Pontiac Street Performance
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password

 All Forums
 Pontiac Performance
 Blocks / Cranks/ Rods and Pistons
 Terrible balancing job
 New Topic  Reply to Topic
 Printer Friendly
Author  Topic Next Topic  

Corncob2061
Crazy Horse

USA
516 Posts

Posted - 01 Aug 2019 :  10:40:34 PM  Show Profile  Reply with Quote
Not sure who balanced this engine. It is the original 455 in a 70 GTO. It is actually the same car I mentioned in the car buying stories thread. Thought I would post some pictures of this crappy balancing job.

A little history. There were several of us driving up to a street race at a track and on the way up this engine all of a sudden lost oil pressure. I always figured it was a relief valve problem when he had it happen. My friend pulled the engine and had someone he thought would do ok rebuild it. So they rebuilt it but found nothing wrong. Sent the engine out with the same problem. It started knocking, I went to listen to it and could tell it was a rod knock. Plus the engine was hardly able to pump any oil to the rocker arms. So he pulled it and my brother and I went over to see what he had. Turns out someone improperly drilled a hole balancing it and hit an oil galley hole on the first throw of the crank. It made it about 800 miles on the last rebuild, now it is all apart again .....Jay

[URL=https://imageshack.com/i/pldx77Xdj][/URL]

Edited by - Corncob2061 on 01 Aug 2019 11:00:49 PM

Corncob2061
Crazy Horse

USA
516 Posts

Posted - 01 Aug 2019 :  10:47:47 PM  Show Profile  Reply with Quote
Look where they drilled. Right next to the front main through the throw. It would surely brake if it was a race engine.

If that was not enough. This topped it off..

[URL=https://imageshack.com/i/pmA1mlzUj][/URL]

And

https://imagizer.imageshack.com/img921/7099/dx77Xd.jpg



FOR A CLOSER LOOK
https://imagizer.imageshack.com/img922/7687/A1mlzU.jpg

Edited by - Corncob2061 on 01 Aug 2019 11:57:14 PM
Go to Top of Page

Merrik66
Cochise

USA
398 Posts

Posted - 02 Aug 2019 :  03:12:53 AM  Show Profile  Reply with Quote
Holy sh!$. I suppose a greeny might miss checking that but even still what a huge mistake. Mistakes happen and I get that. I?m curios if the old builder will be contacted and move forward with some type of complaint?
Go to Top of Page

Corncob2061
Crazy Horse

USA
516 Posts

Posted - 02 Aug 2019 :  2:06:53 PM  Show Profile  Reply with Quote
The car spent many years at a body shop getting restored after the engine was built. Not much he can do. You see that sometimes on major restorations. If the engine is done early on by the time the car is finished the rebuild is several years old with no or few miles. Sometimes our zeal for getting the power plant built gets the cart ahead of horse. Jay

Edited by - Corncob2061 on 02 Aug 2019 2:15:23 PM
Go to Top of Page
   Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Pontiac Street Performance © 2006-2017 Go To Top Of Page
This page was generated in 0.05 seconds. This Site Sponsored By:
Powered By: Snitz Forums 2000 Version 3.4.05