found metal in the intake (pic)
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On The Tree
Joined: Jun 2010
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found metal in the intake (pic) My friend found metal in his intake manifold . We have no idea where it came from . maybe piston ring ?
The symptom was knocking sound from the intake.
The car is C5 Ls1 H/C.
The symptom was knocking sound from the intake.
The car is C5 Ls1 H/C.
I don't see how it could be anything from the valve train, I don't see any way possible for something under the valve cover to make it into the intake tract. If someone can tell me how that could be possible I'd like to know?
As far as it being anything related to the pistons, I've only ever saw that in major blow ups when valves contact pistons and starts eating itself.
I would look at everything leading into the intake itself.
How was the car running other than the sound coming from the intake?
As far as it being anything related to the pistons, I've only ever saw that in major blow ups when valves contact pistons and starts eating itself.
I would look at everything leading into the intake itself.
How was the car running other than the sound coming from the intake?
Piston came apart. That ring's an piston material.
It was probably flat and got curled up. Pull the heads and you see the damage in the combustion chamber.
BTW don't reuse that intake on the next engine. There are probably more smaller pieces that have not come out.
It was probably flat and got curled up. Pull the heads and you see the damage in the combustion chamber.
BTW don't reuse that intake on the next engine. There are probably more smaller pieces that have not come out.
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Joined: Sep 2005
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From: NYC
Go to Autozone and borrow an inspection camera to inspect inside the spark plug holes; less labor.
Or buy one: http://www.harborfreight.com/High-Re...der-60695.html
Or buy one: http://www.harborfreight.com/High-Re...der-60695.html
That's what it looks like to me too. Probably lifted a ring land.
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Very common, did you have a "tune" in it? I'm assuming you did because it is a H/C car. Next time you have it tuned don't go for MAX hp. Go for KEEP NUMBER 7 alive. The factory stays way rich to be sure it lives a long life. The only LS1 car I had tuned lost number 7 piston after hard driving........no more for me.
Number 7 runs lean and hot.
Number 7 runs lean and hot.
we see it all the time....
find pieces in the other side of the engine from where the broken piston is
anytime something comes loose inside a cylinder, it can come up and bounce around the intake...
air doesnt just go in the intake and out the exhaust....
it mostly does, but it breathes both ways at the cam overlap.
piston parts often end up in the intake and then crossing to somewhere else causing more damage
hell... I've even seen half a valve end up in another cylinder....
Very common, did you have a "tune" in it? I'm assuming you did because it is a H/C car. Next time you have it tuned don't go for MAX hp. Go for KEEP NUMBER 7 alive. The factory stays way rich to be sure it lives a long life. The only LS1 car I had tuned lost number 7 piston after hard driving........no more for me.
Number 7 runs lean and hot.
Number 7 runs lean and hot.
its been proven repeatedly that it helps with the back cylinder heat
and it allows air and steam to escape that gets trapped back there.
theres a reason they keep that rear vent on the nascar LS engines
and I can tell you as an engine builder, I see less problems with #7 and #8 on the engines that have the rear vent/crossover setup
and it allows air and steam to escape that gets trapped back there.
theres a reason they keep that rear vent on the nascar LS engines
and I can tell you as an engine builder, I see less problems with #7 and #8 on the engines that have the rear vent/crossover setup