Making heater blow hotter?

[4wdEconoBox]

Yes sir irowiki! Just got finished cleaning it out as a matter of fact!

That right there is why I should never touch rtv silicon Bailey... I put to much on water pumps and such and it breaks off and gets stuck in places it shouldn't.... Just getting that mess out should help soooo much!!!

[Gottolovem]

If you are running with no thermostat in the car,the heater will never run very hot.

[dlb]

that looks like the remains of some kind of seal to me.

[4wdEconoBox]

Nah its got a thermostat haha.

And that's pretty much what it is, blue rtv silicon is what it is though haha

[4wdEconoBox]

So I got everything back together and the heat from the heater definitely feels hotter and there send to be much more airflow after taking the evap out. She still seems be running hotter than I'm used to, maybe I just need to live with it haha...

This is where the temp gauge stays at if I'm not driving, but when I'm driving up a hill and I stay in the throttle, it can reach up to the top of that drawing and it scares the crap out of be every time haha

[marlinh]

Does it go right up to hot or just above the thermometer?

[4wdEconoBox]

It's never went any higher than the thermometer, but it just scares me, ya know?

[irowiki]

I'd wager on a bad thermostat or plugged radiator.

[BaileySims]

I'd wager on a bad thermostat or plugged radiator.

True. If all that silicon you got out of the heater core, some could be in the rad too?

[4wdEconoBox]

Yeah, I planned on flushing everything this weekend, I'm gonna remove the thermostat, bolt the housing back up, and hook my rig up to the heater core hose, and let it run through the lower radiator hose that way it flushes the whole system a few times and see what happens. I may even flush the radiator separately after I flush the rest of the system... Would that be the best way to do it?

[Petros]

that is a fairly normal range of proper temperature, from the bottom to the top of the thermometer graphic.

However, when it is at the high end and it comes down rapidly when you turn on the heater full, it means the radiator has limited capacity. Meaning it is partially blocked, or full of gunk or scale. A good reverse flush after a vinegar soak should clean it out.

[irowiki]

I would not put much faith in a radiator flush (I speak from experience)

[Petros]

I would not put much faith in a radiator flush (I speak from experience)

the chimerical flush products are almost worthless. I take the radiator out and lay it flat, plug the outlets and fill with white vinegar for about 45 min or more, than attached a hose to goes to my faucet and turn it on full blast. sometimes I collect the out flow in a bucket to inspect when I get out of it. If you get stuff that looks like white corn flakes, it means there was heavy scale, if you get metal shavings it means a failed water pump filled it with debris (the reason it should be flushed backwards, to dislodge the larger particals that went into the inlet side).

I have also used Hydrocloric acid for really tough scale, but that is very risky since it could eat through good metal as well, so limit the time to 10 to 15 min.

Both of these methods I have used successfully on both scaled up radiators and heater cores.

If the radiator is full of corrosion either of these could corrode new holes in it, but I figure if the remaining metal is that thin, it was not long from failing anyway. And it is time for a new radiator.

[ARCHINSTL]

Vinegar from 2014:
viewtopic.php?f=7&t=10496&hilit=vinegar
I planned on doing it again when doing the timing belt last Summer, but fractured femur laid me up - and with no garage and the rain we got this Fall - 2016 will be the year.
This time I will heat the vinegar to boiling that should promote descaling - never thought of it in 2014. Will also run it through the heater core this time.
Tom M.

[4wdEconoBox]

Well I'm not super worried about any kind of deposits or anything. The engine was rebuild and hot tanked and cleaned out good in June or July of 2015 and the radiator was purchased brand new at the end of July last year, and I've only ran good antifreeze in it since then. So there shouldn't be many, if any kind of deposits. I was mainly just wanting to make sure that there wasn't any debris such a silicon, like what was in the heater core. Thanks for all of the suggestions though guys!!

Edit: I wasn't going to really do a chemical flush, I might add some vinegar to the radiator, start up the car and let it warm up for a minute or two, then empty it, and backflush the whole system with water, or at least that was the plan anyway haha.