2010 cHEVY hhr 2.2 L DOES THIS ENGINE USE A TIMING CHAIN?

SOURCE: A picture of timing chain in a 1996 chevy tahoe

http://www.autozone.com/addVehicleId,2314001/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c1528008ef16

Harvey N Tawatao

• 3854 Answers
• Posted on May 04, 2009

SOURCE: how to replace a timing chain 2000 chevy cavalier

I am familiar with that vehicle but generally with timing chain replacement, the engine needs full access for pulley and cover removal and in some cases the cylinder head requires removal.
Generally timing chains last so that they only need replacement at engine overhaul and it is not an economic proposition to have to replace a chain unless some relative degree of engine work is also required at that time. 

Engine timing chains generally have a tensioner on them which maintains tension, but some chains can wear significantly and cause timing cover to be "ground away" because of "slop".

If the engine is making the noisy rattle of the timing chain against the cover etc, I would schedule a top overhaul (head, machine, test and valve grind) with the chain replacement dependent on mileage with the degree of action.

Some simple simplex timing chains (type of chain similar to motor bike chain) may be replaced without dismantling the engines but I would expect your chain would be a "duplex" dual sprocket type, these are most common. 
These chains are not generally expensive but replacing them can involve a fair amount of work. 

Good Luck and hope this helps, Others will have different ideas.

SOURCE: DOES THE 95 CHEVY LUMINA 3.1 ENGINE USE A TIMING

it uses a chain not a belt and does not require changing like the belts, unless you hear noise.

SOURCE: chevy 2000 blazer when should i change my timing chain?

Not very often if ever. It is mileage that wears it and it is possible to go 200k or more. Usually shows up as timing issue when bad.

SOURCE: timing alignment for 2200

2001 chevy cavalier 2.2L VIN-4 If chain broke or jumped: Remove timing cover(helps to remove two bottom studs on cover that pass threw oil pan use the two nuts on them as jam nuts on the studs). Put #1 cyl. t.d.c with crank. timing mark pointing @ center of the chain tensioner. Remove cam shaft pulley remove chain, reinstall pulley and turn cam shaft until cam shaft mark also points to center of tensioner. (I removed valve cover to make sure the two push rods for #1 cyl. relaxed (They turned with two fingers) Install new parts as needed.Connect battery Test run for 5 sec. with covers off.Disconnect battery. Put everything back together.Go to http://www.jasperengines.com/pdf/GM2.2TimingTB.pdf to see timing marks and alignment.