what happened to my motor?
#1
10 Second Club
Thread Starter
iTrader: (2)
Join Date: Feb 2004
Location: Donna, Texas
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
just got a fully assembled 427 shortblock from a popular ls1 company. my mechanic installed it and it worked great. after about 300 miles of driving the oil that had been at about 20-30psi at idle dropped to nothing and i turned the car off right away. when we opened up the car the crank had some pretty good scarring and the rods and pistons were shot along with the main barrings. the oil pump was fine with No signs of shiny blue surfaces caused by heat. the o-ring on the oil pump was fine too. the cam had no scarring or any signs of damage. the cylinder walls will be fixed with some minor honing (spelling?). the odd thing to me is that the front six rods bearings and channels on the crank are where the damage is. the back 2 seem unharmed. what do you guys thinnk happened?
#2
12 Second Club
iTrader: (7)
Join Date: Nov 2004
Location: Nashville, TN
Posts: 271
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Ewww, sorry to hear about your situation there. Nothing really concrete comes to mind, only the typical things such as some metal shavings left in the motor and getting in the crank oil holes (or any oil port I guess) since it seems to be bottom end damage. Best of luck and keep us posted.
#6
10 Second Club
Thread Starter
iTrader: (2)
Join Date: Feb 2004
Location: Donna, Texas
Posts: 122
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
well the guys i bought my engine from just say starvasion of oil and are talking no responsibilities what soever. i'm going to have to buy a new rotating assembly. the plugs were fine too so i have no idea what could have happened other than setting the clearances wrong.
Trending Topics
#8
TECH Senior Member
iTrader: (21)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by Phoenix H.O.
well the guys i bought my engine from just say starvasion of oil and are talking no responsibilities what soever. i'm going to have to buy a new rotating assembly. the plugs were fine too so i have no idea what could have happened other than setting the clearances wrong.
#10
TECH Fanatic
iTrader: (1)
Join Date: Nov 2002
Location: Venice, Ca
Posts: 1,829
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Damn that sucks. How come you don't just get the crank turned down and use oversized bearings on the mains. You can use a rod with a 2.00" journal on the crank. I am using an offset 2.00" journal on my lunati crank. It sounds to me like incorrect bearing clearances caused the problems. Good luck getting things resolved.
#11
TECH Senior Member
iTrader: (1)
Join Date: Nov 2001
Location: Waco, TX
Posts: 6,449
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Did you get a build sheet with the motor, with bearing clearances listed? I'd be curious to know what rod & main clearances they used. If you don't have one, it's probably too late to call and ask, as they'd probably just "make one up".
#12
TECH Enthusiast
iTrader: (23)
Join Date: Mar 2004
Location: North Olmsted, OH
Posts: 673
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Sorry to hear about your motor. Hope you get it worked out. BTW I found it pretty humorous that you took care to avoid mentioning the company.
Then I look just a bit below in your signature to see it spelled out in there. ![The Jester](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_jest.gif)
Anyway good luck!
just got a fully assembled 427 shortblock from a popular ls1 company.
![The Jester](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_jest.gif)
Anyway good luck!
#13
6 Second Club Moderator
iTrader: (7)
Join Date: Sep 2002
Location: Lombard .IL
Posts: 3,682
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Check the inside of your oil pump. Someone installed mine wrong where it was hitting the crankshaft! Shavings were EVERYWHERE!!!!! Ruined the bearings, but the crank is ok.