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Ford Truck Club Forum > GARAGE TALK > Garage Talk: Shop Class 101



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  #1  
Old November 30th, 2011, 10:10 AM
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Exclamation How To Replace the Timing Chain on a '97 4.6L

things needed

Cam Positioning Tool
T91P-6256-A Cam Positioning Tool Adapters
T92P-6256-A Camshaft Holding Tool
T96T-6256-B Camshaft Positioning Tool
T96T-6256-AR

Removal

Remove the engine front cover; refer to the procedure in this section.

Remove the crankshaft sensor ring from the crankshaft (6303).


On WEP engines, use the Camshaft Positioning Tool to position the 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 Cam Positioning Tool and the Camshaft Positioning Tool Adapters on the camshaft.


On WEP engines, install the Camshaft Holding Tool on the camshaft.


Remove the LH timing chain tensioner bolts and the LH timing chain tensioner.


Remove the RH timing chain tensioner bolts and the 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.
1.Remove the LH timing chain guide bolts.
2.Remove the LH timing chain guide.
3.Remove the RH timing chain guide bolts.
4.Remove the RH timing chain guide.


SAME On WEP engines, remove the chain guides.
1.Remove the LH timing chain guide bolts.
2.Remove the LH timing chain guide.
3.Remove the RH timing chain guide bolts.
4.Remove the RH timing chain guide.

Installation

CAUTION Timing chain procedures must be followed exactly or damage to valves and pistons will result.


1.Compress the timing chain tensioners (6L266).
2.Release the lock assembly on the timing chain tensioners.
3.Compress the timing chain tensioners.


1.Install the retaining pins.



On REP engines, install the timing chain guides.
1.Position LH timing chain guide.
2.Install and torque the LH timing chain guide bolts.
3.Position the RH timing chain guide.
4.Install and torque the RH timing chain guide bolts.


SAME On WEP engines, install the timing chain guides.
1.Position the LH timing chain guide.
2.Install and torque the LH timing chain guide bolts.
3.Position the RH timing chain guide.
4.Install and torque the RH timing chain guide bolts.


1.Install the timing chain/belts (6268) and crankshaft sprockets (6306).
2.Slide the crankshaft sprocket onto the crankshaft, aligning the copper link on the timing chain/belt with the dot on the crankshaft sprocket.
3.Position thetiming chain/belt over the camshaft sprocket, aligning the copper link with the dot on the camshaft sprocket.


1.Make sure that the copper marks on the timing chain/belts are lined up with the corresponding dots on the crankshaft and camshaft sprockets.


2.Make sure that the camshaft sprocket keyway is 90° from the cam cover mounting surface.


3.Make sure that the RH timing chain sprocket is on the front of the LH timing chain sprocket with the hubs facing each other.


4.Position the LH and RH timing chain tensioner guides on the dowel pins.


5.Position the RH timing chain tensioner and install the timing chain tensioner bolts.


6.Position the LH timing chain tensioner and install the timing chain tensioner bolts.


7.Remove both the RH and LH retaining pins from the timing chain tensioners.


1.On REP engines, remove Cam Positioning Tool and the Camshaft Positioning Tool Adapters on the camshaft (6250).


2.On WEP engines, remove the Camshaft Holding Tool from the camshaft.


3.On WEP engines, remove the camshaft positioning tool from the camshaft.


4.Install the crankshaft sensor ring on the crankshaft.


5.Install the engine front cover

Check the following components for part number orientation.

Item Part Number 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


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  #2  
Old December 10th, 2011, 09:17 PM
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JSoko ,you did a great job on research. I can borrow the tools and do this, but it would take me 10 times longer to do it than a professional. Its just not worth the aggravation and time for me to do.If i decide to put a band aid on her, ill let my buddy John do it.He has been a Ford man all his life as well.He has a great shop here in Cantonment called MCfaddens Mustangs.He caters to all Ford products even has a Ford tractor to cut grass and plow his garden.

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  #3  
Old December 10th, 2011, 09:56 PM
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I completely understand

I would not attempt to do it either, without that eye that could spot a problem by sight or touch


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  #4  
Old January 12th, 2012, 11:43 AM
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Exclamation

Quote:
Originally Posted by JSoko View Post
on REP engines, rotate the crankshaft until both camshaft keyways are 90° from the cam cover surface.
I have a question on this statement. Is this also the case for a WEP engine? Should the cam timing marks be at 90 degrees or should the left hand side be positioned @ 11 o'clock as stated in the Haynes manual? The reason I ask is I had to replace head gaskets on my ford and i also sent the heads out to be machined and new valve seals installed. so using the cam locking tool was not an option. I have a friend who works at a Ford dealership and his repair manual states they should both be at 90 degrees. after putting the vehicle back together it runs rough at idle and has some loss of power. any way you could verify which is right and which is wrong?

thanks Mark
  #5  
Old January 12th, 2012, 08:13 PM
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JSoko JSoko is offline

 

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Slide the crankshaft sprocket onto the 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 copper marks on the timing chain/belts are lined up with the corresponding dots on the crankshaft and camshaft sprockets

Make sure that the camshaft sprocket keyway is 90° from the cam cover mounting surface.


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Last edited by JSoko; January 13th, 2012 at 08:55 AM.
  #6  
Old January 13th, 2012, 08:56 AM
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heres a good video from FORD, watch the gear install





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  #7  
Old January 13th, 2012, 08:58 AM
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heres part 2





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46l , chain , replace , timing

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