How do i remove the cover to get to the chain for husqvarna455

This info is for 3.0L v6. Remove timing chain cover, make sure timing marks are lined up before you remove sprockets. Remove sprockets and chain as an assembly. Replace as an assembly.

remove the 2 nuts holding the sawdust strut/sidecover and remove side cover. remove chain and bar. clean the chain slot and oil holes on bar. install new chain over bar and place remainder of chain over chain sprocket.back off chain tightener until chain and bar fit. reinstall side cover.

May be its problem with timing chain and it has to be inspected and replaced.Or its possible that timing chain is got misaligned.

There are few help,links provided related to timing chain assembly and dis-assembly. Go through it and confirm proper inspecting of timing chain.

Click the required help link below:----How to Replace Timing Chain Cover & Seal on Audi A4 ? http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-timing-chain-cover-seal.html
----------1982 Toyota Pickup: Set ignition timing, engine overheating, timing chain issue, dist off? http://whatisbyme.blogspot.in/2012/05/1982-toyota-pickup-set-ignition.html
----------How to Remove Timing Chain Cover and Seal on Toyota Previa?

http://technoanswers.blogspot.com/2011/12/how-to-remove-timing-chain-cover-and.html

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How to Remove Timing Chain and Gears on Toyota Previa?

http://technoanswers.blogspot.com/2011/12/how-to-remove-timing-chain-and-gears-on.html

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Ford Mondeo ST220 camshaft Timing specifications? http://technoanswers.blogspot.in/2012/02/ford-mondeo-st220-camshaft-timing.html
------------Replacing Timing Chain Cover For 2009 Ford?

http://repairhelpcenter.blogspot.in/2012/03/replacing-timing-chain-cover-ford-2009.html

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Timing Chains & Front Cover Removal on 2008 Ford Taurus? http://repairhelpcenter.blogspot.in/2012/03/timing-chains-front-cover-removal-on.html
----------How to Replace Timing Chain Cover, Chain, Sprockets, & Seal On Ford Taurus? http://repairhelpcenter.blogspot.in/2012/03/how-to-replace-timing-chain-cover-chain.html
---------How to Replace Timing Chain & Sprockets on Ford Windstar? http://repairhelpcenter.blogspot.in/2012/03/how-to-replace-timing-chain-sprockets.html
---------Timing Chain & Sprockets Replacing on Ford, Mercury and Lincoln? http://fordrepairhelp.blogspot.in/2012/03/timing-chain-sprockets-replacing-on.html
----------How to Replace Timing Chain & Sprockets on Ford Edge and Lincoln MKX? http://howtobyme.blogspot.in/2012/03/how-to-replace-timing-chain-sprockets.html
------How To Replace Timing Chain, Sprockets & Front Cover on Ford Expedition and Lincoln Navigator? http://repairhelpcenter.blogspot.in/2012/03/how-to-replace-timing-chain-sprockets_356.html
---------Timing Chain, Sprockets, Front Cover & Seal removal for Ford Mustang? http://schematicsdiagram.blogspot.in/2012/03/timing-chain-sprockets-front-cover-seal.html
---------How to Replace Timing Chain on Buick LaCrosse? http://howtobyme.blogspot.in/2012/03/how-to-replace-timing-chain-on-buick.html
---------These details will help.For more help keep updated.Thanks.

Removal & Installation

3.5L Engine

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Record the radio anti theft code data.
3. Remove or disconnect the following:
   
   Negative battery cable Engine cover Accessory drive belts Idler pulley Crankshaft pulley Power steering pump pulley Belt tensioner pulley Upper and lower timing belt covers
   
4. Support the engine with a floor jack and remove the engine mount.
5. Rotate the engine to align the camshaft sprocket timing marks with the cylinder head cover timing marks.
   
