What are the effects of high temperatures on rubber and plastic PCV valve hoses in engine systems, and what inspection practices should be followed on Cadillac CTS?

Hoses for engine, accessory and emission systems are made of rubber and plastics that tend to wear out and harden when exposed to high heat under the hood and hence require regular check up for cracks, loose clamps, material hardening and leakage. Most hoses have clamps on them, which should be tightened to prevent leakage; if there are no clamps it should be ensured that the hose has not swollen at the fitting or has become rigid. To cut down the emission of hydrocarbons, the gases produced by crankcase blow-by are drawn through the PCV hoses and discharged at the intake manifold to mix with the fresh incoming air for combust. PCV hoses to be checked for cracks and then if blocked, should be cleaned with the help of solvent. These hoses, which usually come in colours, need certain thickness of the wall and certain temperature resistance; when replacing, make certain that the new hoses are made from the same material as the old ones. Hoses sometimes need to be disconnected for checking and identifying them helps in fixing them back in the correct manner. Some of the things that should be included in the inspection process of the T-fittings include whether the plastic has cracks or distortion which is likely to lead to leak. A small piece of vacuum hose can be used as a stethoscope to diagnose faulty vacuum hoses by putting this check probe up to your mouth and hearing, or rather listening to hissing. Fuel lines are usually connected under pressure and as such, if you need to remove the fuel lines be ready to mop the floor because fuel will drip. Look for signs of deterioration of flexible fuel lines particularly in regions of bends and fittings and when replacing it, only use hoses suitable for the particular fuel injection system. Some fuel lines have clips that allow the usage of easy to disconnect equipment on the fuel line. The metal lines used for the fuel lines under the body should be checked for bends, crimps or crack lines. If the fuel line is a metal type, it has to be replaced with the steel tubing, while copper and aluminum do not possess the necessary for resisting the vibrations of the engine. Moreover, check metal brake lines at the master cylinder and brake proportioning unit for crack, and loose fittings because if any spot of leakage is observed in brake fluid, then it means the brake system requires inspection.

