My daughter had a problem at one point after an oil change by a large oil company that shall remain unnamed but the first part of the name starts with “fire” and the last part rhymes with “bone”.
She calls me, I head over and found the oil plug was missing. That can’t be a coincidence so I called the stoners.
They said that 99 percent of the time, the plug is just fine and there aren’t any problems at all.
In other words “it is very unlikely it was anything they did…”.
“I don’t know what’s more scary: that you kept track of a statistic like this or the fact that you think that this statistic is a good record because a ninety nine percent success rate means that one in one hundred cars you change the oil in will have that plug fall out…”.
Well, after a bit of back and forth, they agreed to change the engine with a low mile one. They weren’t happy but they wanted to keep her as a customer - yeah, like that will happen. They acted like they did us all this huge favor.
After we got it back and she had been driving for a week or two, she calls me again. “It is making a weird clanging noise…”. No lights were on and it accelerated normally. She was only two miles away so I told her to get it to my driveway. First thought was that the replacement engine was junk.
After she shut it off, it would not restart again.
Looking at it, all the driveplate bolts had walked out. It had physically torn the driveplate to pieces and bits were flopping round. The last bolt and part of the driveplate were holding on for dear life and she must have just made it to my driveway when the bolt finally snapped off.
I decided to just yank the engine and redo it myself. Morons that think a 99 percent ‘bolts tightened properly’ record is perfectly good can’t be trusted with cars. The driveplate being held in with four bolts, two studs, two nuts and various other fasteners to mount an engine, you’re playing with fire thinking that stuff is snugged up tightly. That’s just statistically less probable at a place like that.
The torque converter was jacked up but after some retapping of holes, it all went together fine.
Long story short: do not have them replace your engine!