Possible Seized Engine - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

sstock6.2 · 12-01-2021, 05:03 PM

Did my cam install, converted motor from l99 to ls3, got a base tune and started the car and after hearing what sounded like piston slap, I turned it off, and now the car won’t crank, but will turn by hand. Pulled the plugs and coolant leaked out of the spark plug hole on cylinder #8. I had changed every gasket, fluid, and the plugs, so i’m really at a loss and don’t think I have any choice but to pull the motor again and hope the supercharger isn’t damaged. I don’t know what to do at this point I feel like i’ve really ****ed something up and I know this is probably a pointless post, I just don’t know what else to do. I’m also new to this site and don’t know how to post a video with sound to show what the noise sounded like.

gtstorey · 12-01-2021, 05:07 PM

Did you put thread sealant on the head bolts? I think at least some of them require sealant.

sstock6.2 · 12-01-2021, 05:10 PM

Quote:

Originally Posted by gtstorey

Did you put thread sealant on the head bolts? I think at least some of them require sealant.

I bought all new ARP bolts and used sealant on all of them

gtstorey · 12-01-2021, 05:18 PM

Hopefully you didn't hydrolock your motor. I think you need to pull that head and see what is going on.

Batmanntexas · 12-02-2021, 03:42 PM

At what point were you able to turn it by hand? Before or after pulling the plugs? If it were after, then I would agree that one, or more, of the cylinders hydro-locked. With the plugs out, the starter should be functioning normally.

When the heads were off, prior to re-assembly, did you clean & blow out all of the head bolt holes with brake cleaner & compressed air?

It could be something as simple as an improper/faulty head gasket, or worst case, you have a cracked block or cylinder head.

Keep us updated!

-Scott

Moto-Mojo · 12-03-2021, 01:19 PM

Man, I hope you get it sorted out. I’d love to be able to do my own cam job but... https://youtu.be/_VrFV5r8cs0

12-01-2021, 05:03 PM	#1
sstock6.2 Drives: Camaro 2SS Join Date: Nov 2021 Location: Tempe, AZ Posts: 14	Possible Seized Engine Did my cam install, converted motor from l99 to ls3, got a base tune and started the car and after hearing what sounded like piston slap, I turned it off, and now the car won’t crank, but will turn by hand. Pulled the plugs and coolant leaked out of the spark plug hole on cylinder #8. I had changed every gasket, fluid, and the plugs, so i’m really at a loss and don’t think I have any choice but to pull the motor again and hope the supercharger isn’t damaged. I don’t know what to do at this point I feel like i’ve really ****ed something up and I know this is probably a pointless post, I just don’t know what else to do. I’m also new to this site and don’t know how to post a video with sound to show what the noise sounded like.

12-02-2021, 03:42 PM	#5
Batmanntexas Drives: 2012 Camaro SS (2SS) Join Date: Aug 2012 Location: Stafford, VA Posts: 1,394 View My Garage	At what point were you able to turn it by hand? Before or after pulling the plugs? If it were after, then I would agree that one, or more, of the cylinders hydro-locked. With the plugs out, the starter should be functioning normally. When the heads were off, prior to re-assembly, did you clean & blow out all of the head bolt holes with brake cleaner & compressed air? It could be something as simple as an improper/faulty head gasket, or worst case, you have a cracked block or cylinder head. Keep us updated! -Scott __________________ 745RWHP/634RWTQ on 93 @ 10psi 806/676 on E85 @ 10psi Currently @15-16psi.... COTW 9/8/14

12-03-2021, 01:19 PM	#6
Moto-Mojo Fast Cars and Old Guitars Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012 Location: N. CA Posts: 4,210	Man, I hope you get it sorted out. I’d love to be able to do my own cam job but... https://youtu.be/_VrFV5r8cs0 __________________ “I don’t want to belong to any club that would have me as a member.” - Groucho Marx

12-01-2021, 05:07 PM	#2
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,438	Did you put thread sealant on the head bolts? I think at least some of them require sealant.

12-01-2021, 05:18 PM	#4
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,438	Hopefully you didn't hydrolock your motor. I think you need to pull that head and see what is going on.