Help with EGT probe metal filings

[Traveler]

I just drilled and taped the 1/4" hole for the EGT probe. I was going to disconnect the exhaust manifold from the turbo but that looked like quite a chore. I drilled the hole on the rear vertical down section of the exhaust manifold. I used lots of grease and had a shop vac rigged up with a hose right at the hole. I still got some metal filings down in the inside. I spent about 30 minutes fishing around with a magnet. The last 10 minutes came up with nothing. The problem is that I don't know how far filings will go since the hole is in a vertical section that goes right to the turbo and you are bending the magnet at 90 degrees?

I have a air compresser, would it do any good to poke a nozzle in the 1/4" and try to blow anything that might be left through the turbo? Problem is some of the valves are open so I would be blowing air back through some cylinders. I also wonder about taping the exhaust pipe shut and starting the engine? I don't think a 1/4" hole is big enough for exhaust gases to go through? Is there something else I could remove to get a look at the turbo? Like the exhaust elbow or would that also be a chore? Whats a new turbo cost?



Any ideas?

 

[RustyJC]

When you fire the engine, any remaining chips will be blown through the turbo. The turbine wheel is cold and will barely be rotating when the chips pass through - they normally won't hurt a thing. It sounds like you've already taken care of any big chunks.



Now, if you want to talk about turbocharger damage, break a piston ring in a 2-cycle engine and throw a large chunk of it into an axial turbine on a turbocharger!



Rusty

 

[Parks]

RustyJC said it all. Fire that puppy up!

 

[nickleinonen]

Now, if you want to talk about turbocharger damage, break a piston ring in a 2-cycle engine and throw a large chunk of it into an axial turbine on a turbocharger!

:-laf:-laf:-laf



sounds like the problems i have at work. . more so a problem on the ge 4 cycle engines [the emd 2 cycles have a screen before the turbocharger preventing large debris from hitting the turbine wheel]

 

[testraub]

This is why I put my probe POST Turbo

 

[metal tech]

I'll second RustyJC. I did the same thing (15 months ago), just fire it up and what chips remain are blown out the exhaust.

 

[nickleinonen]

This is why I put my probe POST Turbo

turbocharger replacment is less than engine internal repairs from excessive heat... and probes fail rarely... [similar construction to glow plugs used in other diesel engines... and the factory sticks them inside the combustion chamber or precup]

 

[Nate]

Could just pull the turbo off as well. I started to take mine off this afternoon, but I had to go to work. Doesn't seem like it will be too hard.

 

[WCounts]

I would take the intake off and turn the compressor wheel by hand to make sure its free. Be carefull the blades are sharp. I would then start the engine and let it idle for a few mins. If nothing happens you should be ok. The turbine is small on a third gen. but the shavings should pass through ok.

 

[Traveler]

Well, I did what Rusty said. I "fired that puppy up" I just let it idle for awhile and everything "seems" to be ok? Will give it more of a test when I get the gauges installed and wired up. Will know the poop scoop tomorrow.





Ron

 

[Huff N Puff]

There is fine debris constantly being expelled on a diesel engine,combustion process is forming carbon,that builds up and breaks of regularly. The turbocharger is constantly being pounded by this stuff,so let it rip.