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Hi,

I have a 2006 HHR 2.4L engine that I discovered had a bolt that was sheared off by a broken timing chain.

Got the installation almost done when I discovered the broken bolt. Trying to figure out what to do to either fix or remove what is left in the block in order to install the new bolt.

I have a screw extractor set but I can't drill out the old bolt enough to make it catch. I thought about just completely drilling out the hole and using JB Weld to rebuild the hole but I'm not sure that will hold on a hot engine soaked with oil.

Any one with an idea would be appreciated.

RJ_RS_SS_350

Why can't you drill it out more?

PulpFriction

Not sure but I think you need a smaller drill bit.

Oldblue

I suggest, find the centre of the broken bolt, use an 1/8” drill bit , Dewalt has a package of two , drill into the bolt 1/2” use an easy out to extract the bolt.

you might find it easier to access with the drill if you lower the engine on a floor jack and a block of wood under the oil pan.
I haven’t seen the bottom bolt break off in a while, the intake balance shaft bolt head is pretty beaten up too.

firemangeorge

The OP says “broken” timing chain. That bolt may not be the only problem. The engine may have bent valves if the old chain was actually broken.

Oldblue

In the photos the timing chain looks intact, the guide bolt is MIA.

donbrew

Go to a NAPA and get a 1/8 (or a size smaller than you are using) left handed drill bit. The tool made for the job. It is the kind of thing you have to ask for.

firemangeorge

I thought the photos were with the new chains installed.

greg8453

Where's the head to that bolt? Is it a hold down for a guide?

PulpFriction

Two bolts for the front guide. It’s the bottom one. It’s usually the upper bowl that causes trouble.

I’m assuming the OP has already removed the guide.