before a bearing failure are there any signs

**qwik219d9** · 03-23-2009, 04:31 AM

I reading here that crank bearing failure is common on the LS1 if it happens then the engine seizes ruining the block right?

before a bearing failure are there any signs like will the engine make noises like giving you clues that a bearing is loose and is about to fail?

Thanks

**Sarge** · 03-23-2009, 04:49 AM

An oil analysis will show you precisely what is going on to the detail and remove any and all doubt.
http://www.blackstone-labs.com/free_test_kit.html
Bearing failures are not "common" at all. Bearing failures due excessive oil change intervals, wrong viscosity causing bearing failure are much more common. The LSX bearing/crank design is excellent.

**tbias** · 03-23-2009, 04:52 AM

Id say low oil pressure would be a good first sign. When bearings start to wear down they act as a new pathway for oil to travel. Thats when the good ol "spun bearing" comes into play.

**qwik219d9** · 03-26-2009, 04:10 AM

OK so the noise I've been hearing for a few years must be something other than a crank related noise?

I usalley change my oil at 3K even tho it's designed to last longer when it gets to 3K I'm usalley down by 1.5 quarts anyway.

During cam swap I swaped the oil pump with a GM LS6 pump
? how many miles are they good for?

? when a oil pump goe's south is it gradeuale (like giving signs, noises ect.)
I'm assuming the preasure drops but do'es it stay low for a while.

The oil analysis sounds interesting.

Thanks

**krazykarl454** · 03-29-2009, 08:54 AM

is the noise only at start up? maybe some light piston slap till it gets warm. both my dads 6.0s do that. the low oil psi is a good sign too. whats ur psi at cold idle, and then at hot idle? and the oil analysis is the way to go. i maintain a fleet of around 80 trucks. and every oil change we send the oil out to be tested. and they send you back a sweet chart of every thnig they found in the oil and how much of it, also it compares it to the previous oil sample they had.