Originally Posted by jr's3800

Ok..

After tinkering with a few 2.5 Iron dukes, there were 2 versions, one had timming gears which liked to strip and jump time.... Gm later changed that and went to a chain... I have seen a tensioner or 2 break and rub a hole in the timming cover, but none of them ever jumped time...

Now with the 2.2, I have never seen a single one jump time, or have a timming chain break... I can't say that its impossible, but very very rare... Its actually more common that a 2.2 will have head gasket trouble, and usually towards the rear of the block... The correction is to remove the head and have it straightened and possibly shaved if needed and then reinstall with a new head gasket... Most I have seen go 100,000+ before they have any trouble... I have seen a few go before that, but you have to look at how many 2.2'* are on the road as well...

I'm not sure what kind of damage was done to aunts engine... Its possible that it may have locked up... But the question why still remains... Even if it did jump timeand crushed a valve the chances are that it would not have sized up, it may have a point where it will no longer turn due to a valve being crushed in there but not totally locked... I would have been the first person pull the valve cover off to see if any of the vales were damaged... On a 2.2 if you had found a loose looking rocker( very loose ) then chances would be you would have found you crushed valve...

Just make sure she never takes her car back there again... I am hopeful that she will get a lot of life out of the newer 2.2