OEM Cadillac PCV Valve Hose

Positive Crankcase Ventilation Valve Hose

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42 PCV Valve Hoses found

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Cadillac PCV Tube Part Number: 12638542
$19.55 MSRP: $36.72
You Save: $17.17 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Tube, Engine Crankcase Ventilation; Crankcase Breather Hose
Fits the following Cadillac Models:
- CT4 | 2022-2024 | V Blackwing | 6 Cyl 3.6 L GAS
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Cadillac PCV Tube Part Number: 12633792
$184.49 MSRP: $374.72
You Save: $190.23 (51%)
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Product Specifications
- Other Name: Tube Assembly-PCV; Crankcase Breather Hose; Tube, Engine Crankcase Ventilation
Fits the following Cadillac Models:
- ATS | 2013-2016 | Base, Luxury | 4 Cyl 2.5 L GAS
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Cadillac PCV Valve Part Number: 12680863
$19.40 MSRP: $36.44
You Save: $17.04 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tube Assembly-PCV; Crankcase Breather Hose; PCV Valve Hose; PCV Hose; PCV Tube; Tube, Engine Crankcase Ventilation
- Replaces: 12644901
Fits the following Cadillac Models:
- SRX | 2012-2016 | Base, Luxury, Performance, Premium | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Cadillac PCV Tube Part Number: 12643692
$16.97 MSRP: $31.86
You Save: $14.89 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tube, PCV; Tube, Engine Crankcase Ventilation
Fits the following Cadillac Models:
- XTS | 2013-2019 | Base, Livery, Luxury, Platinum, Premium, Premium Luxury | 6 Cyl 3.6 L GAS
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Cadillac PCV Tube Part Number: 12630867
$15.09 MSRP: $27.32
You Save: $12.23 (45%)
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Product Specifications
- Other Name: Tube Assembly-PCV (Fresh Air); Crankcase Breather Hose; Tube, Engine Crankcase Ventilation
Fits the following Cadillac Models:
- ATS | 2013-2015 | Luxury, Performance, Premium | 6 Cyl 3.6 L FLEX
- CTS | 2014-2015 | Luxury, Performance, Premium | 6 Cyl 3.6 L FLEX
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Cadillac PCV Tube Part Number: 12659585
$39.14 MSRP: $70.84
You Save: $31.70 (45%)
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Product Specifications
- Other Name: Tube, Engine Crankcase Ventilation
- Replaces: 12654002
Fits the following Cadillac Models:
- XTS | 2014-2019 | Vsport Platinum, Vsport Premium, Vsport Premium Luxury | 6 Cyl 3.6 L GAS
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Cadillac Overflow Hose Part Number: 12701601
$29.20 MSRP: $54.84
You Save: $25.64 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Tube Assembly-PCV Foul Air; Tube, Engine Crankcase Ventilation
- Replaces: 12669953
Fits the following Cadillac Models:
- XT5 | 2017-2023 | Base, Luxury, Platinum, Premium Luxury, Sport | 6 Cyl 3.6 L GAS
- XT6 | 2020-2024 | Premium Luxury, Sport | 6 Cyl 3.6 L GAS
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Cadillac PCV Hose Part Number: 12649933
$19.56 MSRP: $36.74
You Save: $17.18 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tube Assembly-PCV; Crankcase Breather Hose; PCV Tube; Tube, Engine Crankcase Ventilation
Fits the following Cadillac Models:
- XT5 | 2017-2023 | Base, Luxury, Platinum, Premium Luxury, Sport | 6 Cyl 3.6 L GAS
- XT6 | 2020-2024 | Premium Luxury, Sport | 6 Cyl 3.6 L GAS
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Cadillac PCV Tube, Passenger Side Part Number: 12668054
$26.67 MSRP: $48.28
You Save: $21.61 (45%)
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Product Specifications
- Other Name: Tube Assembly-PCV; Crankcase Breather Hose
- Position: Passenger Side
- Replaces: 12662046
Fits the following Cadillac Models:
- ATS | 2016-2019 | V | 6 Cyl 3.6 L GAS
- CT4 | 2022-2024 | V Blackwing | 6 Cyl 3.6 L GAS
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Cadillac PCV Tube, Passenger Side Part Number: 12662046
$26.67 MSRP: $48.28
You Save: $21.61 (45%)
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Product Specifications
- Other Name: Tube Assembly-PCV (Right-Hand Cam Cover To Right-Hand Turbo Inlet); Crankcase Breather Hose; Tube, Engine Crankcase Ventilation
- Position: Passenger Side
- Replaced by: 12668054
Fits the following Cadillac Models:
- ATS | 2016-2019 | V | 6 Cyl 3.6 L GAS
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Cadillac PCV Tube Part Number: 12681076
$88.60 MSRP: $138.79
You Save: $50.19 (37%)
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Product Specifications
- Other Name: Tube Assembly-PCV; Tube, Engine Crankcase Ventilation
- Replaces: 12679947, 12669954
Fits the following Cadillac Models:
- CT6 | 2016-2019 | Luxury, Platinum, Premium Luxury, Sport | 6 Cyl 3.0 L GAS
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Cadillac PCV Tube Part Number: 12679798
$38.65 MSRP: $60.54
You Save: $21.89 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Tube Assembly-PCV; Tube, Engine Crankcase Ventilation
- Replaces: 12670158, 12615963
Fits the following Cadillac Models:
- XTS | 2014-2019 | Vsport Platinum, Vsport Premium, Vsport Premium Luxury | 6 Cyl 3.6 L GAS
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Cadillac PCV Tube Part Number: 12664186
$13.86 MSRP: $21.99
You Save: $8.13 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Tube Assembly-PCV; Crankcase Breather Hose; Tube, Engine Crankcase Ventilation
- Replaced by: 12711468
Fits the following Cadillac Models:
- CT4 | 2020-2024 | Premium Luxury, V | 4 Cyl 2.7 L GAS
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Cadillac PCV Tube, Passenger Side Part Number: 12655014
$21.37 MSRP: $33.46
You Save: $12.09 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Tube Assembly-PCV; Crankcase Breather Hose; Tube, Engine Crankcase Ventilation
- Position: Passenger Side
Fits the following Cadillac Models:
- CT6 | 2016-2019 | Luxury, Platinum, Premium Luxury, Sport | 6 Cyl 3.0 L GAS
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Cadillac PCV Tube Part Number: 12667981
$23.72 MSRP: $37.16
You Save: $13.44 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Tube Assembly-PCV (W/3 Quick Connectors); Crankcase Breather Hose; Tube, Engine Crankcase Ventilation
Fits the following Cadillac Models:
- CT6 | 2019-2020 | Platinum, V | 8 Cyl 4.2 L GAS
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Cadillac PCV Tube Part Number: 12615963
$38.65 MSRP: $60.54
You Save: $21.89 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Tube, Engine Crankcase Ventilation
- Replaced by: 12679798
Fits the following Cadillac Models:
- XTS | 2014-2016 | Vsport Platinum, Vsport Premium | 6 Cyl 3.6 L GAS
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Cadillac PCV Tube Part Number: 12699309
$50.62 MSRP: $79.29
You Save: $28.67 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Tube Assembly-Intake Air Duct PCV; Tube, Engine Crankcase Ventilation
Fits the following Cadillac Models:
- Escalade | 2023 | V | 8 Cyl 6.2 L GAS
- Escalade ESV | 2023 | V | 8 Cyl 6.2 L GAS
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Cadillac PCV Tube, Driver Side Part Number: 12659515
$29.92 MSRP: $49.29
You Save: $19.37 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tube Assembly-PCV; Crankcase Breather Hose; Tube, Engine Crankcase Ventilation
- Position: Driver Side
Fits the following Cadillac Models:
- CT6 | 2016-2019 | Luxury, Platinum, Premium Luxury, Sport | 6 Cyl 3.0 L GAS
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Cadillac PCV Hose Part Number: 12718937
$51.38 MSRP: $84.64
You Save: $33.26 (40%)
ADD TO CART
Product Specifications
- Other Name: Hose-PCV; Hose, Engine Crankcase Ventilation
- Replaced by: 12740189
- Replaces: 55510092
Fits the following Cadillac Models:
- XT4 | 2019-2024 | Luxury, Premium Luxury, Sport | 4 Cyl 2.0 L GAS
- XT5 | 2020-2023 | Luxury, Premium Luxury | 4 Cyl 2.0 L GAS
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Cadillac Vent Tube Part Number: 3540428
Product Specifications
- Other Name: Tube Assembly-Crankcase Vent; PCV Tube; Tube, Engine Crankcase Ventilation
Fits the following Cadillac Models:
- DeVille | 1994 | Concours | 8 Cyl 4.6 L GAS
- Eldorado | 1993-1994 | Base, Sport, Touring | 8 Cyl 4.6 L GAS

