Timing cam shafts (TDC?)

[Milo89]

I just got a new head with camshafts. How do I make sure they are tdc to install the gears? 2009 1.6L LXV

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[slayerized6]

-Rotate the crankshaft until the timing mark in the crank lines up with the mark on the block.
-Check for TDC on the #1 cylinder. You may have to complete one more turn of the crank to get TDC on cylinder 1
-The camshaft gears only install one way as there is a mounting lug on each camshaft
-Rotate both camshafts so the timing marks face each other
-Use a camshaft locking tool and install timing belt

[Deano]

Just a note. The 2009-2011 Aveo engines don't have keyed camshafts. You need a special camshaft locking tool set. A tool is needed to lock the camshaft gears in alignment. Plus another special locking tool is required at the opposite end of the camshafts to lock the camshafts themselves in perfect alignment. Unless you have those 2 special camshaft tools, you won't be able to do the job.

Deano

[Milo89]

I have the gear lock. What is the other tool I need?

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[Milo89]

Something like this?

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[Deano]

Yes, that's the sort of one i was referring to for locking the cams in alignment. All the versions that i've seen is a flat plate that slips into the two cam slots. The picture you show, i haven't seen that one before. But it accomplishes the same thing. Interesting.

Deano

[Milo89]

This one?

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[Deano]

I don't know if the tool you show above is compatible with the 2009-2011 Aveo engines. There are many different versions of the camshaft locking tool that will work for the 2009-2011 Aveos. As long as the tool you get is compatible with the LXV or LDE or LLU or 2HO or Z16XER or Z18XER, etc, etc, you're good to go. The GM/Helm Service Manual shows KM-6628-A as the GM-preferred tool. But it's expensive. I bought a cheaper knock-off version from Laser in the UK, Laser 5549. As long as the tool you get is compatible with the 2009-2011 engine type, and it's a price you're comfortable with, that's the main thing.

Deano

[Milo89]

What is the right torque for the cam gear bolts? My chilton manual says 70 then 45 degrees and something else. But it bent the tool around 50.

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[Deano]

My GM/Helm Manual states for the 2009-2011 LXV, LDE, LLU, 2HO engines the following torque spes:

a) Camshaft Adjuster Bolts: 47.9 lb ft + 120 degrees + 15 degrees
b) Camshaft Sprocket Bolt Caps: 36.8 lb ft
c) Camshaft Sprocket Bolts: 47.9 lb ft

In answer to your question for the gears, I believe you should be torquing them as per c). That is 47.9 lb ft.

Deano