HVAC heat blows warm/hot on drivers side, cool/cold passenger side (warranty issue)

[Eggman]

Penray 200264 RTO Cooling System Cleaner

200264 RTO Cooling System Cleaner



Penray 200264 RTO Cooling System Cleaner is specially formulated to remove oil, hydraulic and transmission fluid from heavy duty cooling systems. It disperses dropout, and helps remove silicate gel, scale, build-up and other deposits. Requires less flushing than other cleaners, Penray RTO Cooling System Cleaner will not harm seals and metals.
Removes The Oil Cooling System Cleaner
Specialized cleaner removes oil, hydraulic and transmission fluid from the cooling system
Removes dropout, silicate gel, scale buildup and other deposits
Low suds detergent flushes easily from system with 1-2 rinses
Safe for seals and metals
Safe for use with all coolant formulations
Compatible with conventional & ELC coolants
Nitrite free

Use ½ bottle for light contamination and entire bottle for heavy oil residue.

Emphasis added.


Penray 200264 RTO Cooling System Cleaner Tech Bulletin is attached.

[Top_Fuel]

I wonder if you could isolate the heater core and just continually pump this stuff through the core over a long period of time. Sort of like what this guy is doing...

[Eggman]

I wonder if you could isolate the heater core and just continually pump this stuff through the core over a long period of time. Sort of like what this guy is doing...

I was thinking the same thing except:

1. The two cleaning products I posted that address silicate gel recommend heat to do their work, and
2. I would fully expect that if the silicate gel is found in the heater, it will be found elsewhere.

[Top_Fuel]

The two cleaning products I posted that address silicate gel recommend heat to do their work...

Yeah...guess that rules out circulating the stuff through the heater core at room temperature!

[Eggman]

Yeah...guess that rules out circulating the stuff through the heater core at room temperature!

That would sure save some headache!

I wonder - are there coolant flushing machines that heat the solution?

The ones here don't mention heat:
Best Buy Auto Equipment - Coolant Flush and Fill Machines
Wynn's Coolant Fluid Exchange Machine

[Wallythacker]

That would sure save some headache!

I wonder - are there coolant flushing machines that heat the solution?

The ones here don't mention heat:
Best Buy Auto Equipment - Coolant Flush and Fill Machines
Wynn's Coolant Fluid Exchange Machine

there's no problem .just put an inline block heater into the mix. heated solution abounds. matter of fact, they pump too. all in 1 solution then,

[Eggman]

there's no problem .just put an inline block heater into the mix. heated solution abounds. matter of fact, they pump too. all in 1 solution then,

Interesting. Can you give an example of the equipment you would recommend?

[Eggman]

Prestone Radiator Flush & Oil Degreaser

Prestone Radiator Flush & Oil Degreaser
Performance Chemicals PN: AS110Y


Overview

Introducing Prestone’s NEW Radiator Flush & Oil Degreaser. An innovative and easy to use cooling system cleaner for the most contaminated systems. Just one use helps prevent overheating, a major cause of engine failure. Perfect for blown head gaskets!.

Part 1 is an acid cleaner that dissolves corrosion and scale without damaging metals.

Part 2 is an oil encapsulation system that strips grease and oil from all surfaces and flushes it away.

Features & Benefits:
Performance:

• Eliminate oil & fuel contamination.
• Strip away corrosion by product from metal surfaces.
• Remove aluminum corrosion, silicate gel, and rust.
• Restores cabin heat.
• Fast and easy to use.

Safe for all:

• Antifreeze/Coolants.
• Metals.
• Gaskets.
• Hoses.
• Plastics.

---

Instructions

1. Drain cooling system, add Flush & Oil Degreaser and refill with water. (Systems larger than 16 qts may require 2nd bottle.).
2. Bring the engine up to operating temperature and ensure circulation through the entire cooling system for 45-60 minutes. Systems that are especially contaminated can run up to 3 hours.
3. Thoroughly flush the cooling system with water.
4. Drain the cooling system and install half the cooling system capacity with Prestone Antifreeze/Coolant, top off with water and thoroughly mix by driving.
5. Verify the coolant concentration and level and topoff as necessary.

Do not reuse container. Keep container closed. Dispose of according to federal, state, or local regulations.

Perfect for blown head gaskets?!? What - before, or after?

[AtomicPunk]

Prestone Radiator Flush & Oil Degreaser


Perfect for blown head gaskets?!? What - before, or after?

After, as the failed head gasket would allow mix of oil/coolant in the water jackets...unless you were trying to be funny, then "LOL".

[Top_Fuel]

Hmmm...tempted to buy some of that just to see what it will dissolve. I wonder if it would dissolve something like grease or Vaseline?

I think they are suggesting you would use this after a blown head gasket because this is when the coolant would potentially become contaminated with engine oil.