What happens when the oil pick up tube cracks?
08-21-2008 | 04:05 AM
#3
Racer
Joined: Apr 2005
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From: Tallinn, Estonia
08-21-2008 | 11:50 AM
#4
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Joined: Aug 2002
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From: Phoenix, Az
I never noticed any problems till the bearing spun and 500 yards later the bottom of the #2 rod shot out the bottom of the engine.
Later on watchin in car video I notice something interesting.
The oil pressure gauge was in the picture and under hard braking at turn in the oil pressure would drop to zero. Then as soon as I turned and acclerated out it would come right back to normal pressure. I saw this happen for 3 miles or before it failed. However when driving I never saw any issues since I did not check oil pressure when braking at turn in. It was too busy to look at gauges there. When I check on the straight right after oil pressure was fine.
In fact my oil pressure was good even when the bottom end blew up. I suspect the tube was craked and flopping forward under braking enough to suck air, bit under accleration it would move back into place. The rod bearing could not stand this for long and spun. The rest of the motor was actually in great shape as the damage from no oil pressure was limited to the spun bearing and resuling damage when it siezed. I have been using the same head and cam from that motor for 5+ years since incident. Block was obviously trashed, but other 3 pistons and bores looked great.
08-21-2008 | 12:49 PM
#6
Thread Starter
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Joined: Jun 2002
Posts: 483
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From: Wisconsin
I had mine do that at the track.
I never noticed any problems till the bearing spun and 500 yards later the bottom of the #2 rod shot out the bottom of the engine.
Later on watchin in car video I notice something interesting.
The oil pressure gauge was in the picture and under hard braking at turn in the oil pressure would drop to zero. Then as soon as I turned and acclerated out it would come right back to normal pressure. I saw this happen for 3 miles or before it failed. However when driving I never saw any issues since I did not check oil pressure when braking at turn in. It was too busy to look at gauges there. When I check on the straight right after oil pressure was fine.
In fact my oil pressure was good even when the bottom end blew up. I suspect the tube was craked and flopping forward under braking enough to suck air, bit under accleration it would move back into place. The rod bearing could not stand this for long and spun. The rest of the motor was actually in great shape as the damage from no oil pressure was limited to the spun bearing and resuling damage when it siezed. I have been using the same head and cam from that motor for 5+ years since incident. Block was obviously trashed, but other 3 pistons and bores looked great.
I never noticed any problems till the bearing spun and 500 yards later the bottom of the #2 rod shot out the bottom of the engine.
Later on watchin in car video I notice something interesting.
The oil pressure gauge was in the picture and under hard braking at turn in the oil pressure would drop to zero. Then as soon as I turned and acclerated out it would come right back to normal pressure. I saw this happen for 3 miles or before it failed. However when driving I never saw any issues since I did not check oil pressure when braking at turn in. It was too busy to look at gauges there. When I check on the straight right after oil pressure was fine.
In fact my oil pressure was good even when the bottom end blew up. I suspect the tube was craked and flopping forward under braking enough to suck air, bit under accleration it would move back into place. The rod bearing could not stand this for long and spun. The rest of the motor was actually in great shape as the damage from no oil pressure was limited to the spun bearing and resuling damage when it siezed. I have been using the same head and cam from that motor for 5+ years since incident. Block was obviously trashed, but other 3 pistons and bores looked great.
Was driving and when I would come to a stop or turned at a street light the oil light would come on...
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08-22-2008 | 12:41 PM
#11
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From: Phoenix, Az
08-22-2008 | 02:26 PM
#12
Drifting
Joined: Oct 2007
Posts: 3,240
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From: Darien, IL
I had mine do that at the track.
I never noticed any problems till the bearing spun and 500 yards later the bottom of the #2 rod shot out the bottom of the engine.
Later on watchin in car video I notice something interesting.
The oil pressure gauge was in the picture and under hard braking at turn in the oil pressure would drop to zero. Then as soon as I turned and acclerated out it would come right back to normal pressure. I saw this happen for 3 miles or before it failed. However when driving I never saw any issues since I did not check oil pressure when braking at turn in. It was too busy to look at gauges there. When I check on the straight right after oil pressure was fine.
In fact my oil pressure was good even when the bottom end blew up. I suspect the tube was craked and flopping forward under braking enough to suck air, bit under accleration it would move back into place. The rod bearing could not stand this for long and spun. The rest of the motor was actually in great shape as the damage from no oil pressure was limited to the spun bearing and resuling damage when it siezed. I have been using the same head and cam from that motor for 5+ years since incident. Block was obviously trashed, but other 3 pistons and bores looked great.
I never noticed any problems till the bearing spun and 500 yards later the bottom of the #2 rod shot out the bottom of the engine.
Later on watchin in car video I notice something interesting.
The oil pressure gauge was in the picture and under hard braking at turn in the oil pressure would drop to zero. Then as soon as I turned and acclerated out it would come right back to normal pressure. I saw this happen for 3 miles or before it failed. However when driving I never saw any issues since I did not check oil pressure when braking at turn in. It was too busy to look at gauges there. When I check on the straight right after oil pressure was fine.
In fact my oil pressure was good even when the bottom end blew up. I suspect the tube was craked and flopping forward under braking enough to suck air, bit under accleration it would move back into place. The rod bearing could not stand this for long and spun. The rest of the motor was actually in great shape as the damage from no oil pressure was limited to the spun bearing and resuling damage when it siezed. I have been using the same head and cam from that motor for 5+ years since incident. Block was obviously trashed, but other 3 pistons and bores looked great.
i just moved so cleaning up garage and preping to drop engine and rebuild.
