No heat !!!

[jimmyz32]

Ok I changed my degas bottle to the new style. My heads were
Done about 3 months ago so it is not the heads. I am not loosing
Coolant at all. Does not over heat at all. My coolant is Cat ELC coolant
I turn on the heat and the input side of the heater gets hot but the
Output side stays cold unless u get on the skinny pedal a few times
Then it will heat up and stay hot. When driving it only gets Luke warm.
I was wondering if it could be the thermostat or water pump because they are the only things I have not replaced on the truck.
They don't cost much so I am doing them this weekend just want to see if I am in the right direction. Thanks

[Njstroker91]

Do you have a monitor you can save yourself a few bucks bucks by checking your temps and that will show if your thermostat is shot. I'm thinking it is more heater core related.


Sent from AutoGuide.com App

[jimmyz32]

I am buying a ect gauge and a eot gauge this month.

[Njstroker91]

Yeah I hear ya if you turn on the heat there are the too heater core house one has a valve one that's controlled by vaccum. If you grab them careful when up to temp is one way hotter then the other? I would think if the heater core has a restriction in it the one hose returning to the engine would be colder then the other. I know my heat will burn me outta the can at about 150 degrees


Sent from AutoGuide.com App

[DieselManor]

How many miles were on the coolant system between changes? It sounds like a clogged heater core to me. You might want to drain the coolant in clean containers (to re-use it) and do a flush. The Fleetguard Restore and Restore Plus work very well for this and aren't too harsh on the gaskets and seals. If you need a good write-up on how to do this shoot me an email and I'll get you the info. You can find some info on these cleaners below.

Fleetguard CC2638 Restore Plus Coolant System Cleaner at DieselManor
Fleetguard CC2610 Restore Coolant System Cleaner at DieselManor

[risco]

my truck has the same problem i figured out. from some reason on all the setting on the right side of 12 oclock (off)postion the a/c compressior runs i can here it turn on and off and the line is ice cold. the only way i have found to turn the compressor off is the frist setting on left side 11 oclock postion.

[jimmyz32]

I had blown head gaskets when I bought the truck. The guy I bought it from said he did the gaskets 2 years before I bought it so about 4 years ago. I do need to flush it again though because the elc coolant looks like a rusty mud color.

[jimmyz32]

I guess all the crap in the system settles in the heater core. Can I back flush the core or just replace it?

[Joeshu1000]

If you think it's plugged I would just replace it. I checked Rockauto and the heater core is relatively inexpensive. I will say that I just replaced my head gaskets, which were blown, and I had the same heating issues and now that they're fixed it's gone away.

[jwsland]

I just put a new napa coolant bottle on, the cap went on kinda funny, only grabbing a few threads before it clicked and I immediatly noticed I had no heat after that bottle/cap went on. Got a new cap that screwed down tight now my heat works.