Buy Porsche Cayenne Engine Coolant / Antifreezes

Engine coolant is a special liquid that carries heat away from the engine so it doesn't over-heat or freeze in cold weather, keeping parts at a safe 80-90 °C (176-194 °F) operating range. coolant definition (Wikipedia) It also fights rust and lubricates the water pump. (Wikipedia)

Porsche fills every Cayenne with a pink Hybrid-Organic-Acid-Technology (HOAT) coolant known as G40. (eEuroparts) The most common Porsche part number is 000 043 301 05, and it can also appear as 301 49 or 305 75 on later bottles. (O'Reilly Auto Parts) This HOAT blend is phosphate- and nitrate-free, which protects the Cayenne's aluminum blocks and radiators. (rennlist.com)

Full system capacity varies by engine:

• 4.8 L V8 Turbo & GTS-about 18-21 liters (19-22 qt). (amsoil.ca)
• 3.6 L V6-typically 13-16 liters, depending on two- or four-zone HVAC. (rennlist.com)
  Always fill until the "MAX" line on the expansion tank when the engine is cold. (ManualsLib)

Porsche and most experts call for a 50/50 mix of concentrate and clean distilled or de-ionized water. (Bob Is The Oil Guy, American Dream Auto Protect)

• Freeze protection: about -33 °F (-36 °C). (O'Reilly Auto Parts)
• Boil-over protection: roughly +250 °F (+121 °C).
  A stronger mix than 60 % coolant actually raises the freezing point and can cause overheating. (Motor Repair Stack Exchange)

Porsche's service schedule recommends replacing the coolant every 40 000 miles (≈64 000 km) or every 4 years, whichever comes first. (porschefremont.com) Long-life inhibitors break down over time, so fresh fluid keeps corrosion at bay. (Wikipedia)

1. Park on level ground and let the engine cool. (ManualsLib)
2. Verify the expansion-tank fluid sits between "MIN" and "MAX."
3. If the red temperature light or gauge passes the middle mark, pull over-the car is overheating. (CarParts)

Open the cap slowly to release pressure. Add pre-mixed 50/50 HOAT coolant until the level reaches "MAX," then re-fit the cap tightly. (ManualsLib)

• Drain the old fluid via the lower radiator hose.
• Re-fit hose, fill with new mix, and squeeze upper hoses to push trapped air. (rennlist.com)
• Start the engine, set heater to HOT, idle until warm, topping off as bubbles escape.
• Many DIYers repeat the hose-squeezing and idle cycle twice to purge every pocket. (JustAnswer)

Never blend HOAT pink coolant with orange OAT formulas; chemical reactions can turn the liquid into sludge. (Bob Is The Oil Guy) If you must switch types, perform a complete flush first. Distilled water prevents mineral scale-tap water can add deposits or encourage electrolysis. (American Dream Auto Protect)

Most Cayennes hover around 87 °C (188 °F) in normal driving. (rennlist.com) The thermostat starts opening near 80 °C and is fully open by 92 °C, while fans ramp up at roughly 93-105 °C. (RennTech.org Community)

Ethylene glycol tastes sweet but is deadly to pets; as little as a teaspoon per kilogram can be fatal. (Vca, ASPCA Pro) Store unused coolant out of reach and wipe spills immediately.

Used coolant should be recycled through a local hazardous-waste center, not poured on the ground or into a drain, per the U.S. EPA antifreeze disposal guide . Many municipalities accept old radiator fluid alongside motor oil.

Q: What color coolant does my Cayenne use?
A: Porsche specifies a pink/violet G40 HOAT fluid for all gasoline, hybrid, and diesel Cayennes. (eEuroparts)

Q: Can I use green or orange antifreeze instead?
A: Avoid it. Mixing different chemistries can cause gel-like deposits and shorten component life. (Bob Is The Oil Guy)

Q: How much coolant will I need for a complete change?
A: Plan on roughly 18-21 liters for V8 models or 13-16 liters for V6 engines. (amsoil.ca, rennlist.com)

Q: Why 50/50 and not straight antifreeze?
A: Pure glycol carries less heat and freezes sooner than a 50/50 mix; the equal blend hits the sweet spot for freeze and boil protection. (owi.com)

Q: Do I need distilled water?
A: Yes, minerals in tap water can scale passages or corrode metals over time. (American Dream Auto Protect)

Q: How often should I check the level?
A: Monthly, or anytime the dash shows a warning. (CarParts)

Q: What are signs of low coolant?
A: Rising temperature gauge, heater blowing cold air, or a sweet smell under the hood.

Q: My gauge peaks at 220 °F-is that ok?
A: The fan kicks on near that point; short spikes are normal, but steady temperatures above 230 °F require inspection. (JustAnswer)

Q: How do I bleed air without a vacuum tool?
A: Fill, squeeze hoses, idle with heater on high, then top off once bubbles stop. (rennlist.com)

Q: What happens if pets drink coolant?
A: Ethylene glycol poisoning can kill within 12 hours-seek emergency vet care immediately. (Vca, ASPCA Pro)

Q: Can I switch to propylene-glycol "pet-safe" coolant?
A: Only after a full flush; mixing types reduces effectiveness and may void warranties. (Merck Veterinary Manual)

Q: Is thermostat replacement required with every flush?
A: No, but if overheating persists or warm-up is slow, test or replace the thermostat. (JustAnswer)

Q: How should I store extra coolant?
A: Keep sealed containers in a cool, dry spot away from light and out of children's reach. (ASPCA)

Q: Where can I learn more about engine cooling?
A: The Wikipedia overview of internal-combustion engine cooling offers a helpful primer.