Piston smashed spark plug..rebuild??

[preston145]

Ok so here we go. I'm not really a newbie to this stuff but i'm not an expert and yes i have researched quite a bit on this subject and still nothing quite matches mine and i need some advice. I recently had a burnt exhaust valve and had a friend fix that. Not even a day went by before it messed up again. So right now it wont even turn over. i believe it is locked up. I take out all the spark plugs adn when i get to the last one on the right it is smashed beyond recognition. I have some people telling me I may have dropped a wrist pin and there maybe some valves gone as well. I was thinking about buying a rebuild kit for the bottom end just to be safe. I have the 6-bolt swap that is in it now but would it be worth it to be rebuilt. I'm thinking new everything in the lower end. Now what should i do with the head? I mean the spark plug stripped the threads. I wasn't even running it hard when it happened. At first it turned over and would crank but made a clicking sound. I thought it was a lifter at first but then it wouldnt even turn over and the starter was making a crazy noise. i even went a bought another starter and it still made a funny noise like it wont even turn the fly wheel? Any ideas what happened and do you think i should get a rebuild kit because im in college and trying to save money. Thanks so much.

 

[hopwoodp]

Pull off the head and tell us what you see. Something similar to that happened to me. It turned out the mechanical timing was off and my #3 valves decided to tap dance on my piston and the valve studs ended up punching through my head and my piston cracked in three places.

You can't really tell much without pulling the head off. I would look at a rebuilt block and possibly a rebuilt head(depending on the condition).

 

[preston145]

See thats the only problem I'm outta state in college and i can't just go home to pull the head. But i did shine a light down there and didnt see a hole in the piston but more of shavings from the spark plug everywhere. Do you think my crank may have suffered? I found a great rebuild kit for my car for around 350 bucks and thats everything. Also what did you do? Did you just replace that one piston, or do a rebuild with pistons rins and all just to be safe? I just dont know what i need to do and how much it would run me? My cousin owns a machine shop so I'm not to worried on the labor for the head.

 

[preston145]

And yes I'm interested in your block so how much would you charge for it? Do you have a head as well? thanks!

 

[hopwoodp]

See thats the only problem I'm outta state in college and i can't just go home to pull the head. But i did shine a light down there and didnt see a hole in the piston but more of shavings from the spark plug everywhere. Do you think my crank may have suffered? I found a great rebuild kit for my car for around 350 bucks and thats everything. Also what did you do? Did you just replace that one piston, or do a rebuild with pistons rins and all just to be safe? I just dont know what i need to do and how much it would run me? My cousin owns a machine shop so I'm not to worried on the labor for the head.

My engine never ran again. It turned out that the guy who built it had no clue what he was doing or didn't car. He didn't even tighten down the hydrolic tensioner. The head is now a paper weight. The block needs to get re-bored and pretty much a full rebuild. Not to mention that the topline oil pump didn't do too well.

This stuff really does take up alot of time. It sucks when it happens. I am at two motors later and it is still not fully drivable.

I had one motor that was so messed up, I hit boost at 1,000 rpm (bad Cam angle sensor)on a 20g.

This is just the beginning of a new thing for you to carry with you later on. It sucks but, you will have to deal with it sooner or later.

Try to find someone close to you that knows dsm's and have them take a look at it. I am sure there is someone close to you that can help you out.

 

[absolute_DSM]

im in college and trying to save money. Thanks so much.

Bad time to deal with DSMs.

Youre going to have to get that head off to find the damage really done.

 

[preston145]

Yes it definately is a badtime. I'm wrestling in college and i basically signed my soul over when i signed my letter. Well is there a chance nothing in the lower end got smashed? And ill try to find someone close to Augusta to help. thanks luckly im only an hour away from home though. haha Ill go home and see what i can do this weekend

Oh and i was wondering if anyone else has expierenced this. If so, what did you do?

 

[Locke]

Lots of people have experienced this. The first thing they did was to pull the head and inspect the damage. (as mentioned previously)

 

[Defiant]

I have some people telling me I may have dropped a wrist pin and there maybe some valves gone as well.

Um, no. That's not it.

 

[preston145]

Then what do you think? I'm at a lost.

 

[toyotaturbo]

I'm thinking that you dropped a valve right into that cylinder. You may have broken the valve stem attached to it and the valve is pinging around in that cylinder. You most likely didn't do any damage to anything below the piston, but the piston is probably done for. I had the same thing happen to me, and the engine wouldn't turn at all. Took the head off, and had valves all over the place. 16 bent ones. 5 of them not even inside the head anymore.

 

[silver bullit]

You need to check the cylinder walls, for marks, groves, nicks if any block is toast.

And the head is done, piston is to.

Post a pick of the plug,

Also if you open the valve cover and take picks of the springs and retainers on intake and exhaust, it should let you know how many if the cams or removed or the engine is hand cranked over and the valves no longer return to the cam.

 

[preston145]

alright, well when i go home this weekend ill make a trip out there and take my valave cover off and take a couple pics and see whats going on. I have no idea what the springs and everything is suppose to look like though so ill post them here and see what you think. Now one post above me read some valves were not even in the head anymore? where'd they go? And should i look into buying a used head? or have mine rebuilt?

 

[silver bullit]

You dont even know if the whole motor is good, not to mention all that metal went into the turbo, valves went into head, intake mani, turbo, laying on top of piston, orin the oil pan thanks to the hole in piston, or you have a hole in the block.

Post some pics.

 

[toyotaturbo]

alright, well when i go home this weekend ill make a trip out there and take my valave cover off and take a couple pics and see whats going on. I have no idea what the springs and everything is suppose to look like though so ill post them here and see what you think. Now one post above me read some valves were not even in the head anymore? where'd they go? And should i look into buying a used head? or have mine rebuilt?

If you take the valve cover off and you see rockers anywhere but resting on the cam lobes, your valves are bent. The valves that I mentioned earlier were laying in the cylinder. That's why the engine was "locked". Because when we tried to hand crank the engine, it would lock at a certain point, indicating that there was something obstructing it (like the valves laying in the cylinder).

 

[preston145]

Well there isnt a hole in the block and there isn't a hole in the piston just a bunch of shavings from the spark plug.