is this safe to run?

[norbs]

Due to a faulty injector , the spark plug insulator broke and fell into the piston and destroyed the valve. The question is can i put this back together after fixing the valve?

 

[deadhorse66]

I have seen people run worse looking pistons than that, but the problem with that is that you can't see what the rest of the piston looks like. Are the ring lands damaged? Is the piston possibly cracked? You won't ever know without taking it out. I would at least do that if not replace it. Were it mine, I would definately replace it. Just my $.02...

 

[bruce]

Due to a faulty injector , the spark plug insulator broke and fell into the piston and destroyed the valve. The question is can i put this back together after fixing the valve?

You gotta look at the piston, and see if the upper ring land is fubar'd, and to smooth out the edges, so that there aren't any *hot spots*.

What size injectors were those?.

 

[norbs]

83's Im on the 3rd one that has failed so far. I just don't know whats happening to them.

 

[Quick6'n'-K.C.]

How are they failing?
Just wondering for future reference.

thanks
BW

 

[norbs]

The last one collapsed inside and had zero fuel flow, caused the exh valve to stretch from overheating and had zero compression,

 

[bruce]

83's Im on the 3rd one that has failed so far. I just don't know whats happening to them.

Can I get you to send me one of the failed ones?.
Were they all on the same cylinder, ie injector driver?.

 

[Otto J]

Drop the pan and pull the one piston and take a good look at it,Not that much more work,youll kick your self in the ass if you put it back together and find it has no compression

 

[norbs]

heres a look at the turbo, is this safe to run again? The injectors were on different cyls, i am having it flowed soon will update you

 

[Otto J]

Exhaust wheel, It may be a bit out of balance,but it will still spin,chances are the out of balance will were the bearings out mighty quick and make an even bigger mess on the compressor side

 

[norbs]

Thats not a good thing.

 

[jjvites]

With the hit that the end of the piston took where the ring sits, it's a good chance that this ring might be seized. If the ring can't rotate on the piston you will have problems very shortly. You got the head of, now pull the pan and save yourself a lot of time and grief.

 

[norbs]

I think i am gonna pull the motor out, the girdle is leaking like a valdez tanker anyway. Maybe i should take up a new hobby like photography.

 

[Hacksaw]

My $.02:

That exhaust wheel on the Turbo probably got chewed up by the $#@^ from the broken parts.

I don't think that turbo is going to have much of a life span now, they spin sooo fast under boost. Time for a rebuild or new one.

That piston *might* be ok now, but those dings may cause: Hot spots (read detonation danger), OR stress points that cause the piston to fail. If the piston fails the exhaust valve & turbo are screwed royal (more foreign objects ), & the block probably is, too! And without pulling the piston you won't find something like the mentioned seized ring for a few miles.

And have you looked at the that cylinder's walls yet? The picture was just TDC, so no telling what kind of scoring was done. I can in the picture some kind of metal on the side of the piston around 7 o'clock.

Too bad the girdle is leaking, otherwise I would do like said, & just pull the pan & replace the piston & rings, IF the cylinder walls are ok.

Are you adding any kind of octane booster or gas additive? And what kind of gas are you using? And how often do your change the fuel filter?

 

[John Wilde]

sorry norbs!

 

[norbs]

Don't be sorry John, contribute to the"norbie" fund via norbz@sympatico.ca. I will glad accept donatations to get me back up and running. The car was raced with razors alky kit and 94 octane fuel the fuel filter is 6 months old and the gas tank strainer was replaced last year. There was 0 knock on the run and the a/f ratio was 11.4~ There is one deep scratch in the cyl wall i can feel with my fingernail.

 

[norbs]

Here is the pic of the spark plug, if someone can help me come to a conclusion what went wrong, injector will be flowed hopefully this w/e.

 

[Otto J]

Are you still using a factory injector harness norbs? If so i have seen alot pf lean problems from bad-old wiring,I have been installing those hot wire injector harnesses with great results,Each time ive had to lower the VE number quite a bit and the DUty cycle dropps 12-15%

 

[norbs]

I do have the racetronix injector hot wire kit, my injector duty cycle is less than 50% with alky to maintain an a/f of 11.3-4 ish. There was no knock on the pass timing was at 23 , but on the way to the track the car was acting funny. I would just be cruising and i would get 2 degrees knock every 15 minutes at steady rpm. I readjusted timing and still came back, i have a feeling bits of ceramin were falling off the plug as i was driving?

 

[salvageV6]

What plugs are those?

I think that went first.

No loud pops or booms?