4AGE Blacktop run berring damage (Pictured Autopsy)

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4AGE Blacktop run berring damage (Pictured Autopsy)

Postby Flannelman » Sat Sep 08, 2012 4:15 pm

So, a mate of mine desided to give his AE111 a hiding without checking the oil first. He came to me and said "would putting thicker oil in it fix it?" Politely I said no. A deal was made and I swaped his engine for a silvertop I had sitting around.

Took the engine apart this week and thought it would be fun to show what happens to engine parts when this type of failure happens.

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First thing is that the inside of the engine is coated with metal flakes. No, we are not panning for gold here as if I was, I'd be rich.

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Big end berrings.
Cylinder 1 to 3 is left to right. The damage gets worse the further from the oil pump the berrings sit. There was no sign of Cylinder 4 berrings left in the conrod. They are shiny as they had just been cleaned.

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Main caps, block side.
Again, furtherest from the pump sees the most damage. #3, #4 and #5 have chunks torn from there surface

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Main Caps, Cap Side

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Crank.
See the black staining on #1 big end. This shows alot of heat was generated. The oil that came in contact during this heating stage has burnt causing the dark apperance.

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#1 big end surface.
This will need regrinding. before it does, the crank will need checking for straightness and crack testing .A quick measurement came in at 41.8mmon the top and bottom sides instead of 42.

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#1 Conrod
Photobucket was being a bitch and couldn't upload the piston. It had impact marks from hitting the cylinder head. This, plus the clearance from no berring equals bent, burnt conrod

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#1 Conrod Berring Surface

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#1 Conrod Cap
Compare the colour

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#1 Conrod Cap Berring Surface

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Oil Filter
I cut this open to see whats inside.

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Side Of The Oil Filter

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Oil Pump Housing Plate

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Oil Pump Housing
I was expecting major damage here as its pumping oil that has only been through the mesh on the bottom of the pick up. Quite a suprise.

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Pump Gears.
Again, only light scratches.

Well, thats the tour.
I know I check my oil more often than what I use to after this happened!
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Postby evil_si » Sat Sep 08, 2012 6:42 pm

Looking at the heat generated on the crank webbing i wouldnt even bother with having the crank checked,
id personally be finding a good crank and scrapping that one.
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Postby DeeCee » Sat Sep 08, 2012 7:23 pm

great photo journey :) thank you
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Postby Dell'Orto » Sat Sep 08, 2012 9:10 pm

Dat conrod 8O
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Postby 1I1 » Sat Sep 08, 2012 11:43 pm

Probably not far off from adding an extra vent hole to the front of the block :lol:
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Postby dnalunchie » Sun Sep 09, 2012 1:36 am

1I1 wrote:Probably not far off from adding an extra vent hole to the front of the block :lol:


at first I scratched head but then I srs'd
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Postby rollaholic » Sun Sep 09, 2012 9:31 am

great photos!

i hope you've showed your mate :D
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