with coolant?
Bruce, it actually does matter, depending on the way the heater core is mounted in the housing, you’ll want the heater core to fill with hot coolant to get the most heat in the cabin, otherwise, the heater core will have little pressure or coolant to do it’s job. Click to expand… And different size hoses prevents connecting the core up wrong.
Why are there two different sizes of heater hoses?
There are two different sizes so that the people assembling the cars couldn’t screw up the installation — same with us. If you install big to big and small to small, the flow direction doesn’t matter, does it?
Why did my water heater blow out the seams?
As a result my high volume water pump supplied so much pressure that it blew out the seams on the heater core because the return line was restricted by using a smaller hose. This has happened on 3 different occasions, all at high RPMS.
Which is larger a return hose or a feed hose?
It seems I made a very common mistake by running the 5/8″ hose from the water pump and 3/4″ hose from the intake. I think the return line should be larger than the feed line simply; with the same Volume of a smaller hose will have higher pressure and a larger (return) hose will have lower pressure.
Where does the coolant go after flushing out the heater core?
The inlet hose may have a heater control valve which regulates the amount of coolant flowing into the heater core. The outlet hose will typically run straight to the radiator or cooling system reservoir to return the coolant after flowing through the heater core.
What should I do if my heater core comes out?
Take care not to damage outlet port or you will have to replace the whole heater core. If the hose is old and caked onto the outlet port, you may have to replace the hose as removing it will likely damage the seal. Liquid will most likely come out as well so have the rags ready to clean up any spilled coolant. Step 3: Attach garden hose to outlet.
Why is the inlet hose warmer than the heater core?
The inlet hose will be warmer as it is feeding hot coolant into the heater core which then warms the air up going into the cabin. Step 4: Make sure the engine is cold. Make sure the engine has sat for a few hours so the coolant isn’t too hot.
Can a garden hose rupture a heater core?
Most heater cores can only handle about 10 psi of pressure whereas the typical garden hose can supply around 40 psi. Turning the flow up too high can rupture the heater core and then you’ll need to replace the whole unit. Step 2: Keep flushing until the water coming out is clear.