| The oilpan was removed at 107k miles, several oil changes and two more
engine flushes after oil deposits were found under the valve cover.
Engine history before dropping the oilpan:
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Valve cover removed at 100K miles to repair valve cover leaks
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UOA (Used Oil Analysis) by Blackstone Labs
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Amsoil engine flush was used with one oil change
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Oil pressure and compression tests
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Auto-Rx engine flush before oilpan removal and oil pickup
screen cleaning
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Timing chain tensioner removed, measured, and found extended to limit
Click any picture below for a larger view. |
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Oilpan
Interior with oil screen removed and tilted up to see area clogged
with oil deposits. Bottom of oil pan is covered with a tar-like layer of
oil deposits. |
 |
Oil Screen
The screen was about 80% plugged. Probably just enough free area
left to maintain minimal oil pressure. |
 |
Metal in Oilpan
Close-up. Small flakes of metal were found embedded in the layer
of oil deposits in the bottom, between 1 and 2 mm in size (some spots are
reflections). No metal was found in drained oil earlier, and almost
nothing was found on the magnetic oil drain plug. |
 |
Bearing Damage
One main bearing and one rod bearing were removed for inspection.
The rod bearing showed heavy wear. Using the Haynes manual as a reference,
it resembled example F in diagram 15.2, chapter 2B, "craters or pockets". |
 |
Cracked Rod Bearing
When both main and rod bearings were later replaced, one of the rod
bearings came out with layers of metal stripped away, and one of the half-shells
in pieces. The picture shows the reason for the amount of metal found
in the oil pan. |
Links
Blackstone Laboratories
Amsoil Engine Flush
Auto-Rx
|
References
Haynes 2B-15, Main and big-end bearing inspection
Saab EPC 2-0600, Oil Sump, Oil Filter |
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