   

   Fig. Timing belt routing and timing marks-3.5L Engine
   

6. Remove or disconnect the following:
   
   Auto tensioner Timing belt
   
   

   Fig. Timing belt and related components-3.5L Engine
   
   

To install:

1. Ensure that the engine is set to Top Dead Center (TDC).
2. Prepare the auto tensioner for installation by compressing it in a vise and installing a retaining pin.
3. Install the timing belt in the following order:
   1. Crankshaft sprocket
   2. Idler pulley
   3. Left bank exhaust camshaft sprocket
   4. Left bank intake camshaft sprocket
   5. Water pump pulley
   6. Right bank intake camshaft sprocket
   7. Right bank exhaust camshaft sprocket
   8. Tensioner pulley
   
   
4. Install the auto tensioner. Do not remove the retaining pin at this time.
5. Check that the crankshaft and camshaft timing marks are aligned correctly.
6. Rotate the crankshaft 1 / 4 turn Counterclockwise .
7. Rotate the crankshaft 1 / 4 turn Clockwise to return the engine to TDC.
8. Loosen the tensioner pulley center bolt.
9. Apply 44 inch lbs. (5 Nm) torque to the tensioner pulley as shown and tighten the center bolt to 32-41 ft. lbs. (43-55 Nm).
   
   

   Fig. Adjusting the tensioner pulley-3.5L Engine
   

10. Remove the auto tensioner retaining pin.
11. Rotate the crankshaft 2 revolutions Clockwise , then wait 5 minutes for the auto tensioner to adjust.
12. Measure the auto tensioner rod as shown. If the measurement is not 3.8-4.5 mm, then repeat the belt tensioning procedure.
    
    

    Fig. Measuring the auto tensioner rod-3.5L Engine
    

13. When the auto tensioner measurement is correct, install or connect the following:
    
    Engine mount Upper and lower timing belt covers Belt tensioner pulley Power steering pump pulley Crankshaft pulley Idler pulley Accessory drive belts Engine cover Negative battery cable
    
14. Reprogram the radio anti theft codes.

    Kia_Sedona_2002-2006
    Timing Chain, Sprockets, Front Cover & Seal

    • REMOVAL & INSTALLATION

    Print
    

    
    Removal & Installation
    
    3.8L Engine
    

    1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
    2. Record the radio anti theft code data.
    3. Remove the engine from the vehicle.
    4. Remove the drive belt. Remove the power steering pump. Remove the air conditioning compressor.
    5. Remove the alternator. Remove the drive belt idler. Remove the drive belt tensioner. Remove the water pump pulley. Remove the intake manifold.
    6. Remove the connector bracket from the left cylinder head cover. Disconnect the right ignition coil connector, condenser connector and remove the bracket.
    7. Remove the left cylinder head cover retaining bolts. Remove the cylinder head cover from the engine.
    8. Remove the right cylinder head cover retaining bolts. Remove the cylinder head cover from the engine.
    9. Set the No. 1 cylinder to TDC on the compression stroke. Turn the crankshaft pulley and align its groove with the timing mark T of the lower timing chain cover.
    10. Check that the mark of the camshaft timing sprockets are in straight line positioning on the cylinder head surface. If not rotate the crankshaft 360 degrees. Do not rotate the engine counterclockwise.
    11. Remove the oil pan. Remove the crankshaft damper pulley. Remove the timing chain cover.
        NOTE Be careful not to damage the contact surfaces of the cylinder block, cylinder head and timing chain cover. Before removing the timing chain, mark the right and left timing chains with an identification mark based on the location of the sprocket because the identification mark on the chain for TDC can be erased.
        
    12. After compressing the timing chain tensioner, install a set pin. Remove the right cam to cam guide. Remove the right timing chain auto tensioner and timing chain tensioner arm.
    13. Remove the oil pump chain cover. Remove the oil pump chain tensioner assembly. Remove the oil pump chain guide. Remove the right timing chain.
    14. Remove the right timing chain guide. Remove the oil pump chain sprocket and oil pump chain. Remove the crankshaft sprocket, oil pump and camshaft drive gear.
    15. Remove the left cam to cam guide. Remove the left timing chain auto tensioner and timing chain tensioner arm. Remove the left timing chain.
    16. Remove the left timing chain guide. Remove the crankshaft sprocket and left camshaft drive. Remove the tensioner adapter assembly.
        
