What makes a car sling a rod?

I dont think it slung a rod. More likely a rod bearing. They do wear out. But more often then not lack of oil or a clog is the culperate. I really hope it isnt a slung rod, as that will cost a whole lot more then the bearing as it will do damage to the block. This is generally a point where you have to decide to rebuild the engine and keep the car or sell it as a parts car. Your friend is looking at about a $2k repair bill to do it right.

I have a question for the mechanics out there. I have a 99 tahoe that has a new water pump, new fuel sending unit, new fuel pump, new altenator, new transmission, and just had new heads put on by a mechanic. It had an oil change and full tune up during the head changing. I got it back from the mechanic and it seemed to run great, no grinding, humming, or knocking noises. I drove it for a week then went to my mom's house for the day. Got in it at the end of the day to go home, started it up, it ran great no bad sounds or anything unusual. Drove about 7 miles and was not pushing her at all, still slowly gaining speed to the speed limit. Suddenly, with no warning, there was a loud bang like a tire blew, I pulled over and notice she was making a horrible noise so I instantly shut her down. My husband crawled under her and noticed that there were two holes in the oil pan at the top-one on each side. She was still full of oil. I got a ride home and went back the next day to get her, she was still full of oil. Put her on a trailer and took her back to town. A month later she is still full of oil. There was not low oil pressure light on our anything, everything was great before the bang. Could the mechanic that changed the heads maybe have done something to cause it to sling a rod? She still starts up but I will not do it because I do not want to cause more damage. I had a mechanic who was suppose to look at it and tell me if it was mechanic error but come to find out, he is friends with the mechanic that replaced the heads and he will not look at it, he just keeps telling me that it is not a mechanics error when he never checked it out to see. What could cause a rod to suddenly sling without any warning at all?

The mechanic is exaggerating but there is bearing damage possiblyand that allows the connecting rod to wander on the crankshaft and knock. If you have the bottom end fixed your car may have a bit more life. There are other problems in your car related to high mileage.

Ive seen engines that are very worn and I've seen wear pracicaly ar by arrested by Slick50 treatment which is done when the engine is faily newly broken in. If you choose to have the main and connecting rod bearings replaced and the crankshaft refinished, you might go that route. But, the valvetrain and pistons are worn at this stage.

Slinging, or throwing a rod is the destructive condition where a connecting rod bearing freezes and the piston's force on the power stroke forces that rod out of the crackcase- through the pan or side of the block.

Often, lack of lubrication is the cause of throwing a rod. It can be from sludge closing off oil flow, worn out bearing letting oil pressure fall too low, failed oil pump or any combination of those events.

its a HE and was soo embarrassed u thought it was a she,,,just blowed up sir,,,,

1 ever overheat? that's sure death on small aluminum head engines

2 ever run out of oil? 3 wrong oil,,10 w 30 or the like?

3 just a bad crank bearing,,,shlt happens,,sorry 4 ur loss

tou say u did all maintance,,,how did battery get so bad and no one noticed

u sure it didnt overheat,,,,