Toyota Prius Engine Coolant Bleeding Part 2: Burp Trapped Air Pockets Heater Core ICE Cooling System

Описание: This is the second part in a 2-part series showing how to bleed the ICE engine coolant in Prius Gen II. Here are the #ᴬᴰlinks to tools, parts and accessories you may need to perform this repair:

1. https://amzn.to/41ylf2a | Klein Tools 69149P Electrical Test Kit with Digital Multimeter, Non-Contact Voltage Tester and Electrical Outlet Tester, Leads and Batteries
2. https://amzn.to/41nywdW | Zerex Asian Vehicle Red Silicate and Borate Free 50/50 Prediluted Ready-to-Use
3. https://amzn.to/3ZFMyXd | PEAK OET Extended Life Red/Pink 50/50 Prediluted Antifreeze/Coolant for Asian Vehicles, 1 Gallon

Or Click on Amazon link here and search for what you need: https://amzn.to/3D1T2GQ

If you haven't watched Part 1 yet (Burping / Getting Rid Of Trapped Air in Coolant Heat Recovery System Tank Canister), please watch it here:    • Prius Coolant Bleeding Part 1: How To Burp...  

This video is for Toyota Prius Gen II I4 1.5L Hybrid Synergy Drive. Second generation Prius model years are 2004, 2005, 2006, 2007, 2008 & 2009. Bleeding or burping on other generations Prius might be different.

When you drain the coolant, whether for scheduled maintenance or if you have had to replace components such as radiator, hoses and pumps, refilling the coolant is only the initial stage of a complicated process. The next step is to bleed or burp the cooling system to get rid of the present of the air pockets.

"Burping" the cooling system in your Toyota refers to bleeding the cooling system and is necessary if air has entered the system. Air in the cooling system causes hot spots and subsequently overheating and serious engine damage. Failure to bleed trapped air will result in the dreaded triangle of death followed by temperature icon on the instrument cluster and dashboard display. There might, however, not be any CEL or error codes.

Other than the triangle of death icon followed by temperature icon, symptoms of air bubbles in the system are as follows: When you turned the car on, and/or while driving you can hear the sound of water travelling in the engine compartment into the heater core inside the cabin. You'll hear "gurgling" , "wooshing", or "swishing" sound coming from the middle of the dashboard inside the car, which means there's trapped air inside the heater core.

Burping or bleeding trapped air is rather complicated because Generation 2 Toyota Prius Internal Combustion Engine (ICE) cooling system has a Coolant Heat Recovery Storage Tank Canister (CHRS). So before you can get ride of air inside the heater core, you must first get rid of the air inside the CHRS.

After CHRS has been bled, the next step is to remove trapped air (or air pockets) inside the heater core. This process involved turning the engine car on without driving it (putting in in test / maintenance / inspection / diagnostic mode), revving the RPM to 3000, turning the heat to max allows the radiator fluid to circulate through the cooling system to ensure that all air bubbles are eliminated from the system. Remove the radiator cap, insert a large funnel into the neck and the fill with coolant. After the engine has reached operating temperature and the thermostat opens, open the bleeder valve and squeeze the upper and lower radiator hoses. This is what this video is all about. In this video Aiman also showed how to do it even if you have an aftermarket radiator (with different style bleeder valve) as opposed to the genuine OEM one.

In order to bleed the air out of heater core, you will need to idle the engine / keep the engine running continuously. We have a separate video on how to to do that:    • How To Put A Prius Into Maintenance | Acti...   (How To Put Prius Gen II in Maintenance or Inspection Mode).

Keep in mind that the Internal Combustion Engine (ICE) cooling system is separate and independent of the hybrid inverter cooling system, and if you want to know how to bleed the inverter coolant, check out our video here:    • How To Bleed INVERTER Coolant System Toyot...  

Here's the complete playlist of our Prius Gen 2:    • Toyota Prius Auto Repair & DIY How-To Vide...  

Thanks for watching, please check our other DIY auto repair tutorial & guide videos on EyeOnAiman's channel. Other cars Aiman have worked on includes Honda Accord, Civic, Insight, CR-V, Hyundai Santa Fe, Elantra and Toyota Prius Hybrid.

Obviously, Aiman's auto repair videos are mostly designed for entertainment purposes. Aiman is not a professional and not a certified ASE mechanic. The videos should always be used only as a guide.

You can watch all of Aiman's auto repair videos in the following playlist:    • How To Remove Alternator Hyundai Sonata 6t...  

This video is presented to you by Aiman-Imran Anuar. You can watch more of#Gen2Prius and #Aiman_DIY_Auto_Repair videos on #EyeOnAiman Youtube Channel & Facebook Page.

Recording Date: November 29, 2018
Video URL:    • Toyota Prius Engine Coolant Bleeding Part ...