How to remove and install the camshaft and Lash Adjuster in 2.4L four cylinder engine on GMC Terrain?

The removal of it turns out to be complicated and special tools are needed, new camshaft sprocket bolts, which you should probably buy every time. There are three special implements required to hold the timing chain relative to the cylinder head on the intake and the exhaust side. Then the pressure of the fuel system must be released and the negative terminal of the battery must be disconnected whereas the air filter housing, the ignition coils, the spark plugs, and the valve cover should be unbolted. The timing chain tensioner is then removed, the crankshaft is turned in order to place the special tool that will loosen the camshaft actuator bolts in place. All actuators are tagged for the re assembly and the upper chain guide is also taken off. Other tools are used to secure the timing chain before the removal of camshaft actuators and camshaft solenoids. Camshaft cap is identified by its location and orientation; the camshafts are lifted off the cylinder head but all the related accessories have to remain neat. The hydraulic lash adjusters are located on the heads or issuces of their respective rockers and properly storrage with the rockers. Lash adjusters, for example, are checked for wear or damage, and the measurements of the rocker arms as well as camshaft lobes are gone through to meet a specified gauge. Any elements, which are recognized as worn beyond their acceptable limit, have to be replaced. There is also the lubrication of the rocker arms and the lash adjusters, correct setting of the camshafts and the final tightening of the bearing caps as per a set sequence. Camshaft sprocket actuators and timing chain are put in position and screwed then timing chain tensioner is reprogrammed. Last of all, the upper timing chain guide is bolted and tightened and the battery connection is restored and the process is then done.

