Diesel mechanic in Puyallup
Replacing the heater core in Peterbilt 579
We have a 2014 Peterbilt 579 that we are changing out the heater core. Typically, when they are leaking, you will get water on your passenger side floor. Also, your windows will fog up. |
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So, what you got to do to get to it get it out, and then you just put it back together in the same way you took apart only in reverse. So, you have that panel that goes right here underneath where the box is and behind a kick panel. The panel pulls out you have a couple of screws. So, to pull that panel off, undo the screws pull that panel off, and then you have a little cover that is bolted on to the duct-work for the vents. There is a torque screw that holds that panel in it’s a number 20 torque bit.
If you go to the diesel engine compartment of the truck once you have the hoses unhooked, you will see the two ends of the heater core sticking out. To get to that point, take a pair of vice grips and clamp off both of the heater hoses, so you don’t lose water and antifreeze. Once that is done, loosen the hose clamps on both lines and move them down the hose out of the way. Sometimes there is the kind of hose clamps that you squeeze the two ends together to make them bigger and slide those down the hose out of the way. Most diesel mechanics Tacoma don't like those types of clamps because they are a pain to work with and don’t seem to tighten as well as the ones with screws.
Now that your hoses are off, you can use the quick connects to take off the splitter that is connected to your heater core inlets. This is the splitter that connects the heater core to the heater hoses. With this piece off, you can gently tap on the old heater core inlets with your hand or vice grips until they are flush with the firewall. Now walk around to the interior of the truck and pull the bad heater core out.
When sliding your new heater core into the heater core holder, make sure it’s facing the correct way, or the holes won’t line up. Don’t force it in there if it doesn’t slide in easy just pull it out and flip it around, and then it should slide in easily. After that, we recommend hooking the hoses back up to the heater core and tightening the hose clamps.
Start the truck and let it warm up while you are checking for leaks. Once you determine there are no leaks, you can put your cover over the heater core slot and put your kick panel back on. We like to make sure there are no leaks before putting that kick panel back on; otherwise, you will be taking it off again if something is not connected properly, and no one wants to do this work twice.
So if you think you need mobile diesel repair in Tacoma, give Tacoma Heavy Equipment Repair a call at 253-289-3748.
If you go to the diesel engine compartment of the truck once you have the hoses unhooked, you will see the two ends of the heater core sticking out. To get to that point, take a pair of vice grips and clamp off both of the heater hoses, so you don’t lose water and antifreeze. Once that is done, loosen the hose clamps on both lines and move them down the hose out of the way. Sometimes there is the kind of hose clamps that you squeeze the two ends together to make them bigger and slide those down the hose out of the way. Most diesel mechanics Tacoma don't like those types of clamps because they are a pain to work with and don’t seem to tighten as well as the ones with screws.
Now that your hoses are off, you can use the quick connects to take off the splitter that is connected to your heater core inlets. This is the splitter that connects the heater core to the heater hoses. With this piece off, you can gently tap on the old heater core inlets with your hand or vice grips until they are flush with the firewall. Now walk around to the interior of the truck and pull the bad heater core out.
When sliding your new heater core into the heater core holder, make sure it’s facing the correct way, or the holes won’t line up. Don’t force it in there if it doesn’t slide in easy just pull it out and flip it around, and then it should slide in easily. After that, we recommend hooking the hoses back up to the heater core and tightening the hose clamps.
Start the truck and let it warm up while you are checking for leaks. Once you determine there are no leaks, you can put your cover over the heater core slot and put your kick panel back on. We like to make sure there are no leaks before putting that kick panel back on; otherwise, you will be taking it off again if something is not connected properly, and no one wants to do this work twice.
So if you think you need mobile diesel repair in Tacoma, give Tacoma Heavy Equipment Repair a call at 253-289-3748.