[oilcrankinject]

I am 99% sure I lost piston rings on cylinder 5.

29D1 - DME: Combustion misfires, cylinder 5.
2AAF - DME: Fuel pump, plausibility.
2D2E - DME: Throttle-valve angle - intake-manifold vacuum, correlation

I had to stop due an accident on an interstate. Speed limit: 75. I punched it, I did not over rev it but I pushed it to 6k rpms.

Misfire on cylinder 5
Tons of smoke, my car smokes like a smoke grenade.

Besides rings, what else could cause so much oil to burn in a combustion chamber?

800 miles on the rebuilt motor.

RPMs are also fluctuating. I saw this once before, problem corrected itself. I will check the vacuum line going to the intake.

ETA: Bore scope video shows con rod where piston should be. Major mechanical damage. Its a hard pill to swallow but I am done with this car.

[oilcrankinject]

https://youtu.be/gJLGu544iu4

Bore scope video





Spark plug from cylinder 5. Now it looks like I lost a valve or two. Timing is correct though. I am confused.

[relative4]

Somebody done throwed a rod.

[oilcrankinject]

That is what I think as well.

:/

[Emilime75]

WTF...in the video it looks like you're missing a piston. As you pull the camera up you can see the top of the rod where the wrist pin is supposed to be connecting the piston to the rod.

It actually looks like you blew a giant hole in the piston and, what little remains of it, is down at the bottom of the cylinder bore. That engine is done for.

[IllSic_Design]

yeah WTF, looks like that piston is gone??? That looks to be the end of the rod where the wrist pin goes.

Who rebuilt your motor?

[_N54]

Jesus....

[_N54]

Where's the piston and the wrist pin...

[BSM n54iS]

Ya but how did your vacuum line look??

[Saif2018]

Originally Posted by oilcrankinject

I am 99% sure I lost piston rings on cylinder 5.

29D1 - DME: Combustion misfires, cylinder 5.
2AAF - DME: Fuel pump, plausibility.
2D2E - DME: Throttle-valve angle - intake-manifold vacuum, correlation

I had to stop due an accident on an interstate. Speed limit: 75. I punched it, I did not over rev it but I pushed it to 6k rpms.

Misfire on cylinder 5
Tons of smoke, my car smokes like a smoke grenade.

Besides rings, what else could cause so much oil to burn in a combustion chamber?

800 miles on the rebuilt motor.

RPMs are also fluctuating. I saw this once before, problem corrected itself. I will check the vacuum line going to the intake.

ETA: I pulled the spark plug from cylinder 5, there is no head on the spark plug. The bore scope video it at the top of the 2nd post.

A recently rebuilt motor grenaded?

It looks like serious internal damage to the engine, exactly what stage tune/psi
Were you running at just before this happened?

[oilcrankinject]

I rebuilt it using the now the defunct newtis. I bought all of the special tools required...

Stock everything. Hell my turbos had shaft play but they still worked. I think I am done with my car.

[Wolf 335]

This looks really bad.

Sorry for your loss.

[oilcrankinject]

Originally Posted by Wolf 335

This looks really bad.

Sorry for your loss.

Thanks Wolf. Its very hard pill to swallow but I need a car to get to work. I put a ton of time and money in this car, it was my car, but think it time to cut my losses.

[Wolf 335]

Originally Posted by oilcrankinject

Thanks Wolf. Its very hard pill to swallow but I need a car to get to work. I put a ton of time and money in this car, it was my car, but think it time to cut my losses.

How much did you spend on this used engine?

[oilcrankinject]

Originally Posted by Wolf 335

How much did you spend on this used engine?

I have not computed the total cost but at least a couple Gs.

[BSM n54iS]

Sorry op. What actually went wrong from your rebuild though?

[oilcrankinject]

Originally Posted by BdSM n54iS

Sorry op. What actually went wrong from your rebuild though?

I have no idea. I would have to pull the engine to pull the head. Right now I am looking for a cheap car since I need a car to get to work.