Metal in oil, slight knock, and vibration - engine is toast, but what happened?
Thread Starter
Joined: Oct 2005
Posts: 520
Likes: 1
From: Fallston, Maryland
Car: 1989 Trans Am GTA
Engine: 350
Transmission: T56
Axle/Gears: 9 Bolt 3.70
Metal in oil, slight knock, and vibration - engine is toast, but what happened?
Here's what's going on:
-There's a lot of metal in the oil.
-There's a slight knock
-I can feel a vibration through the shifter
I just put a T56 in it maybe 700 miles ago. Not sure if that's related or not. LT1's and L98's are both internally balanced, so using an LT1 flywheel shouldn't have thrown the engine balance off. It's also leaking at the rear main seal. It's been a bit damp back there for a year or two, but never bad enough to drip on the ground. Now it is. I don't know if this is a coincidence or not. The engine also has 104k on it. Any ideas what caused this?
Here's some pics of the oil I just drained out:
-There's a lot of metal in the oil.
-There's a slight knock
-I can feel a vibration through the shifter
I just put a T56 in it maybe 700 miles ago. Not sure if that's related or not. LT1's and L98's are both internally balanced, so using an LT1 flywheel shouldn't have thrown the engine balance off. It's also leaking at the rear main seal. It's been a bit damp back there for a year or two, but never bad enough to drip on the ground. Now it is. I don't know if this is a coincidence or not. The engine also has 104k on it. Any ideas what caused this?
Here's some pics of the oil I just drained out:
Supreme Member
Joined: Jul 2009
Posts: 2,328
Likes: 9
From: Kitchener, ON
Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: Metal in oil, slight knock, and vibration - engine is toast, but what happened?
Wooooo. Bearing material swirls in the oil is really bad news.
Supreme Member
Joined: Jan 2009
Posts: 2,313
Likes: 115
From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: Metal in oil, slight knock, and vibration - engine is toast, but what happened?
time to pull it out for a rebuild..tough to say what the
cause was:water in the oil,high revs with cold oil,
grooved journals,are just a few possible causes...
just have to fix it up better than it was before
cause was:water in the oil,high revs with cold oil,
grooved journals,are just a few possible causes...
just have to fix it up better than it was before
Thread Starter
Joined: Oct 2005
Posts: 520
Likes: 1
From: Fallston, Maryland
Car: 1989 Trans Am GTA
Engine: 350
Transmission: T56
Axle/Gears: 9 Bolt 3.70
Re: Metal in oil, slight knock, and vibration - engine is toast, but what happened?
I think I figured out what happened. I took a peek in the radiator last night and the coolant was clean, but the level itself was pretty low. Coolant got into the oil and this is the result.
Member
Joined: Feb 2008
Posts: 219
Likes: 0
From: Antelope Valley, Ca...So.Cal.
Car: was 85 TA, 91 TA both sold
Engine: was 406, now 305 tpi
Transmission: 85 had700r4,350..91 had t5
Axle/Gears: 323,373,342
Re: Metal in oil, slight knock, and vibration - engine is toast, but what happened?
looks like you caught it early, looks more like a milk shake and more brownish in color when it's really bad.
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