99 sunfire timing chain and gears repair 2.2 L

[rjh1]

need to do timing chain and gears  99 sunfire 2.2 L Have loud knocking sound from that area ....car has 99 thou miles on it..how extensive a job is it....any special tools needed...and is this a common issue...need picture break down....of what all needs removed to do the job

Thanks

[Jim Fairbanks]

It's not to bad...It books out at about 5.0 hrs....6.0 with AC........Jim...........Timing Chain and Sprockets Replacement Removal Procedure
Tools Required: J22888-20 Crankshaft Sprocket Puller

Caution : Be sure the ignition key is in the off position, unless otherwise instructed in these procedures.


Disconnect the negative battery cable.
Remove the crankcase front cover. Refer to Engine Front Cover Replacement. See: Timing Cover\Service and Repair
Align the crankshaft sprocket and camshaft sprocket timing marks with the alignment tabs on the timing chain tensioner. Important: Before removing the timing chain, measure the distance between the hole in the bracket and the unworn surface of the timing chain tensioner shoe. If the distance between the hole and the unworn surface of the timing chain tensioner shoe is more that 8 mm (0.314), replace the tensioner, timing chain, and both sprockets.

Remove the timing chain tensioner bolts.

Remove the camshaft sprocket bolt.
Remove the camshaft sprocket and timing chain.
Remove the Torx bolt and the tensioner assembly.
Remove the crankshaft sprocket using J22888-20 Tools Required: J 5590 Crankshaft Sprocket Installer
Installation Procedure

Install the crankshaft sprocket using J 5590. Make sure that the crankshaft sprocket is seated against the crankshaft.
Install the timing chain and install the timing chain tensioner.

Compress the timing chain tensioner spring.
4, Insert a cotter pin or a nail into the hole in the tensioner to retain the timing chain tensioner shoe.


Install the timing chain tensioner. Do not tighten the timing chain tensioner bolts.

Align the crankshaft timing marks with the tab on the timing chain tensioner.
Align the camshaft timing mark with the tab on the timing chain tensioner. Notice : Use the correct fastener in the correct location. Replacement fastener must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surface unless specified. these coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tighting sequence and specification when installing fasteners in order to avoid damage to the parts and system.
Install the camshaft sprocket and install the timing chain. Tighten: Tighten the timing chain tensioner bolts to 24 N.m (18 lb ft) .
Tighten the camshaft sprocket bolt to 130 N.m (96 lb ft)


Remove the cotter pin or nail from the hole in the timing chain tensioner.
Install the crankcase front cover. Refer to Engine Front Cover Replacement. See: Timing Cover\Service and Repair
Connect the negative battery cable. Tighten: tighten the bolt to 16 N.m (12 lb ft) .
 


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[the_graze]

i am trying to replace mine but there is a hub assembly on crankcase pulley after you take outside pulley off looks like some type of keyway is there a special tool i need to get this hub off?

[Jim Fairbanks]

There should be 3 threaded holes in the pulley...You might need a puller to get it off...Jim

[NickD]

Here are some of the tools listed in the shop manual

J-24420-c harmonic balancer puller
J-29113 Crankshaft pulley installer
J-5590 Camshaft gear installer
J-38122-A Harmonic balancer holder
J-43655 Camshaft sprocket holding tool

Crankshaft pulley bolt is only 77 ft lbs on this engine, but the entire engine wants to turn with it, an air impact wrench really helps, or using an old fan belt tied in a knot with strong leverage with a bar against it.  Also putting a rope in the front cylinder helps.  Use plenty of PB blaster on the joint between the pulley and the pulley.  The pulley is a long bolt same size as the original with a nut on it, can generally find this locally.  Pipe can be used to tap on the camshaft gears if they need replacement, I can hold my own camshaft sprockets.

Some brain decided that with combination, open, or boxed end wrenches, the smaller the size, the shorter the wrench, try and reach a tight spot with those wrenches, have to shop around to buy extended wrenches.

Always have to buy special purpose tools, have a full tool box loaded with those, can't even remember what they are for.

[the_graze]

had timming chain repaired and its not my problem so thank you for your response i have posted a new post to seek help thanks all!!