Piston problems

[wicked-vtr]

Hi guys, thought id put this in here rather than the problems section to get a better/more knowledgable response.

Basically my timing belt has slipped so I whipped the head off this morning. from a quick inspection id say all 16 valves have made contact judging by the notches in the pistons. Will this damage to the pistons make them dangerous to use? I can get pictures of the damage if necessary.
I dont particuarly want to risk a piston giving up at full chat, if its any danger its a good excuse for some wossners anyway

[Gabbastard]

Happened on my old engine dude. It ran fine for another 40k, then I sold it and the guy who bought it has run it for about another 30k with no problems.

Its not ideal, but it wont lead to a failure IMO.

[wicked-vtr]

I thought as much bud, much more material would be removed if I where to have them pocketed, just wanted to make sure before I put it all back together.

Cheers for the reply :y:

[yr51ocw]

like gab says, the marks wont lead to immediate failure. It is likely they will be the initiation point for fatigue but these engines are pretty strong.

[atspeedracing]

pics needed really
- colin.

[blackie_2k5]

agree with colin. Can and most probs will be fine, but without seeing you cant really say, piston pockets would probs be deeper, but you forget they are milled out, not chiselled out by a piston crashing into the valve under load

[atspeedracing]

depends where the damage is. someone in the know will need to see.

its not a competition engine. so can most likely just be dressed with a file etc to remove any sharp edges. long as its cleaned afterwards. but as i say, depends where it is, and how bad. for instance if its caught it right on the edge of the piston crown, its gonna gauge the bore to death. or if the damage is deep enough, crown thickness will be minimal and susceptible to failure.

valve to piston contact varies, so without pics you cannot conclusively advise.

- colin.

[wicked-vtr]

Yeah that's what had me worried blackie, the nicks are smaller than the valve cutouts, but they where done in a way more likely to stress the metal. They are inside the valve cutouts, so nowhere near the crown. After a more thorough look and a bit of a think think i rekon they will be ok tbh, but il get a few pics up anyway.