Timing Chain Tensioner
 

Hi Everybody
I have a 2011 HHR with the 2.2 motor and I think I have to replace the chain tensioner. If I use the vehicle everyday, I hear no noise when starting the car. If the car sits for a couple days, I hear a noise coming from the engine that lasts for 2 to 3 seconds. I've been reading up on which one to purchase and how to install. My question is, do you really have to remove the valve cover to extend the plunge. Some say the plunger extends when you start the car. Some say you have to extend plunger before starting the car. Which one is true? Does anyone know how the replacement is explained in the GM Service Manual? I have no GM Manual for the car.
Thanks for any help
Dano

If you purchased the same one I did for my 06 2.2, it's automatic and will set itself.

Just got the same one in for my daughters 06 Cobalt, will install it soon. Price on those has dropped over the years.

All 2011 have the "updated" part. What is going on is that the adjuster can't adjust the chain any farther. A new adjuster is not the real fix, you might be lucky but don't count on it.

I do have the updated adjuster, was thinking it failed or worn out. Sounds like i need to replace more then the adjuster. Is it a hard job to replace chain ,gears and guides?
Thanks Again

I just went through the same exercise with my 2009 2.2L VVT HHR. I got the same noise for the first few seconds and replaced the original tensioner, which was of the new design. Since I only have 51,000 miles, I wrongly figured that there is no way that the timing chain/guides could be worn this soon. I pulled the valve cover, replaced the tensioner, hit it to set the tension, which did not appear to be loose after tensioning. Replaced all of the gaskets and seals and buttoned things up. It did absolutely nothing for the rattling noise at cold start up. I guess that running Mobile 1 since new is not the answer for a long life with the 2.2L engine. :confused:

you forgot time... a lot of time for someone doing it their first time lol
other things to consider doing at the same time
oil change
coolant flush
some have mentioned in other threads that it isnt a bad idea to replace the balance chain at the same time, considering your right there already.

Unfortunately I was just focused on changing out the tensioner and didn't look for other issues. Is a broken front guide a common occurrence? I did notice that the chain was tight after I tapped the new tensioner.