Oldblue

That’s why RJ mentioned the magnet in his write up.

Flyinmech

I am just dumb, but the hole is smaller that the bolt

Cat Man HHR

How can that be, look at the picture.
Did you open and read what I posted in line #8 ?

Silverfox

I am looking at the picture of the OE bolt you show removed. Small Threads on the end only?
New bolt …Large threads and No threads on the end?
2 different configurations?
Same question

Also … Is this bolt shown for the 2.2L and 2.4L engine only or will it fit the 2.0L SS ?

Silverfox

Oldblue

These bolts are common with all three engines, the shank on the end fits into the front guide upper bolt location, but it doesn’t have threads nor does it go into the threaded hole inside the engine, it is secured by the threads in that outside part , see post #3

https://www.chevyhhr.net/forums/main...il-wear-59951/

RJ_RS_SS_350

The link Cat Man provided explains it pretty well.

Oldblue

Yes, Dorman jumped in board a few years after Mike over in the Cobalt site was making this design .

Cat Man HHR

Thank you Randy.

Cat Man HHR

The bolt you take out will have threads on the end.
The replacement doesn't have any.
The smaller part of the "stud" fits into where the threads are in the block to support the new part.
Otherwise the bolt has no real support.

Oldblue

Actually the smaller part fits into the guides upper bolt hole, this way if the OEM bolt has broken off , you do not need to drill out the stub .

Mr Brandt was very good in designing this