Lsx main bearing problem questions with pic
Lsx main bearing problem questions with pic I took this picture of the main cap out of a 454 lsx engine.
This is a Clevite main bearing.
I have not inspected the rest of the engine yet.
What would cause the leading edge of the bearing to loose material like that?
The crank is in near perfect condition.
This is a Clevite main bearing.
I have not inspected the rest of the engine yet.
What would cause the leading edge of the bearing to loose material like that?
The crank is in near perfect condition.
Woould crank end play just damage the edge of the bearing like that?
I though maybe a piece of trash or something had damaged the bearing.
Going to pull the rest today and look at them.
I though maybe a piece of trash or something had damaged the bearing.
Going to pull the rest today and look at them.
bearing wear Either the main bearing bore is tapered or the crank is tapered. You need to check both to be sure.
If the block is the problem (most likely) get it align honed or align bored to correct the problem. If the main bearing journal is tapered or out of spec. (less likely) the crank will need to be ground.
Steve
[/quote]
If the block is the problem (most likely) get it align honed or align bored to correct the problem. If the main bearing journal is tapered or out of spec. (less likely) the crank will need to be ground.
Steve
[/quote]
__________________
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
FormerVendor
Joined: Dec 2005
Posts: 250
Likes: 1
You didn't say, but is it #4 with the wear toward the front of the engine or sometimes #2 with the wear toward the rear? #1 with the wear toward the front if you are running a blower or something off the front of the engine that abnormally loads the snout.
Check the housing bore and journal for taper like Steve said, but sometimes this still happens even if they are straight due to crank flex especially on a 4.125" stroke.
Not much you can do except give it a little more clearance to flex without upgrading the crank.
Check the housing bore and journal for taper like Steve said, but sometimes this still happens even if they are straight due to crank flex especially on a 4.125" stroke.
Not much you can do except give it a little more clearance to flex without upgrading the crank.
This is cap #3.
The engine is N/a around 10000 miles on it.
The engine started its life as a 454 from scroogin-dickey.
The cam bearing seems to have similiar wear on it.
The block is off to the machine shop for inspection.
The engine is N/a around 10000 miles on it.
The engine started its life as a 454 from scroogin-dickey.
The cam bearing seems to have similiar wear on it.
The block is off to the machine shop for inspection.
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