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Metal sludge after rebuild

Old 17-04-2019, 08:21 AM
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Default Metal sludge after rebuild

Metal sludge in sump after rebuild

Hey i am busy with an xr4i to pit on a aftermarket ecu.

To cut things short: i dropped a stainless ring in my engine. And luckily it went in my sump. So i dropped the sump of my car.

To find some metal sludge in my sump. 3 mm of oil that woud not mix with the rest of the oil.

The engine is rebuild some years ago. About 3/4 years. 2 years ago i pilled it apart again for diffrent alu camshaft gears and head gasket. No metal found!!! i did break the engine in with normal

Oil. No disturbing things found.

Dont know if i replaced the oil back then.

After the 2nd tear down i used the car mainly for short distance. Had some long high speed runs on the autobahn some small burnouts. Nothimg really crazy

Light to mild abuse engine always warm.

1st teardown:

New arp conrod bolts


Crank bearings

Conrod bearings

Piston rings + hone

High flow oil pump

New used crank

2nd tear down

New new camshaft no bearings

New timing gear


As i am busy with the aftermarket ecu. I have let the car sit for about 3/4 months. Last month i cranked the engine with no plugs to see if there was a crank signal. I cranked the car for maybe 5 whole minutesfrom last month to noe (in maybe 50 key turns.

And last i saw there was no oil pressure while cranking.

So i primed the engine and got 4 bar of oil pressure with a electric drill.

Oil pressure on cranking is 3.4 bar somewhere around that.

Is it normal to find metal particels in the oil at this stage? I ve driven it for around 2to 3000 miles since the first teardown.
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Old 17-04-2019, 08:55 AM
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5 minutes of cranking, no oil pressure throughout - doesnt bode well.

Regardless, although on a fresh build you'd expect to see a little material floating in the oil (and i do mean little), under no normal circumstance would i expect to see a "sludge". Something is fooked!
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Old 17-04-2019, 10:54 AM
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This is what i found.
no idea how it can possibly be that there is no oil pressure. Because i had pressure when i put it away.
and i did nothing to the engine meanwhile it sat.

the sparkplugs were out. And no real firing happend only cranking.

but i gues this metal sludge can not be like this just by cranking. From a month??

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