massacre
Elite Explorer
- Joined
- January 24, 2018
- Messages
- 1,007
- Reaction score
- 278
- City, State
- Massachusetts
- Year, Model & Trim Level
- ‘94 Explorer
‘19 Nautilus
Hello, I have been searching the threads here, and I think I might need to ask a question-
I replaced radiator, water pump, heads, new rad hoses a year or two ago. Also installed a new stant thermostat, new temp sensors.
Temp gauge always read low after this, but the heat was still hot.
Noticed reduced airflow from the blower motor, so I cleaned out the heater box which was plugged with pine needles/mouse nest debris/leaves. Vacuumed out the crap, blew the heater core out with compressed air and put everything back together.
That resulted in a huge improvement in airflow through the vents, and a slight improvement in how hot the heat is, but it’s still not as hot as it should be. Coolant is 50/50 mix and no leaks. Level is good.
I grounded the gauge and the gauge is working correctly. The hoses do get hot. Not sure exactly how hot, but they are definitely not cold.
I am having a hard time figuring out if the heater control valve is working properly.
The vacuum hose that attaches to the heater control valve, seems to go to the part of the intake tract that attaches to the intake airbox, and also is attached to the heat riser from the exhaust manifold on the passenger side front.
I never reinstalled the heat riser when I put everything back together. I put vacuum to the HCV side of that hose and it doesn’t leak.
So my question is- does that heat riser part of the intake apply vacuum to the HCV? Is this to keep the coolant circulating through the engine to prevent cold air from being blown into the cabin until the engine is warm?
I would like to replace the heater core, since it is original and the truck has about 100k miles. I tried to blow out as much of the heater core as I could through the heater box, but I suspect that it might be blocked with dirt/dust on the airflow side. These heater cores seem really easy to replace compared to other heater cores I have replaced. While I’m doing that I figure replacing the HCV is a good idea.
Will also replace the thermostat since the gauge is reading low.
My concern is that I don’t want to replace these parts and end up back where I am now.
Plan is to remove the cover to the heater core and see if the heater core is actually getting hot or not.
Is the lack of the heat riser causing my issue?
Any advice would be greatly appreciated
Thanks!
I replaced radiator, water pump, heads, new rad hoses a year or two ago. Also installed a new stant thermostat, new temp sensors.
Temp gauge always read low after this, but the heat was still hot.
Noticed reduced airflow from the blower motor, so I cleaned out the heater box which was plugged with pine needles/mouse nest debris/leaves. Vacuumed out the crap, blew the heater core out with compressed air and put everything back together.
That resulted in a huge improvement in airflow through the vents, and a slight improvement in how hot the heat is, but it’s still not as hot as it should be. Coolant is 50/50 mix and no leaks. Level is good.
I grounded the gauge and the gauge is working correctly. The hoses do get hot. Not sure exactly how hot, but they are definitely not cold.
I am having a hard time figuring out if the heater control valve is working properly.
The vacuum hose that attaches to the heater control valve, seems to go to the part of the intake tract that attaches to the intake airbox, and also is attached to the heat riser from the exhaust manifold on the passenger side front.
I never reinstalled the heat riser when I put everything back together. I put vacuum to the HCV side of that hose and it doesn’t leak.
So my question is- does that heat riser part of the intake apply vacuum to the HCV? Is this to keep the coolant circulating through the engine to prevent cold air from being blown into the cabin until the engine is warm?
I would like to replace the heater core, since it is original and the truck has about 100k miles. I tried to blow out as much of the heater core as I could through the heater box, but I suspect that it might be blocked with dirt/dust on the airflow side. These heater cores seem really easy to replace compared to other heater cores I have replaced. While I’m doing that I figure replacing the HCV is a good idea.
Will also replace the thermostat since the gauge is reading low.
My concern is that I don’t want to replace these parts and end up back where I am now.
Plan is to remove the cover to the heater core and see if the heater core is actually getting hot or not.
Is the lack of the heat riser causing my issue?
Any advice would be greatly appreciated
Thanks!