New member!! With a blown up Fiesta from MI

[Chris B]

Hello my name is Chris I think it's time I join the forum! I am in the process of installing new Pistons in my fi at 9885 miles! So I am hoping to show the process and let everyone see what it's like to tear this thing apart!

 

[Flaco]

Welcome, and what happened ?

 

[Sourskittle]

The warranty would not cover anything? Please, show all the pictures you can. If you don't want to post them all, Email them directly to me !! I'm very interested

 

[D1JL]

Sorry for your misfortune.
However Welcome Aboard.




Dave

 

[FocusMike]

Welcome. Can you share some more background on your car?

 

[Chris B]

Well I bought my fiesta with 2500 miles on it. It's been an amazing car. One day on my way home from work I pulled up to a stop sign and noticed my tach was bouncing a little at idle and it was missing. It felt just like a misfire caused from a coil pack. It was raining pretty hard and when I got home I thought maybe a coil got wet. It sounded like a Subaru with a cam! Then as I glanced up from looking under the hood I noticed smoke from the exhaust so I shut her down and decided to pull the plugs. They were all good except #2 fouled full of oil. Then I did a compression test all had 185-190 except #2 it had 65lbs. So I added a ounce of oil to the cyl and my compression jumped to 190! So knew I must have cracked a ring. So I just pulled it all apart and somehow the bottom o the piston broke apart and I cracked all the rings on number 2. But I couldn't tell you what caused it. All the other pistons are fine. The only conclusion I have is it must have been a bad cast or just a faulty piston. It's broke in an area that j have never really seen before. I was wondering if there are any other cases of this.

 

[Sourskittle]

I think is this def the first time we've heard of something like this. Its fairly common of Focus ST's. But the fiesta's have a really low rate of random engine parts breaking.

 

[Chris B]

I need to figure out how to post pics so you guys can take a look and let me know you think.

 

[TheGreenOne]

I need to figure out how to post pics so you guys can take a look and let me know you think.

Upload them to www.imgur.com and then link them here using the BBcode.

 

[rexdriver85]

Welcome. Sorry for the misfortune. Interested to see some pictures.

 

[me32]

I think is this def the first time we've heard of something like this. Its fairly common of Focus ST's. But the fiesta's have a really low rate of random engine parts breaking.

What causes them on the focus st

 

[airjor13]

What causes them on the focus st

Milion dollar questions

 

[rodmoe]

Welcome and sorry for your pain ..

 

[BoostBumps]

Welcome.....sorry to hear and good luck...

 

[Sourskittle]

What causes them on the focus st

Not sure anyone knows, but its almost always on the same cylnder

 

[Chris B]

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[Chris B]

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[dyn085]

What causes them on the focus st

The majority of failures are on cylinder 4, which is the hottest due to being the furthest from the water pump. There's also a pretty poor timing transition that is noticed in low-moderate load transition that typically occurs in high gear when on cruise (like going over an overpass on the interstate). Finally, it's believed that the ring-gap is too tight from the factory.

Basically, many failures add up to LSPI. There are plenty of instances of abuse and a few from reaching stock component limits as well. When time-equalized, the FiST is showing significantly fewer failures as I've only seen a handful of them so far.

 

[Chris B]

My car is all original except k&n intake and exhaust. I definitely don't baby the car but I don't abuse it. I'm just hoping when I put it all back together it doesn't happen again

 

[dyn085]

It's entirely possible to just have had a bad part. Why didn't you try and get it fixed under warranty?