        

        Fig. Timing chain and related components-3.8L Engine
        

    
    To install:
    
    1. Check the camshaft and crankshaft sprockets for wear and damage, replace as required.
    2. Inspect the tensioner arm and chain guide for wear and damage, replace as required.
    3. Check that the tensioner pin moves smoothly when the ratchet pawl is released with a thin rod.
    4. The key of the crankshaft should be aligned with the timing mark of the timing chain cover. This indicates that the piston is at TDC on the compression stroke.
    5. Install the tensioner adapter assembly. Install the crankshaft sprocket and left camshaft drive.
    6. Install the left timing chain guide and torque the retaining bolts 14-18 ft. lbs.
    7. Install the left timing chain. Be sure to install the chain with no slack between the camshaft and the crankshaft (crankshaft sprocket, timing chain guide, exhaust camshaft sprocket, intake camshaft sprocket). The timing mark of each sprocket should be matched with the timing mark (color ink) of the timing chain at installation of the timing chain.
       
       

       Fig. Left timing chain markings and installation: (D) exhaust camshaft sprocket (C) intake camshaft sprocket-3.8L Engine
       

    8. Install the left timing chain tensioner arm and torque the retaining bolts 14-16 ft. lbs.
    9. Install the left timing chain tensioner and torque the retaining bolts 7-9 ft. lbs.
    10. Install the left cam to cam guide and torque the retaining bolts 7-9 ft. lbs.
    11. Install the crankshaft sprocket, oil pump and right camshaft drive.
    12. Install the oil pump chain and oil pump sprocket. Torque the retaining bolt to 14-16 ft. lbs.
    13. Install the right timing chain guide. Torque the retaining bolts to 14-18 ft. lbs.
    14. Install the right timing chain. Be sure to install the chain with no slack between the camshaft and the crankshaft (crankshaft sprocket, intake camshaft sprocket, exhaust camshaft sprocket). The timing mark of each sprocket should be matched with the timing mark (color ink) of the timing chain at installation of the timing chain.
        
        

        Fig. Right timing chain markings and installation: (C) exhaust camshaft sprocket (B) intake camshaft sprocket-3.8L Engine
        

    15. Install the right timing chain tensioner arm. Torque the retaining bolts to 14-17 ft. lbs.
    16. Install the right timing chain auto tensioner. Torque the retaining bolts to 7-9 ft. lbs.
    17. Install the right cam to cam guide and torque the retaining bolts to 7-9 ft. lbs.
    18. Install the oil pump chain guide. Torque the retaining bolts to 7-9 ft. lbs.
    19. Install the oil pump tensioner assembly. Torque the retaining bolts to 7-9 ft. lbs.
    20. Pull out the pins on both the left and right hydraulic tensioners. Install the oil pump chain cover.
    21. Rotate the crankshaft two revolutions in the clockwise direction. Confirm the timing mark. Be sure to rotate the crankshaft in the clockwise direction.
    22. Apply sealant on the chain cover and on the cylinder head, cylinder block, and lower oil pan. Be sure these parts are free of engine oil and dirt.
        NOTE Before assembling the timing chain cover, the liquid sealant TB1217H should be applied on the gap between the cylinder head and block. The part must be assembled with five minutes after the sealant is applied.
        
        
        

        Fig. Sealant application (1 inch bead width)-3.8L Engine
        

    23. Apply sealant on the chain cover.
        NOTE The liquid sealant TB1217H should be applied on the gap between the cylinder head and block. The part must be assembled with five minutes after the sealant is applied.
        
        
        

        Fig. Timing cover sealant application-3.8L Engine
        

    24. Install a new gasket to the timing case cover.
        NOTE It is important that the dowel pins on the cylinder block and holes on the timing chain cover should be used as a reference in order to assemble the timing chain cover in the correct position.
        
