Timing Belts and Chains

How do you install a timing chain tensioner?

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2006-10-21 16:26:03
2006-10-21 16:26:03

Here are opinions and answers from FAQ Farmers: * The timing chain tensioner is a snap...getting to it is the problem. You have to undo the engine mounts and pivot the engine down, as well as remove the front right fender liner and wheel (possibly remove some suspension components also) to get the cover off. Just disregard that last part if you are already to the point of resetting the timing. If I remember there are two pieces to the tensioner (for a Grand Am anyway), but there were also different models of the same part available from GM, a pivoting assembly with a wheel on the end of it and a bolt to tighten it. Also be careful to put everything back correctly because for some reason GM thinks that the timing chain is a good place to run the water pump off of. * If you are installing the old tensioner you will need to compress the piston on the tensioner slowly with a vise. You will see a hole in whitch you can put a small "pin", line up the holes and slide it in being careful to get all the way through to the other side. Failing to do so could crake the aluminum housing. If you are installing a new one, it should go on the same way you took it off.

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{| |+ Special Service Tool(s) |- | Cam Positioning ToolT91P-6256-A Cam Positioning Tool AdaptersT92P-6256-A Camshaft Holding ToolT96T-6256-B Camshaft Positioning ToolT96T-6256-AR Removal # Remove the engine front cover; refer to the procedure in this section. # Remove the (A) crankshaft sensor ring from the (B)crankshaft (6303).# On WEP engines, use the (A) Camshaft Positioning Tool to position the (B) camshaft.# on REP engines, rotate the crankshaft until both camshaft keyways are 90° from the cam cover surface. On REP and WEP engines, make sure the copper links line up with the dots on the camshaft sprockets.# On REP equipped engines, install the (A) Cam Positioning Tool and the Camshaft Positioning Tool Adapters on the (B) camshaft.# On WEP engines, install the (A) Camshaft Holding Tool on the (B) camshaft.# Remove the (A) LH timing chain tensioner bolts and the (B) LH timing chain tensioner.# Remove the (A) RH timing chain tensioner bolts and the (B) RH timing chain tensioner.# Remove the LH and RH timing chain tensioner guides from the dowel pins.# CAUTION: At no time, when the timing chains are removed and the cylinder heads are installed may the crankshaft or camshaft be rotated. Severe piston and valve damage will occur. Remove the RH and LH timing chains and crankshaft sprockets. ## Lift RH timing chain off of the camshaft sprocket and slide the timing chain and crankshaft sprocket off of the crankshaft. ## Lift the LH timing chain off the camshaft sprocket and slide the timing chain and the crankshaft sprocket off of the crankshaft.# On REP engines, remove the chain guides. ## Remove the LH timing chain guide bolts. ## Remove the LH timing chain guide. ## Remove the RH timing chain guide bolts. ## Remove the RH timing chain guide.# On WEP engines, remove the chain guides. ## Remove the LH timing chain guide bolts. ## Remove the LH timing chain guide. ## Remove the RH timing chain guide bolts. ## Remove the RH timing chain guide.Installation CAUTION: Timing chain procedures must be followed exactly or damage to valves and pistons will result. # Compress the timing chain tensioners (6L266). ## Release the lock assembly on the timing chain tensioners. ## Compress the timing chain tensioners.# Install the retaining pins.# Check the following components for part number orientation.! valign="bottom" | Item ! valign="bottom" | Part Number ! valign="bottom" | Description | 1 6268 Timing Chain/Belt (RH) 2 - RH Timing Chain Guide (WEP) 3 6L253 Timing Chain Tensioner Arm (LH) 4 6L266 Timing Chain Tensioner (LH) 5 6268 Timing Chain/Belt (LH) 6 - LH Timing Chain Guide (WEP) 7 6K297 Timing Chain Guide, (REP) RH 8 6L253 Timing Chain Tensioner Arm (RH) 9 6L266 Timing Chain Tensioner (RH) 10 6K297 Timing Chain Guide, (REP) RH# On REP engines, install the timing chain guides. ## Position LH timing chain guide. ## Install and torque the LH timing chain guide bolts. ## Position the RH timing chain guide. ## Install and torque the RH timing chain guide bolts.# On WEP engines, install the timing chain guides. ## Position the LH timing chain guide. ## Install and torque the LH timing chain guide bolts. ## Position the RH timing chain guide. ## Install and torque the RH timing chain guide bolts.# Install the timing chain/belts (6268) and crankshaft sprockets (6306). ## Slide the (A)crankshaft sprocket onto the (B) crankshaft, aligning the copper link on the timing chain/belt with the dot on the crankshaft sprocket. ## Position thetiming chain/belt over the camshaft sprocket, aligning the copper link with the dot on the camshaft sprocket.# Make sure that the (A) copper marks on the timing chain/belts are lined up with the corresponding dots on the crankshaft and camshaft sprockets.# Make sure that the (A) camshaft sprocket keyway is 90° from the (B) cam cover mounting surface.# Make sure that the (A) RH timing chain sprocket is on the front of the (B) LH timing chain sprocket with the hubs facing each other.# Position the LH and RH timing chain tensioner guides on the dowel pins.# Position the RH timing chain tensioner and install the timing chain tensioner bolts.# Position the LH timing chain tensioner and install the timing chain tensioner bolts.# Remove both the RH and LH retaining pins from the timing chain tensioners.# On REP engines, remove (A) Cam Positioning Tool and the Camshaft Positioning Tool Adapters on the (B) camshaft (6250).# On WEP engines, remove the (A) Camshaft Holding Tool from the (B) camshaft.# On WEP engines, remove the (A) camshaft positioning tool from the (B) camshaft.# Install the (A) crankshaft sensor ring on the (B) crankshaft.# Install the engine front cover; refer to the procedure in this section. |}