Genuine GMC Camshaft

Cam

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

98 Camshafts found

View related parts
GMC Camshaft Asm
Part Number: 12629512
$138.26 MSRP: $236.42
You Save: $98.16 (42%)
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
Fits the following GMC Models:
- Sierra | 2014-2018 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, CREW CAB 1/2 TON | 8 Cyl 6.2L
- Yukon | 2015-2020 | 1500 4 DOOR SUV, 1500 4 DOOR UTILITY, 4 DOOR, 4 DOOR SUV | 8 Cyl 6.2L
View related parts
GMC Camshaft Assembly, Exhaust
Part Number: 12675774
$86.53 MSRP: $147.96
You Save: $61.43 (42%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Camshaft Assembly, Exh; Camshaft
- Replaces: 12677324, 12665273, 12672941
Fits the following GMC Models:
- Terrain | 2018-2024 | 4 DOOR SLE2, 4 DOOR SLE2 , 4 DOOR SLT1, 4 DOOR SLT1 , 4 DOOR SLT2 | 4 Cyl 1.5L
View related parts
GMC Camshaft Asm
Part Number: 12619823
$123.78 MSRP: $211.66
You Save: $87.88 (42%)
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
Fits the following GMC Models:
- Sierra | 2014-2022 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl5.3L
- Yukon | 2015-2020 | 1500 4 DOOR SUV, 1500 4 DOOR UTILITY, 4 DOOR | 8 Cyl 5.3L
View related parts
GMC Camshaft Asm
Part Number: 12625436
$401.45 MSRP: $686.46
You Save: $285.01 (42%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12593207
Fits the following GMC Models:
- Envoy | 2007-2009 | 4 DOOR | 8 Cyl 5.3L
- Sierra | 2007-2013 | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
- Yukon | 2007-2014 | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
View More
View related parts
GMC Camshaft Assembly, Exhaust
Part Number: 12604896
$95.74 MSRP: $165.18
You Save: $69.44 (43%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft, Valve Cover
Fits the following GMC Models:
- Terrain | 2010-2017 | SLE1 SUV, SLE2 SUV, SLT SUV | 4 Cyl 2.4L
View related parts
GMC Camshaft Assembly, Overhead Vlv
Part Number: 12689035
$215.71 MSRP: $522.40
You Save: $306.69 (59%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Camshaft
- Replaces: 12625437, 12593205
Fits the following GMC Models:
- Canyon | 2009-2012 | PICKUP, PICKUP CREW CAB, PICKUP EXTENDED CAB, PICKUP EXTENDED LENGTH | 8 Cyl 5.3L
- Savana | 2008-2017 | 1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 1/2 TON CARGO EXPRESS, 1/2 TON CARGO SAVANA, 1/2 TON PASSENGER EXPRESS, 1/2 TON PASSENGER SAVANA, 3/4 TON CARGO EXPRESS, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER EXPRESS, 3/4 TON PASSENGER SAVANA | 8 Cyl 4.8L, 8 Cyl 4.8L Flex, 8 Cyl 5.3L
- Sierra | 2007-2013 | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 4.8L, 8 Cyl 4.8L Flex, 8 Cyl 5.3L
- Yukon | 2007-2009 | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 4.8L
View More
View related parts
GMC Camshaft Asm
Part Number: 12612273
$444.05 MSRP: $759.31
You Save: $315.26 (42%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12583227
Fits the following GMC Models:
- Sierra | 2007-2008 | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.2L
- Yukon | 2007-2008 | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L
View related parts
GMC Camshaft Asm
Part Number: 12625440
$326.26 MSRP: $557.87
You Save: $231.61 (42%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12609370
Fits the following GMC Models:
- Savana | 2009-2015 | 1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER EXPRESS, 3/4 TON PASSENGER SAVANA | 8 Cyl 6.0L, 8 Cyl 6.0L Flex
- Sierra | 2009-2010 | CREW CAB 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CAB CHASSIS 1 TON 161.5, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.0L, 8 Cyl 6.0L Flex
- Yukon | 2009-2014 | 3/4 TON, XL 3/4 TON | 8 Cyl 6.0L, 8 Cyl 6.0L Flex
View More
View related parts
GMC Camshaft,Engine
Part Number: 12560967
$504.15 MSRP: $800.41
You Save: $296.26 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
Fits the following GMC Models:
- Envoy | 2003-2004 | 4 DOOR, 4 Door XL, 4 DOOR XUV | 8 Cyl 5.3L
- Savana | 2003-2007 | 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 1/2 TON CARGO SAVANA, 1/2 TON PASSENGER SAVANA, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER SAVANA | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex
- Sierra | 1999-2007 | 1500 CREW CAB LONG BOX, 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB SHORT BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 CREW CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB LONG BOX, CLASSIC 1500 EXTENDED CAB SHORT BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
- Yukon | 2000-2006 | 1/2 TON, 3/4 TON, XL 1/2 TON, XL 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
View More
View related parts
GMC Camshaft, Exhaust (Machining)
Part Number: 24100366
$141.15 MSRP: $223.10
You Save: $81.95 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
Fits the following GMC Models:
- Canyon | 2004-2012 | PICKUP, PICKUP CREW CAB, PICKUP EXTENDED CAB, PICKUP EXTENDED LENGTH | 5 Cyl 3.5L, 5 Cyl 3.7L
View related parts
GMC Camshaft Asm
Part Number: 12561721
$504.15 MSRP: $800.41
You Save: $296.26 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
Fits the following GMC Models:
- Savana | 2003-2007 | 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER SAVANA | 8 Cyl 6.0L
- Sierra | 2001-2007 | 1500 CREW CAB LONG BOX, 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB SHORT BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS EXTENDED CAB 185.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 CREW CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB LONG BOX, CLASSIC 1500 EXTENDED CAB SHORT BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 6.0L
- Yukon | 2001-2006 | 1/2 TON, 3/4 TON, XL 1/2 TON, XL 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L
View More
View related parts
GMC Camshaft Assembly, Intake
Part Number: 12638651
$110.83 MSRP: $174.39
You Save: $63.56 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
Fits the following GMC Models:
- Acadia | 2017-2021 | SLE SUV, SLE2 & ALL TERRAIN SUV, SLE2 SUV, SLT & ALL TERRAIN SUV, SLT SUV | 4 Cyl 2.5L
- Canyon | 2015-2022 | CREW CAB - 5'2" BOX, EXT CAB - 6'2" BOX, EXTENDED CAB - 6'2" BOX, SLE CREW CAB - 5'2" BOX, SLE EXTENDED CAB - 6'2" BOX, SLT CREW CAB - 5'2" BOX, SLT EXTENDED CAB - 6'2" BOX | 4 Cyl 2.5L
View related parts
GMC CAMSHAFT ASM
Part Number: 12664911
$108.05 MSRP: $186.34
You Save: $78.29 (43%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Camshaft
- Replaced by: 12723516
Fits the following GMC Models:
- Sierra | 2019-2024 | CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, Crew Cab 6'6" Box 1/2 Ton, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L
- Yukon | 2021-2024 | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L
View related parts
GMC CAMSHAFT ASM
Part Number: 12664912
$146.64 MSRP: $201.57
You Save: $54.93 (28%)
ADD TO CART
Product Specifications
- Other Name: Camshaft
Fits the following GMC Models:
- Sierra | 2019-2024 | CREW CAB 5'8" BOX 1/2 TON, Crew Cab 6'6" Box 1/2 Ton, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON | 8 Cyl 6.2L
- Yukon | 2021-2024 | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L
View related parts
GMC Camshaft Asm
Part Number: 12629698
$223.98 MSRP: $382.95
You Save: $158.97 (42%)
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12612275
Fits the following GMC Models:
- Sierra | 2007-2013 | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.0L, 8 Cyl 6.0L Flex
- Yukon | 2007-2013 | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L, 8 Cyl 6.0L Flex
View related parts
GMC CAMSHAFT ASM,OVERHEAD VLV
Part Number: 19432226
$354.04 MSRP: $610.73
You Save: $256.69 (43%)
ADD TO CART
Product Specifications
- Replaces: 12633773
Fits the following GMC Models:
- Sierra | 2014-2021 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 6 Cyl 4.3L
View related parts
GMC Camshaft Assembly, Exhaust
Part Number: 12625991
$13.64 MSRP: $21.46
You Save: $7.82 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12583314, 12620449, 12609249
Fits the following GMC Models:
- Acadia | 2007-2008 | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD | 6 Cyl 3.6L
View related parts
GMC CAMSHAFT ASM,INT
Part Number: 19431713
$259.56 MSRP: $413.98
You Save: $154.42 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Camshaft
- Replaces: 12603535, 12609252, 12625989, 19420582, 12603545, 12604374, 12632195, 19420031
Fits the following GMC Models:
- Acadia | 2007-2011 | SPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD, SPORT UTILITY VEHICLE AWD | 6 Cyl 3.6L
- Terrain | 2010-2011 | SLE2 SUV, SLT SUV | 6 Cyl 3.0L
View related parts
GMC Camshaft Assembly, Exhaust
Part Number: 12677833
$69.19 MSRP: $108.88
You Save: $39.69 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Camshaft Assembly, Exh; Camshaft
- Replaces: 12647877
Fits the following GMC Models:
- Acadia | 2017-2023 | DENALI SUV, SLE SUV, SLE2 & ALL TERRAIN SUV, SLE2 SUV, SLT & ALL TERRAIN SUV, SLT SUV, SLT2 SUV | 6 Cyl 3.6L
- Canyon | 2017-2022 | CREW CAB - 5'2" BOX, CREW CAB - 6'2" BOX, CREW CAB SLE - 6'2" BOX, CREW CAB SLT - 6'2" BOX, EXT CAB - 6'2" BOX, EXTENDED CAB - 6'2" BOX, SLE CREW CAB - 5'2" BOX, SLE EXTENDED CAB - 6'2" BOX, SLT CREW CAB - 5'2" BOX, SLT EXTENDED CAB - 6'2" BOX | 6 Cyl 3.6L
View related parts
GMC Camshaft Assembly, Int
Part Number: 12687189
$72.99 MSRP: $116.38
You Save: $43.39 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Camshaft
- Replaces: 12677825, 12647869
Fits the following GMC Models:
- Acadia | 2017-2023 | DENALI SUV, SLE SUV, SLE2 & ALL TERRAIN SUV, SLE2 SUV, SLT & ALL TERRAIN SUV, SLT SUV, SLT2 SUV | 6 Cyl 3.6L
- Canyon | 2017-2022 | CREW CAB - 5'2" BOX, CREW CAB - 6'2" BOX, CREW CAB SLE - 6'2" BOX, CREW CAB SLT - 6'2" BOX, EXT CAB - 6'2" BOX, EXTENDED CAB - 6'2" BOX, SLE CREW CAB - 5'2" BOX, SLE EXTENDED CAB - 6'2" BOX, SLT CREW CAB - 5'2" BOX, SLT EXTENDED CAB - 6'2" BOX | 6 Cyl 3.6L

