IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: larrym on January 29 2015, 01:39:59 AM
-
Pulled the thrust cap off the motor that was in my car.
It always had a vibration at about 3000 rpm it pulsed figured it was a balance issue from the previous owners rebuild.
Would a rotating assemble out of balance cause wear like this?
-
that looks like a spec of crud beneath the bearing.
....assUming the bores are nice and round and true and the crank is straight and the journals are nice and round and true.
-
Nice fretting on the caps too :P
-
Larry...not sure if an engine imbalance would cause that. The original engine in my car had a heckuva vibration to it...never thot to ask Joe what the bearings looked like when he freshened it up for me. That engine is the one I`m currently beating on...and I always have Joe balance the rotating assemblies on all my engines.
-
Scoob! If I recall in your engines the Bearings always look evenly worn. I can always save them for you next time.
-
Scoob! If I recall in your engines the Bearings always look evenly worn. I can always save them for you next time.
I learned early on to get off the loud pedal if I see a hint of KR....cuz it`ll turn bearings into tinfoil in a heartbeat. I have Joe magnaflux the block, rods and crank...and the crank and rods are checked for straight. If an align hone is required...the n it`s done...along with the deck being checked for straight. The big ends on the rods are also checked for size...and the rotating assembly balanced. I leave the bearing clearances and ring gaps up to Joe. He does the oiling mods to the cover and sets the oil pump clearances.
Getting back on track. Larry, it`s hard to say if the clearances were correct in that engine...or how much KR it saw.