Where is the PCV valve and hose located and how do you check it on Lexus ES300?

The PCV valve and hose is located in the valve cover. To check it, disconnect the hose and pull the PCV valve from the cover, then reconnect the hose. With the engine idling at normal operating temperature, place your finger over the valve opening. If there's no vacuum at the valve, check for a plugged hose or valve and replace any plugged or deteriorated hoses. After this, turn off the engine and remove the PCV valve from the hose. Blow through the valve from the valve cover (cylinder head) end. If air will not pass through the valve in this direction, replace it with a new one. To check the PCV valve, first attach a clean section of hose to the cylinder head side of the valve and blow through it - air should pass through easily - then blow through the opposite side of the valve and verify that air doesn't pass through it. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size. Compare the old valve with the new one to make sure they're the same.

Genuine Lexus ES300 PCV Valve

Position Crank Ventilation Valve

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4 PCV Valves found

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Lexus ES300 Ventilation Valve Sub-Assembly
Part Number: 12204-20040
$8.24 MSRP: $10.63
You Save: $2.39 (23%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2001-2003 Lexus ES300 | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK, MCV30L-BEAGKA, MCV31L-BEAGKA
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Lexus ES300 Ventilation Valve Sub-Assembly
Part Number: 12204-20020
$13.64 MSRP: $17.45
You Save: $3.81 (22%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-2001 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
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Lexus ES300 Ventilation Valve Sub-Assembly
Part Number: 12204-20010
$12.37 MSRP: $15.95
You Save: $3.58 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1993-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV10L-BTPGKA, MCV10L-BTPGKK
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Lexus ES300 Ventilation Valve Sub-Assembly
Part Number: 12204-62010
$14.41 MSRP: $18.95
You Save: $4.54 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1994 Lexus ES300 | 6 Cyl 3.0L | 3VZFE; VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK

Lexus ES300 PCV Valve

The Lexus ES300 PCV Valve helps to keep the sedan's engine nice and clean by diverting the crankcase gases back into the cylinders for a second burn, reducing pollution and protecting the interior components. Inside Lexus ES300 models, the PCV Valve sits atop the valve cover and is dependent on manifold vacuum metering flow, so that it's partially closed during idle and swings open when vacuum drops at higher speeds to allow excess blow-by to escape without having to lean the mixture. This simple PCV Valve spring-loaded check design also provides a function of flame arrester, requiring intake backfires to be prevented from pressurizing the crankcase. Across Lexus production years, the layout of the PCV Valve is the same so that drivers see one main style, not many generations, but of course performance still depends on the valve being able to move freely. Regular visual checks help any ES300 stay free of oil sludge buildup that can sap power and raise emissions. A healthy PCV Valve even aids the function of the piston rings by reducing crankcase pressure, slightly improving compression and fuel economy, making it a small part with a big payoff for every Lexus ES300 owner.

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus ES300 PCV Valve available on LexusPartsNow.com. Our OEM Lexus ES300 PCV Valve come with the reassurance of the manufacturer's warranty, a hassle-free return policy, and speedy delivery service, all at affordable prices online. Feel free to shop with confidence!

Lexus ES300 PCV Valve Parts Questions & Experts Answers

Ventilation Valve Sub-Assembly
12204-20020
Q: Where is the PCV valve and hose located and how do you check it on Lexus ES300?
A:
The PCV valve and hose is located in the valve cover. To check it, disconnect the hose and pull the PCV valve from the cover, then reconnect the hose. With the engine idling at normal operating temperature, place your finger over the valve opening. If there's no vacuum at the valve, check for a plugged hose or valve and replace any plugged or deteriorated hoses. After this, turn off the engine and remove the PCV valve from the hose. Blow through the valve from the valve cover (cylinder head) end. If air will not pass through the valve in this direction, replace it with a new one. To check the PCV valve, first attach a clean section of hose to the cylinder head side of the valve and blow through it - air should pass through easily - then blow through the opposite side of the valve and verify that air doesn't pass through it. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size. Compare the old valve with the new one to make sure they're the same.