The timing chain tensioner bolt sticks out the back left side of the cylinder head. Take the timing chain cover off on the left side of the motor too see the inside to the chain tensioner.

The 2.2 ecotec motor has a timing chain with oil pressure tensioner and chain guides.

It has two chains. CAUTION: At no time, when the timing chain(s) are removed and the cylinder heads are installed, may the crankshaft and/or camshafts be rotated. Failure to follow these directions will result in valve and/or piston damage. NOTE: Because this is not a free-wheeling engine, and it jumps time, there will be damage to the valves and/or pistons and will require the removal of the cylinder heads. The camshaft sprockets should only be disassembled from the camshafts when one of the components is to be replaced. Remove Valve Covers, Oil Pan and Engine Front Cover. Remove crankshaft position sensor pulse wheel. Rotate engine to No. 1 top dead center (TDC). Remove two bolts retaining RH timing chain tensioner to cylinder head and remove timing chain tensioner. Remove RH timing chain tensioner arm. Remove two bolts retaining RH timing chain guide to cylinder head and remove timing chain guide. Remove RH timing chain from camshaft sprocket and crankshaft sprocket. Remove two bolts retaining LH timing chain tensioner to cylinder head and remove timing chain tensioner. Remove LH timing chain tensioner arm. Remove two bolts retaining LH timing chain guide to cylinder head and remove timing chain guide. Remove LH timing chain from camshaft sprocket and crankshaft sprocket. CAUTION: Do not rotate crankshaft and/or camshafts or possible engine damage may occur. Inspect the plastic running face on timing chain tensioner arms and timing chain guides. If worn or damaged, remove and clean oil pan and oil pump screen cover and tube. Installation NOTE: If engine has jumped time, make sure that all repairs to engine components and/or valve train have been made. Then rotate engine counterclockwise 45 degrees. This will position all pistons below top of deck face. Install Cylinder Heads as outlined. Locate the copper links on the timing chains. They will be 180 degrees apart fro one another on each chain. When installing the chains on the gears, line one copper link on the chain with the alignment mark on the crank gear, and line up the other copper link on chain with the cam gear mark on each respective side of the engine. On the crank gear, both chains line up to the same mark. Install timing chain guides . Install timing chain guide retaining bolts. Tighten to 8-12 Nm (71-106 lb-in). NOTE: Crankshaft sprockets are identical. They may only be installed one way. Install LH timing chain on camshaft sprocket. Make sure copper link of timing chain lines up with timing mark of camshaft sprocket. Install LH timing chain on crankshaft sprocket. Make sure copper link of timing chain lines up with timing mark of crankshaft sprocket. Install RH timing chain on camshaft sprocket. Make sure copper link of timing chain lines up with timing mark of camshaft sprocket. Install RH and LH timing chain tensioner and secure with two bolts on each. Tighten bolts to 20-30 Nm (15-22 lb-ft). Lubricate timing chain tensioner arm contact surfaces with clean engine oil, and install RH and LH timing chain tensioner arms on their dowels. With a suitable C-clamp around the timing chain tensioner arm and timing chain guide, remove all slack from timing chain while using caution not to bend the timing chain guide. Remove lock pins from timing chain tensioners and make sure all timing marks are aligned. Install Engine Front Cover, Oil Pan and Valve Covers. Start engine and check for leaks and proper operation.

