hi there i have a 73 olds 350 that siezed on me while driving, i am running it in a stock car and i had just finished my qualifing laps, they are short 1/3 mile each and I ran two. anyway I was leaving the track and my 350 just quit when it got down to near an idle,i did not here any noise ar any thing out of the ordinary. i cant budge the crank with a breaker bar. any ideas would be helpful before tear it out it was a good strong motor and i would like to keep running it if i can save it and show up all the chevys

 

Under the circumstances it sounds like you broke a bolt on a bearing cap. Remove the oil pan and see if you have a bearing cap hanging loose.

If it is a hanging cap then the force of the cap impacting on the block will usually bend the crank. It may be time for a replacement engine.

Try turning the engine backwards just a little. Yes, I know this is a bad thing to do, but if this is a hanging cap then the engine will turn freely backwards for a bit. If it turns backwards and then turns forward and stops again then there is almost no doubt that it is a broken cap or connecting rod.

 

I hope you can get the problem fixed, you are probably going to have to open the engine up anyway to do repairs. Good luck and welcome to CO.

 

Welcome aboard

All I can say is "Ouch"

Ya need to take a look see .

 

thank you for the welcome and replies, I will pull it out and tear it down, i did try turning the crank both ways but it wont move, if it got too hot would an olds engine sieze up like that? if i do need to replace it what would be the best model of car to try to find with a decent HP out of the engine.

Thanks Rayce

 

I had a 283 turn a bearing , one crank bearing slid under the other and she siezed tight. i was driving down the road when it did it and she just stopped , no sputter or anything just silence. had to turn the crank and add new bearings. i assume you did not run it out of oil or water , and it would have to be hot for longer than it was to seize the motor.

 

Thanks wolfman, i will post what I find out when i get it out and apart, all the fluids were 100% and new,the only bonehead thing i found was it still had a thermostat in it that i should have removed before racing, i will kick my self for a while if that's what caused it