Setting timing after head rebuild

[Sportyb24]

So what is the procedure to setting the timing once the head has been rebuilt,which way should the cams be in place any markings to help me or write ups? Been searching but no luck any help would be awesome!!! Thanks in advance!!

[Sportyb24]

No input from anyone??

[jimzdat]

Well, it depends - what year is your car? There was a significant change made to the engines over the lifespan of the Aveo, and the procedure is different.

This is the procedure for the later model:
https://drive.google.com/file/d/0B74...JOY05nUDg/view

For the earlier model: (note, the pics aren't working it seems, but it does a decent job of describing the position things should be in)
http://www.aveoforum.com/forum/f94/t...rite-up-10284/

I'm assuming you are putting a new timing kit in this engine (if not, I would highly recommend it) - the last half-dozen or so timing kits I've purchased for various cars have all come with vehicle specific documentation that shows all the marks and relevant positioning; make sure they didn't tuck the paperwork in the bottom of the box.... If you don't have the kit, go buy one before moving forward; even if it was replaced 2000 miles ago, it's considered poor practice to reuse a timing belt after it's been tensioned and then removed.

[Sportyb24]

2006 Chevy Aveo

[Sportyb24]

Well, it depends - what year is your car? There was a significant change made to the engines over the lifespan of the Aveo, and the procedure is different.

This is the procedure for the later model:
https://drive.google.com/file/d/0B74...JOY05nUDg/view

For the earlier model: (note, the pics aren't working it seems, but it does a decent job of describing the position things should be in)
http://www.aveoforum.com/forum/f94/t...rite-up-10284/

I'm assuming you are putting a new timing kit in this engine (if not, I would highly recommend it) - the last half-dozen or so timing kits I've purchased for various cars have all come with vehicle specific documentation that shows all the marks and relevant positioning; make sure they didn't tuck the paperwork in the bottom of the box.... If you don't have the kit, go buy one before moving forward; even if it was replaced 2000 miles ago, it's considered poor practice to reuse a timing belt after it's been tensioned and then removed.

2006 and yes replaceing everything from valves to water pump..

[jimzdat]

OK, I believe that is the older style - try this link:
http://www.litensaftermarket.com/fil...ure_979143.PDF

I also got this from the O'Reilly First Call site, and just uploaded it to my own site (only shops can access First Call):
http://www.jimzdat.com/docs/aveotb.pdf

[Sportyb24]

Yes it's a first gen but the info I need is how to set the cams in place so they match with the gears correctly.. so I don't screw up the timing when the cams are installed.. don't know if the cams themselves are marked ?

[jimzdat]

Cam sprockets are aligned to the camshaft using an alignment dowel; just put the sprocket on the cam temporarily, and make sure the timing marks are pointed towards each other when installing the cams - they can be a little off when installing the cams without damage, as long as the crank isn't turned. Due to the valve springs, they won't just set in there and be perfect; you will have to force the cams slightly to get them aligned - I've used smooth-jaw vice-grips to hold the cams in position while installing belts - just go slowly and don't force anything; if you feel mechanical resistance at any time, stop and reevaluate.
Once the cams are in, then install the oil seals, reinstall the sprockets, and align all timing marks - then install the belt and tensioner, and set everything accordingly