1999 GMC Yukon Engine broke to piece? Broke Oil Pan with 3

LEE2305

MEMBER
1999 GMC YUKON
V8
4WD
AUTOMATIC
70,000 MILES

I have 1999 GMC Suburban, Service Engine Soon light has been off and on, went to garage twice, the last time they replaced intake gasket. First time drive on highway after that, Service Engine Soon light went on again, 15 minutes later the car started shaken, liquid stated to leak with smoke. Pulled the car to the shoulder, noticed there are 3 big holes on oil pan, and oil leaked all over. Car can no longer be started. I could not find any broken piece on the ground though. See picture attached, each hole in the size of a quarter. Looking at the picture again now, it seems the oil pan is broken in the corner too besides the 3 holes. I'd like to know what the root cause is, and if this has anything with the service done by garage.

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

The last time they replaced intake gasket. Its got nothing to do with this-lack of lubrication/dirt will cause the bearing to run dry and weld on the journal and then it will snapped open

The only way to tell is to open it up-could be a loose rod cap to begin with then finally came off and connecting rod end up puncturing the oil pan-Hard to say what happened here-it needs to be open up and proper inspection done to determine the caused

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Thursday, October 16th, 2008 AT 10:48 PM

LEE2305

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2 POSTS

I'm not quite sure I understand your answer. It is hard to tell from the picture, if you actually look at the oil pan, the 3 holes look like was shot by bullet from inside since the edge of the hole was like a flower pedals sticking out. From your answer, it seems to me you are suggesting the rod was punching the oil pan from outside, and that is not the case, it was definitely something shooting from inside to outside, and even the garage owner said it was an explosion inside the engine caused the holes on the oil pan. I have checked with other technician, and was told if there is explosion inside the engine, it means that the engine is lack of oil. Does it make sense?

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Thursday, October 16th, 2008 AT 11:16 PM

RASMATAZ

MECHANIC
75,992 POSTS

From your answer, it seems to me you are suggesting the rod was punching the oil pan from outside,

Sir-the connecting rods are attached to the crankshaft above the oil pan-when they go they do all kind of damages-go thru the cylinder wall/snap of a wrist pin If the oil is saturated with fuel and ignition goes thru the cylinders it will cause an explosion.

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Thursday, October 16th, 2008 AT 11:38 PM