| Page 1 of 5 |Next >

1-20 of 98 Results

GMC Camshaft

You're in the right place for budget-friendly OEM GMC Camshafts. Our extensive catalog features genuine GMC Camshafts, each backed by a manufacturer's warranty and guaranteeing superior quality, dependability, and longevity. Discover how shopping with us can save you both time and money when investing in our auto parts.

GMC Camshaft Parts Questions & Experts Answers

Camshaft Assembly, Exhaust
12604896
Q: How to remove and install the camshaft and Lash Adjuster in 2.4L four cylinder engine on GMC Terrain?
A: The removal of it turns out to be complicated and special tools are needed, new camshaft sprocket bolts, which you should probably buy every time. There are three special implements required to hold the timing chain relative to the cylinder head on the intake and the exhaust side. Then the pressure of the fuel system must be released and the negative terminal of the battery must be disconnected whereas the air filter housing, the ignition coils, the spark plugs, and the valve cover should be unbolted. The timing chain tensioner is then removed, the crankshaft is turned in order to place the special tool that will loosen the camshaft actuator bolts in place. All actuators are tagged for the re assembly and the upper chain guide is also taken off. Other tools are used to secure the timing chain before the removal of camshaft actuators and camshaft solenoids. Camshaft cap is identified by its location and orientation; the camshafts are lifted off the cylinder head but all the related accessories have to remain neat. The hydraulic lash adjusters are located on the heads or issuces of their respective rockers and properly storrage with the rockers. Lash adjusters, for example, are checked for wear or damage, and the measurements of the rocker arms as well as camshaft lobes are gone through to meet a specified gauge. Any elements, which are recognized as worn beyond their acceptable limit, have to be replaced. There is also the lubrication of the rocker arms and the lash adjusters, correct setting of the camshafts and the final tightening of the bearing caps as per a set sequence. Camshaft sprocket actuators and timing chain are put in position and screwed then timing chain tensioner is reprogrammed. Last of all, the upper timing chain guide is bolted and tightened and the battery connection is restored and the process is then done.