Bad weekend with my "reliable driver" valves and pistons

[90turbotsi]

So my 6 bolt swap in my 99 GST has been done since early this year and seen a good +6,000 miles. I bult a 6 bolt, 2G pistons on 1G rods, all arps, crower valve springs and retainers, ferrea SS valves. Its been flawless the entire time, well was... So the other night I was driving home from dinner and I notice a belt squeel. I knew the PS belt was a bit loose so I figured it was that. As I drove further it started smoking a bit, but very very lightly. I pulled over and looked around. It seemed the AC belt was the reason and I figured the tensioner (since it had been left in the parts washer too long) was causing the problems in conjunction with the belt. I figured home was only 5-10 more minutes and I could deal with it the next day. 1-2 miles down the road and the car stumbles on it self, breaks up and cuts off. Then boom, the loudest backfire ive ever heard and it dies. I open the hood and the timing cover is soo hot its almost melted, rip it off and the belts shredded to hell!
So my perfect motors trashed due to a timing belt failure, with 5-6K on it... im just a tad bit heated at the moment.
I pulled the head today and as expected lots of fun stuff. The rockers were all knocked and fell down into the head, the cams are chewed up nicely...thank god they were stockers. Once the head was off yup all 16 Ferrea's were bent and there were 16 nice imprints in my new 2G pistons.
So my best guess is this... the rear timing cover (wing) on the head. It has 2 10mm's that hold it on and are there to PREVENT stuff from going in are at this point MIA. My best guess is they decided to meet up with my timing belt and had some fun. So in that case I will be very lock tight happy in the future on those.
I need your guys honest opinions at this point. Do i smooth out the pistons and redo the head or do I replace the pistons. Im anal for perfection and its going to bother me that they are not right but I really would rather be driving my 99 GST around daily then my F350 Quad Cab dually . In the case I need to I can replace the pistons but if it would work out to just leave them in there I will.
Also if I am to take out the pistons would it be safe to reuse my 6K old bearings and rings or should they be relpaced again as well?
P
Thanks in advance!

 

[BISHILVR]

I would leave it alone, most 4g63's running around have piston marks on them from a past encounter. If you remove the pistons, you make junk of the rings period. And if you take the old bearings out, then whats $30 to replace the rod bearings with new? Like I say though, I would just leave it be since it's pretty new anyway and hardly broken in.

 

[elfroggo]

I would say that it depends on how bad the impressions/impact damage is.

Probably try to clean up the piston best you can. Sharp edges heat up more and can lead to detonation.

 

[90turbotsi]

I think for the lack of time I have right now working full time and being a full time college student... plus the fact the damn motor has 2 - 3 oil changes on it I will clean up the tops and put it back together. Worst case I can tear it down in the winter and such. I mean yea timing belt accidents happen but what makes me soo furious is the motor was fresh out and soo perfect.

the head tho, thats another story... i need lots of work there.

Thanks everyone

 

[90turbotsi]

... oh and the bearings... im a OEM fan so they are like $70 ish oh well that can wait until i decide to redo it if needed. Its a driver car not a race car so should be ok

 

[BISHILVR]

You will be fine! Good luck.

 

[DoyoFCT]

make sure that you have the oil pan bolts in the right location. there's two short ones that go into the bottom of the front case. If you install the longer oil pan bolts it will cause a groove in the timing belt causing pre-mature failure. I've also seen someone drop a bolt, into the timing cover and tear up the belt. (not very pretty ) the marks are fine, i cant even count how many motors ive fixed with broken timing belts and marks in the pistons. sure maybe it causes a slight hot spot in the piston, but generally if you take a stone and get the rough edges smoothed out it will be fine.

Goodluck