        
        

        Fig. Timing cover gasket installation (A) gaskets-3.8L Engine
        

    25. Install the timing chain cover. Torque the retaining bolts in the proper sequence and to specification. The engine should not be started for at least thirty minutes after timing chain cover assembly.
        
        

        Fig. Timing cover bolt torque sequence and specification-3.8L Engine
        

    26. Install the timing case cover oil seal.
    27. Continue the installation in the reverse order of the removal procedure.

The chain cover is there to protect the chain from collecting dirt and and to save anything getting stuck in the chain eg. cloth which you are wearing.
The chain cover also protects the chain because when you leave the chain open to the elements you have to constantly oil the chain which dries out due to dirt, and in turn when you oil the chain too much the oil flows off the chain which would get on clothes etc.
Removing the chain cover does not damage the chain but the maintenance sure does increase trust me i have done it and I know, hope this helps

Timing Chain & Gears Removal & Installation To Remove:
NOTE: Keep the cam chain away from magnetic fields.
Crankshaft set at TDC marks

1. Turn the crankshaft pulley so its Top Dead Center (TDC) mark (1) lines up with the pointer (2).
2. Raise and support the vehicle.
3. Remove the front tires/wheels. Front undercar splash shield
   
   
4. Remove the front undercar splash shield.
5. Remove the drive belt.
6. Remove the cylinder head cover (See section on Valve Cover).
7. Remove the crankshaft pulley (See section on Crankshaft Damper). CKP sensor and VTC solenoid electrical connectors
   
   
8. Disconnect the Crankshaft Position (CKP) sensor connector (1) and Variable Valve Timing Control (VTC) oil control solenoid valve connector (2).
9. Remove the VTC oil control solenoid valve (See section on VTC Solenoid Valve).
10. Support the engine with a jack and wood block under the oil pan. Ground cable and upper bracket removal
    
    
11. Remove the ground cable (1), and remove the upper bracket (2). Side engine mount bracket removal
    
    
12. Remove the side engine mount bracket. Timing chain cover removal
    
    
13. Remove the timing chain cover bolts both from the front to the block and from the bottom to the oil pan.
14. Remove the timing chain cover.
15. Loosely install the crankshaft pulley. Compress the timing chain auto-tensioner
    
    
16. Turn the crankshaft counterclockwise to compress the auto-tensioner. Lock the timing chain auto-tensioner
    
    
17. Align the holes on the lock (1) and the auto tensioner (2), and then insert a 0.06 inch (1.5 mm) diameter pin (3) into the holes.
18. Turn the crankshaft clockwise to secure the pin. Removal of the timing chain auto-tensioner
    
    
19. Remove the auto-tensioner. Removal of the timing chain guide B
    
    
20. Remove the cam chain guide B. Removal of the timing chain guide A
    
    
21. Remove the cam chain guide A (1) and tensioner arm (2).
22. Remove the cam chain.

1998-2003 To Remove:

1. Remove or disconnect the following:
   • Crankshaft pulley and hub
   • Drive belt tensioner
     
     
   • Timing chain cover bolts
     
     
   • Timing chain cover and gasket
2. Install a bolt in the end of the crankshaft CAUTION
   Do not install the crankshaft balancer bolt or a bolt longer than 1 inch or damage to the crankshaft threaded hole will result.
   
3. Rotate crankshaft until the number 1 piston is at Top Dead Center of compression stroke.
4. Make sure that the alignment marks are aligned with the tabs on the timing chain tensioner.
   
   
5. Measure distance between hole in bracket and unworn surface of timing chain tensioner shoe. NOTE: If distance between the hole and unworn surface of timing chain tensioner is greater than 0.314 in (8 mm), replace tensioner, timing chain and sprockets.
   
6. Remove timing chain tensioner bolts.
7. Remove the timing chain, timing chain tensioner and camshaft sprocket at the same time.
8. Remove the crankshaft sprocket using special tool J 22888-20A or equivalent.
9. Remove crankshaft sprocket alignment key.