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Cadillac PCV Valve Hose

Choose OEM PCV Valve Hose, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with Cadillac's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM Cadillac PCV Valve Hose. You can shop at highly competitive prices and protect your budget. All our genuine Cadillac parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

Cadillac PCV Valve Hose helps in sweeping engine vapor that keeps its performance sharp and politely low in its emission. Cadillac was founded on the principles of aggressive lines, comfortable interiors, and effortless acceleration that makes drivers balance smooth ride comfort with acceleration that is brisk yet not harsh, expansive infotainment displays, and technology that relegates distance and time to the background. Since 1902 Cadillac has been pursuing tomorrow, introducing new celebrity features such as electric starters, adaptive suspension and panoramic glass roofs so the owners remain first in line to whatever the next thing will be. High-quality products, narrow gaps between panels and steering which can be held on at a high speed are evidence of the brand values of pleasure over flash. PCV Valve Hose blow-by gases of the crankcase to the intake, prevents oil froth, reins in emissions and is flexible under the heat of the exhaust manifold which renders bargain tubes brittle. Connectors are so molded, and their internal diameter is so precise, that they fit tight, and the PCV Valve Hose balances crank pressure, silences warning lights, and leaves idle engines cool and trouble-free, without the trouble or gymnastics required for other systems. Any Cadillac power plant, old V8 to hi-tech turbo four are advantaged by getting fumes out clean and combustion of the engine is made clean. New PCV Valve Hose and misfires disappear.

Cadillac PCV Valve Hose Parts and Q&A

PCV Tube
12630867
Q: What are the effects of high temperatures on rubber and plastic PCV valve hoses in engine systems, and what inspection practices should be followed on Cadillac CTS?
A:
Hoses for engine, accessory and emission systems are made of rubber and plastics that tend to wear out and harden when exposed to high heat under the hood and hence require regular check up for cracks, loose clamps, material hardening and leakage. Most hoses have clamps on them, which should be tightened to prevent leakage; if there are no clamps it should be ensured that the hose has not swollen at the fitting or has become rigid. To cut down the emission of hydrocarbons, the gases produced by crankcase blow-by are drawn through the PCV hoses and discharged at the intake manifold to mix with the fresh incoming air for combust. PCV hoses to be checked for cracks and then if blocked, should be cleaned with the help of solvent. These hoses, which usually come in colours, need certain thickness of the wall and certain temperature resistance; when replacing, make certain that the new hoses are made from the same material as the old ones. Hoses sometimes need to be disconnected for checking and identifying them helps in fixing them back in the correct manner. Some of the things that should be included in the inspection process of the T-fittings include whether the plastic has cracks or distortion which is likely to lead to leak. A small piece of vacuum hose can be used as a stethoscope to diagnose faulty vacuum hoses by putting this check probe up to your mouth and hearing, or rather listening to hissing. Fuel lines are usually connected under pressure and as such, if you need to remove the fuel lines be ready to mop the floor because fuel will drip. Look for signs of deterioration of flexible fuel lines particularly in regions of bends and fittings and when replacing it, only use hoses suitable for the particular fuel injection system. Some fuel lines have clips that allow the usage of easy to disconnect equipment on the fuel line. The metal lines used for the fuel lines under the body should be checked for bends, crimps or crack lines. If the fuel line is a metal type, it has to be replaced with the steel tubing, while copper and aluminum do not possess the necessary for resisting the vibrations of the engine. Moreover, check metal brake lines at the master cylinder and brake proportioning unit for crack, and loose fittings because if any spot of leakage is observed in brake fluid, then it means the brake system requires inspection.