spun rod bearing, what's the best/cheapest option?
06-18-2012, 04:13 PM
#1
spun rod bearing, what's the best/cheapest option? I tore my LS6 engine out, and my dad (he's been a mechanic for a very long time, and left the game) and myself looked at the crank, and sure enough there's at least one spun bearing. 0 marks on the cylinder walls, everything looks fine up top. What is the best/cheapest option to get it done?
Getting the crank machined, and oversized bearings put in place?
Getting a new crank, and forged pistons and rods?
Buying an LQ9 370 C.I motor for around 2,100 shipped?
At this point, I'm fine with the power the car made before it blew up, and would like to just ensure durability. I know the LQ9 is likely the most expensive, but also the most durable.
My main issue with getting this current block repaired, is I absolutely want the better cam bearings installed.
Edit:
The car is on 04 CTS-V, with PRC Stage 2.5 heads, and a TSP MS3 cam.
Getting the crank machined, and oversized bearings put in place?
Getting a new crank, and forged pistons and rods?
Buying an LQ9 370 C.I motor for around 2,100 shipped?
At this point, I'm fine with the power the car made before it blew up, and would like to just ensure durability. I know the LQ9 is likely the most expensive, but also the most durable.
My main issue with getting this current block repaired, is I absolutely want the better cam bearings installed.
Edit:
The car is on 04 CTS-V, with PRC Stage 2.5 heads, and a TSP MS3 cam.
06-18-2012, 06:17 PM
#2
If the crank or rod overheated enough to discolor, they're trash. Look for blueness.
Any replacement of the crank warrants a line hone of the crank bore...in conventional wisdom. LS may not need it as a procedural matter with all the spiffy laser measuring they get a the factory, but I'd at least have a machinist check it carefully before assembling w/ a new crankshaft.
Did you determine the cause of the bearing failure?
Any replacement of the crank warrants a line hone of the crank bore...in conventional wisdom. LS may not need it as a procedural matter with all the spiffy laser measuring they get a the factory, but I'd at least have a machinist check it carefully before assembling w/ a new crankshaft.
Did you determine the cause of the bearing failure?
06-18-2012, 06:54 PM
#3
Check the align as this man said^^.
Verif rods/ends are round.
Buy a used LS1 crank. People upgrade to forged, they're plentiful and you can find a good deal.
Get the bearings of your choice, then verify clearances.
Between you and your dad, you'll save lots of money!
Verif rods/ends are round.
Buy a used LS1 crank. People upgrade to forged, they're plentiful and you can find a good deal.
Get the bearings of your choice, then verify clearances.
Between you and your dad, you'll save lots of money!
06-18-2012, 09:13 PM
#4
I'd actually like to have a shop do it, even if I'm paying a premium, that way there's a warranty, and I'm kind of leery about buying used anymore.
None of the crank has turned blue.
that was in the bottom of my oil pan
what would I expect to pay a shop to remove my crank, machine it, install new bearings all over (cam, and rod), and new STOCK (not moly) rings, and quite possibly forged pistons, and reassemble?
None of the crank has turned blue.
that was in the bottom of my oil pan
what would I expect to pay a shop to remove my crank, machine it, install new bearings all over (cam, and rod), and new STOCK (not moly) rings, and quite possibly forged pistons, and reassemble?
