How to service and repair the valve rocker arm and valve lash adjuster using the EN-47945 Valve Spring Compressor on Chevrolet Colorado?

Service and repair operations on the valve Rocker Arm and valve Lash Adjuster require the use of the en-47945 valve spring compressor (EN-47945). Start by taking off the camshaft cover then slowly turn the Crankshaft to expose the open valve of the affected cylinder so the cam lobe fully compresses the spring. Some engine designs restrict the placement of fasteners when attaching the tool to the Cylinder Head. Fasten the en-47945 onto the engine Cylinder Head through the coil fastener hole using the included fasteners while being careful to prevent engine rotation which could harm the valves. The engine should be rotated in a clockwise direction to position the cam at the base circle so the spring stays compressed until you can remove both the Lash Adjuster and rocker. Both the valve Rocker Arm and valve Lash Adjuster need cleaning before you inspect them both thoroughly. The valve Rocker Arm must receive lubrication while the valve Lash Adjuster needs oil installation prior to addition. Sitting the engine counterclockwise is needed to fully depress the spring by the cam lobe before removing the en-47945 from the Cylinder Head for repeating this procedure if necessary. Finally, install the camshaft cover.

OEM Chevrolet Colorado Lash Adjuster

Lash Adjuster Lifter

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Chevrolet Colorado Valve Lifters Part Number: 17122490
$37.49 MSRP: $61.75
You Save: $24.26 (40%)
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Product Specifications
- Other Name: Lifter, Engine Valve Lifter; Valve Lifter
- Replaces: 05234670, 5234670
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009 Chevrolet Colorado | LT | 8 Cyl 5.3 L GAS
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Chevrolet Colorado Valve Lifters Part Number: 12698945
$30.85 MSRP: $50.82
You Save: $19.97 (40%)
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Product Specifications
- Other Name: Lifter Assembly-Valve (Non Afm); Lifter, Engine Valve Lifter; Lifter, Engine Valve
- Replaces: 12648846, 12576400
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2012 Chevrolet Colorado | LT | 8 Cyl 5.3 L GAS
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Chevrolet Colorado Valve Lifters Part Number: 12690246
$6.25 MSRP: $9.79
You Save: $3.54 (37%)
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Product Specifications
- Other Name: Adjuster Assembly-Dual Feed Hydraulic Valve Lash; Valve Lifter; Adjuster, Engine Valve Lifter
- Replaces: 12640506, 12659430
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2015-2022 Chevrolet Colorado | LT, WT, Z71, ZR2 | 6 Cyl 3.6 L GAS
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Chevrolet Colorado Valve Lifters, Green Line Part Number: 12686787
$14.33 MSRP: $23.63
You Save: $9.30 (40%)
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Product Specifications
- Other Name: Adjuster Assembly-Hydraulic Valve Lash; Filler Cap O-Ring; Adjuster, Engine Valve Lifter; Adjuster, Engine Valve
- Replaces: 12572638, 24100005
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2015-2022, 2004-2012 Chevrolet Colorado | Base, LS, LT, Sport, Sport LS, WT, Z71, Z71 LS, Z85, Z85 LS, ZR2 | 4 Cyl 2.5 L GAS, 4 Cyl 2.8 L GAS, 4 Cyl 2.9 L GAS, 5 Cyl 3.5 L GAS, 5 Cyl 3.7 L GAS, 6 Cyl 3.6 L GAS
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Chevrolet Colorado Valve Lifters Part Number: 12663277
$2.74 MSRP: $4.52
You Save: $1.78 (40%)
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Product Specifications
- Other Name: Adjuster-Hydraulic Valve Lash; Valve Lifter; Adjuster, Engine Valve Lifter; Adjuster, Engine Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2023 Chevrolet Colorado | LT, Trail Boss, WT, Z71, ZR2 | 4 Cyl 2.7 L GAS

Chevrolet Colorado Lash Adjuster

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The Lash Adjuster employed on the Chevrolet Colorado cars has the primary role of moving the valves nearer to the camshaft so as to enhance the motion of the engines while reducing the cases of wear ages of the engines. This is part is also referred to as a tappet and has the function of translating the circular movement of the camshaft into the up and down movement that is needed to open and close the intake and exhaust valves. Chevrolet Colorado models have implemented different Lash Adjusters such as solid, hydraulic, and the roller types. Hydraulic Lash Adjusters are especially popular because they have self-clearance control by use of oil pressure thus eliminating regular adjustment. Roller tappets are gradually being used because of their lower friction and improved efficiency as compared to the flat tappets which are inclusive of the Chevrolet Colorado engine efficiency. It evident that these Lash Adjusters are a result of the advanced engineering of Chevrolet Colorado engines where their design and placement intended to show the different changes in the engine type.

Chevrolet Colorado Lash Adjuster Parts Questions & Experts Answers

Valve Lifters, Green Line
12686787
Q: How to service and repair the valve rocker arm and valve lash adjuster using the EN-47945 Valve Spring Compressor on Chevrolet Colorado?
A:
Service and repair operations on the valve Rocker Arm and valve Lash Adjuster require the use of the en-47945 valve spring compressor (EN-47945). Start by taking off the camshaft cover then slowly turn the Crankshaft to expose the open valve of the affected cylinder so the cam lobe fully compresses the spring. Some engine designs restrict the placement of fasteners when attaching the tool to the Cylinder Head. Fasten the en-47945 onto the engine Cylinder Head through the coil fastener hole using the included fasteners while being careful to prevent engine rotation which could harm the valves. The engine should be rotated in a clockwise direction to position the cam at the base circle so the spring stays compressed until you can remove both the Lash Adjuster and rocker. Both the valve Rocker Arm and valve Lash Adjuster need cleaning before you inspect them both thoroughly. The valve Rocker Arm must receive lubrication while the valve Lash Adjuster needs oil installation prior to addition. Sitting the engine counterclockwise is needed to fully depress the spring by the cam lobe before removing the en-47945 from the Cylinder Head for repeating this procedure if necessary. Finally, install the camshaft cover.