Bent valves, Pistons still ok?

[sherwinz28]

So I found out that my timing belt slipped and I most likely bent some valves (again). I removed the head and it doesn't look bad, in fact I can't even tell the valves are bent. The first time I removed the head you could tell all the valves were bent to hell, it was nasty looking. How can I tell if the bottom end is still good and will hold compression after smacking the valves twice? Can I pour some liquid in the cylinder to see if it holds the liquid? The compression test results were 150 150 150 30. I tried with oil and the results were about the same. I was planning on rebuilding the bottom end with some eagle/wiseco but I've decided to save for a down payment on a house and the bay area ain't cheap so I need to start saving pennies.

Also do you guys suggest using the cometic or the MLS metal gasket? I'm having the head checked at a machine shop so they will most likely see if it needs to be milled but I doubt it since the car only has like 200 miles since the last rebuild of the head.

So basically I'd like to know if the bottom end is still ok after smacking the valves twice?

 

[Dream On]

Put up some pics, but from the sound of the compression test, the first 3 are good at least.

 

[Old Mitsu Tech]

Rarely have I seen pistons damaged beyond usage. I would use scotch brite pads to remove the sharp edges so as to prevent pre-ignition/detonation. I've seen a bunch of bent valves but only 2 or 3 engines which had to have pistons.

If they don't have holes or some really, really bad dings, likely you are ok

Good Luck

 

[huafist]

^^^^
What he said.

Get your head checked for bent valves, Get a new head gasket, and have fun.

 

[steve]

Since you only got 200 miles out of those valves you might want to find somebody to help you get the timing belt on right this time. I'm sure this is getting expensive.

Steve

 

[sherwinz28]

Since you only got 200 miles out of those valves you might want to find somebody to help you get the timing belt on right this time. I'm sure this is getting expensive.

Steve

Well I dropped the head off to a machine shop and we could tell that the corner of almost all the valves touched the pistons as they have what looks like scratches in the corners. It doesn't look like the pistons bent the valves but I'm almost positive the valves are bent. This is definately getting expensive!! This time I'll follow the VFAQ to a T and maybe some other DSMer who lives in the bay can double check for me as I don't even want to do this again.

Is there something else say on the bottom end that could've caused the timing to slip or was it just bad procedure on my part which caused it to slip? Note all components from pulleys to belts were brand new. The dipstick was also popping out when boosting as well. I am running a FRAM PCV and stock dipstick if this may be causing the popping out. Thanks for the help guys.