NOTE: If any camshaft components are being replaced to correct a noise problem, all camshaft drive components must be replaced.
To Install:

1. Install the crankshaft sprocket alignment key.
2. Install the crankshaft sprocket using special tool J 5590 or equivalent.
   
   
3. Compress the timing chain tensioner spring and insert a pin into the tensioner hole to retain the tensioner shoe.
4. Install timing chain and timing chain tensioner (do not tighten tension bolts).
5. Align the crankshaft and camshaft timing marks with the tab on the timing chain tensioner.
6. Tighten the timing chain tensioner bolts.
   • Torque to: 18 ft lbs (24 Nm)
7. Tighten the camshaft sprocket bolt.
   • Torque to: 96 ft lbs (130 Nm)
8. Remove pin from timing chain tensioner hole.
9. Remove bolt from end of crankshaft. CAUTION
   Inspect the timing chain cover for warping or damage. Replace if needed.
   
10. Clean all timing chain cover mating surfaces.
11. Install or connect the following:
    • Timing chain cover to the engine block
      1. Ensure that the gasket is installed properly in the groove in the timing chain cover
    • Timing chain cover and make sure it fully seated on the alignment dowel pins
    • Timing chain cover bolts
      1. Torque to: 97 inch lbs (11 Nm)
    • Drive belt tensioner
    • Crankshaft damper hub and the crankshaft pulley

What he said. You may need to clamp it something to pull it back. Next time ensure the chain brake isn't tripped before removing the cover. HTH
Lou

This MAY seem Strange But It IS ALL necessary for Oil Pump Replacement. And Please Don't Forget to Rate Me as Most Folks Do Not. Thank You and GOOD LUCK with the Oil Pump Job Also


OIL PUMP
It is necessary to remove the oil pan, oil pickup and chain case cover to service the oil pump rotors. The oil pump pressure relief valve can be serviced by removing the oil pan and oil pickup tube. Refer to Timing Chain Cover Removal and Installation for procedures.

DISASSEMBLY

1. To remove the relief valve, proceed as follows:
2. Drill a 3.175 mm (1/8 inch) hole into the relief valve retainer cap and insert a self-threading sheet metal screw into cap.

1. Clamp screw into a vise and while supporting chain case cover, remove cap by tapping chain case cover using a soft hammer. Discard retainer cap and remove spring and relief valve.
2. Remove oil pump cover screws, and lift off cover.
3. Remove pump rotors.

1. Wash all parts in a suitable solvent and inspect carefully for damage or wear.

Oil Pump Assembly

1. Assemble pump, using new parts as required. Install the inner rotor with chamfer facing the cast iron oil pump cover.
2. Tighten cover screws to 12 Nm (105 inch lbs.).
3. Prime oil pump before installation by filling rotor cavity with engine oil.
4. Install chain case cover. Refer to Timing Chain Cover Installation.

REMOVAL of Timing cover
REMOVAL

1. Disconnect negative cable from battery.
2. Remove timing chain cover.

REMOVAL Of Oil Pan to gain Access to OIL PUMP

1. Disconnect negative cable from battery and remove engine oil dipstick.
2. Raise vehicle on hoist and drain engine oil.
3. Remove bending brace to transaxle attaching bolt.
4. Remove bolts attaching dust cover to transaxle housing. Lower dust cover to gain access to oil pan bolts.
5. Remove oil pan screws and remove oil pan.

INSTALLATION

1. Clean surfaces and apply a 1/8 inch bead of Mopar (R) Silicone Rubber Adhesive Sealant or equivalent, at the parting line of the chain case cover and the rear seal retainer.
   1. Use a new pan gasket.
   2. Install pan and tighten screws to 12 Nm (105 inch lbs.).
   3. Install dust shield and bending brace to transaxle housing.
   4. Lower vehicle and install oil dipstick.
   5. Connect negative cable to battery.
   6. Fill crankcase with oil to proper level.