The Pontiac Grand Prix has a Timing Chain with a spring loaded tensioner. The tensioner is know to wear, crack and then break. The timing chain and tensioner should be replaced at 100,000 miles. This is a pretty big job that can be done with the motor in the car. $$$ Ray

{| ! valign="bottom" | Item ! valign="bottom" | Part Number ! valign="bottom" | Description | 1 6M250 Timing Chain/Belt Idler, Upper 2 6256 Camshaft Sprocket, Front 3 6M250 Timing Chain/Belt Idler, Lower 4 6306 Crankshaft Sprocket 5 6K254 Timing Chain/Belt Tensioner 6 6256 Camshaft Sprocket, Rear Removal # Remove the Engine Front Covers (6019). Refer to the procedure in this section. # Remove the three nuts and the engine support insulator through bolt from the engine support insulator. Remove the front engine support bracket (6028). # Raise and support the vehicle. # Align the crankshaft sprocket (6306) to TDC by turning the crankshaft (6303) in the direction of normal engine (6007) rotation. # NOTE: Remove the lower timing chain tensioner arm bolt before the upper timing chain tensioner arm bolt. Remove two bolts from the timing chain tensioner arm (6285) in the order shown. Remove the timing chain tensioner arm. # Mark the direction of rotation on the timing chain/belt (6268) to be sure of proper installation. # Loosen the timing chain/belt tensioner bolt. # Remove the timing chain/belt. Installation # Compress the timing chain tensioner arm until the hole in the piston is aligned with the second hole in the case. Insert a 1.6mm (0.06 inch) diameter wire or pin through the second hole to keep the piston compressed. # Align the camshafts (6250) to top dead center (TDC). # Turn the crankshaft clockwise until the crankshaft sprocket is offset from TDC by one tooth. # Install the timing chain/belt.Turn the crankshaft in the direction of normal engine rotation without moving the camshafts, until the crankshaft timing mark is again at TDC. This will place all of the belt slack in the timing chain tensioner arm portion of the timing chain/belt. # Install the timing chain tensioner arm and both bolts. Tighten the timing chain tensioner arm bolts to 19-25 Nm (14-18 lb-ft). # Remove the pin from the timing chain tensioner arm. # NOTE: When correctly timed, the crankshaft timing mark will line up and will NOT be one tooth off. Turn the crankshaft two complete revolutions, in the direction of normal engine rotation, to make sure that the timing is still correct. # Tighten the timing chain/belt tensioner bolt to 35-51 Nm (26-37 lb-ft). # Install the RH engine support insulator. Tighten the three nuts to 74-103 Nm (54-76 lb-ft) and the RH engine support insulator through bolt to 67-93 Nm (50-68 lb-ft). # Install the Engine Front Covers . |}

The timing chain is on the front of the engine. Your drive belt tensioner pulley is bolted into the timing chain housing.

u dont adjust the timing chain tensioner if there is slop or play in chain, u need to replace the chain . good idea to replace timing gears at same time while engine is pulled apart

next to the timing chain you will find it in the cover on front of engine where the water pump is mounted they call it the timing chain cover you will have to remove this cover to get at it

You dont, it's an automatic hydraulic tensioner. However eventually the chain and/or tensioner spring will wear out.

It's a load of a job,Remove radaitor, all hoses, pullys, belts,Valve covers, timing chain tensioner and guides. replace pump which is run off the timing chain. Make sure to line up the 3 marks on timing chain so you have correct timing. Reinstall tensioner and make sure it is recharged(all the way out) Turn engine by hand with a wrench to make sure chain is tight and timing is correct(Very important). Reassemble engine in reverse order. This would be a good time to replace the timing chain and tensioner if over 100,000 miles, good luck.

chain. if you hear a clattering noise the timing chain and timing chain tensioner need to be replaced they are usually sold as a kit

There isn't a "timing" on a 400ex or any other atv. There is a timing CHAIN, and timing chain tensioner. -my400ex89 "go big or go home"

Timing is done by chain with an automatic chain tensioner. The accessory drive is a belt located on the front of the engine.

There is no Timing Belt. It has a Timing Chain ,, inside the Engine.

You cannot adjust the tensioner. It is automatic, and takes out the slack of a stretching/aging cam chain. Once the tensioner has fully extended, the only fix is to replace the chain and the part of the tensioner the chain rides on if it is worn.

chcek out your loacl partshouse and get a timing book

Always replace the timing chain, sprockets and tensioner rails whenever you remove the head.

how to install time chain cover on a1997 blazer

A loose timing chain can only be repaired by replacing the timing chain . A loose timing belt means the belt is worn out or the tensioner is worn out. Replace worn parts.

Over time the tensioner may have loosened, in addition timing chains can stretch slightly and this can throw off the timing

how can you use the cam tensioner on a 325 magnum

if its 2002 /2003 with timing chain get the updated tensioner and new chain fitted before it jumps as these do at 50,000!


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