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Old 05-05-2014, 03:58 PM   #1
Chano1215
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Default How to set the timing

Pulled the cams and the head, new head gasket and timing set ready to put back together. Crank has been rotated and I did not set anything before I pulled the chain. How do I realigned everything before I put it back together.
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Old 05-05-2014, 04:14 PM   #2
RobertGary1
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Default Re: How to set the timing

Quote:
Originally Posted by Chano1215 View Post
Pulled the cams and the head, new head gasket and timing set ready to put back together. Crank has been rotated and I did not set anything before I pulled the chain. How do I realigned everything before I put it back together.
Are you asking about the entire procedure or just the alignment marks. I find that the exhaust cam always looks off to me. Just make sure you can run a drill bit through the hold in the cam sprocket through the alignment hold on the cover. If that works the cams are aligned.

Don't move the cams around unless the crank is at 3oclock. Otherwise you'll collide and damage the valves.

-Robert
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Old 05-05-2014, 04:16 PM   #3
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Default Re: How to set the timing

Quote:
Verify that the crankshaft is positioned at 90 degrees past top dead center (TDC). The crankshaft keyway and sprocket must be aligned with the cylinder block main bearing cap split line, as viewed from the accessory drive end, to prevent piston and valve damage.




Notice
Do not torque the camshaft retaining bolts against the 3/16 in. timing pins as it will damage the cylinder head.


Install the camshaft timing gears, the retaining bolts and washers. The letters FRT on the sprockets must face forward, away from the cylinder head. Wrench flats 24 mm are provided to hold the camshafts from rotating while torquing the bolts. Tighten
Tighten the camshaft sprockets-to-camshafts to 100 Nm (74 lb ft).





Bring the camshafts up to the number one TDC by rotating the camshaft and sprocket until the timing pins 4.77 mm (3/16 in) drill can be installed. Wrench flats are installed on the camshafts to assist with rotation.



Rotate the crankshaft counterclockwise, as viewed from the accessory drive end, until the number one cylinder is TDC. The crankshaft sprocket timing mark will align with cylinder block timing mark.




Caution
The camshaft can rotate during timing chain installation when the timing pins (4.77 mm (3/16 in) drill) have not been installed. Do not place fingers between the camshaft sprockets and the chain during the timing chain installation.


Place the timing chain over the camshaft sprockets and under the crankshaft sprocket.




Notice
Excess slack in the chain must be kept to the chain tensioner side (movable guide) of the cylinder block when installing the timing chain or the camshaft sprockets will not be correctly timed to the crankshaft sprocket.



Important
Two separated black link plates align the pip marks on the camshaft sprockets and another 2 paired link plates align the crankshaft sprocket tooth that is located at the six o'clock position. The pip mark on the crankshaft sprocket must be aligned with the timing mark on the cylinder block.


Important
Alignment of both timing pin holes, crankshaft sprocket pip mark with cylinder block mark, black links with camshaft and crankshaft sprockets must be correct to make sure the engine is properly timed.


Ensure that the black colored link plates are located over the pip mark on the cam sprockets only. The crankshaft sprocket tooth must be pointed directly downward at the 6 o'clock position between the 2 silver colored links. The pip mark on the crankshaft sprocket will be aligned with the timing mark on the cylinder block.




Important
The timing chain should be snug against the fixed guide.


Install the fixed guide. Tighten
Tighten the timing chain fixed guide-to-block to 26 Nm (19 lb ft).

Install the pivoting chain guide. Inspect for clearance between the block and the head. Torque the bolt and ensure the guide pivots freely. Tighten
Tighten the timing chain pivot guide-to-head to 26 Nm (19 lb ft).


Important
The camshafts must be positioned fully forward prior to bearing cap installation.


Install the 2 forward remaining camshaft bearing caps and timing chain guide. Tighten
Tighten the camshaft bearing cap-to-head (LL0) to 14 Nm (10 lbs ft).

Retract the tensioner plunger and pin the ratchet lever using a 3.18 mm (1/8 in) or No 31 drill. Install the chain tension and torque the 2 bolts. Remove the drill and allow the tensioner plunger to extend. Tighten
Tighten the timing chain tensioner-to-block to 19 Nm (14 lb ft).

Verify all timing marks for accuracy. Remove the camshaft timing pins.
For a DOHC. Looks nicer in the FSM display I have
...
The proper way to fix a S-Series automatic is to replace it with a 5spd O:)
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Old 05-05-2014, 04:37 PM   #4
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Default Re: How to set the timing

Thanks for the step by step instructions. Next step torq the head install the cams then follow your procedures.
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Old 05-05-2014, 06:28 PM   #5
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Default Re: How to set the timing

Be sure you use these values and procedure for the head. Both dohc and sohc are posted here and they are different.

Clean the head bolt holes with a fiber brush and blow out with compressed air. Clean the head and block mating surfaces with acetone. Set your new gasket on the block in the correct position so the oil port is not blocked. Carefully set the head on the gasket and do not scratch the head or block. If the bolts seem to be oily when you pull them out of the box wipe them off with a clean dry rag and don't leave any lint on them. Now screw all the NEW head bolts in by hand and torque them in order and stages to the 48ft-lb final value.

DOHC head torquing procedure

Initial dry bolt torque in sequence to 48ft-lb following the torquing pattern in stages to 20ft-lb, 30ft-lb, and final 48ft-lb. This establishes the proper clamp load on the gasket.

This is followed by removal in about 1/4 turn in sequence until loose.

Bolts washers, threads and bolt heads are oiled with clean engine oil and reinstalled finger tight.

Torqued in sequence to 22 ft-lb then 37ft-lb and then additional 90 degree turn.

The 90 degrees is important so do not guess at the 90 degrees. You can eyeball it and use a 1/2 drive breaker bar and make the 90 degree turn in a single smooth motion.

If this is not followed the new gasket will end up leaking.

Torquing sequence
intake side
8-4-1-5-9
7-3-2-6-10
exhaust side

SOHC head torquing procedure

Initial dry bolt torque in sequence to 48ft-lb following the torquing pattern in stages to 20ft-lb, 30ft-lb, and final 48ft-lb. This establishes the proper clamp load on the gasket.

This is followed by removal in about 1/4 turn in sequence until loose.

Bolts washers, threads and bolt heads are oiled with clean engine oil and reinstalled finger tight.

Torqued in sequence to 22 ft-lb then 33ft-lb and then additional 90 degree turn.

The 90 degrees is important so do not guess at the 90 degrees. You can eyeball it and use a 1/2 drive breaker bar and make the 90 degree turn in a single smooth motion.

If this is not followed the new gasket will end up leaking.

Torquing sequence
intake side
8-4-1-5-9
7-3-2-6-10
exhaust side
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Old 05-05-2014, 06:59 PM   #6
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Default Re: How to set the timing

Thanks again
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Old 08-04-2014, 01:07 PM   #7
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Default Re: How to set the timing

Very helpful procedure. I was wondering why the black links for the crank are at the 6:00 position when the crank sprocket is at the 12:00. From past experience the timing marks line up with marks on the chain. Needless to say I almost made a big whoopsie.
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