98 LS1 Rod and Main bearing replacement - HELP!!
10-19-2013, 11:30 AM
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98 LS1 Rod and Main bearing replacement - HELP!! Hey guys, doing an LS1 swap into my 69 chevelle. I tore the motor down to do a cam/timing/head/intake swap etc. Also replacing all gaskets. While i have it down this far and the oil pan off i was wondering if i should replace the Rod and Main Bearings?? If so, is there a thorough how to or would it be easy enough for me to do in my garage with the basic tools?? or am i better off leaving them alone if ive never done it before?? the engine has 70k miles on it.
Thanks!
Thanks!
10-19-2013, 11:33 AM
#2
Basic tools = no.
You need some specific tools. And once you break the engine down, you really need to blueprint it upon reassembly. Those tools are costly to accurately measure your bearing clearances and tolerances. If the bearings are fine (and I suspect they are at 70k miles) then you're not really fixing anything. Replace bearings if they need to be replaced or you need a difference size because you ground the crank journals down or resized the rods.
You need some specific tools. And once you break the engine down, you really need to blueprint it upon reassembly. Those tools are costly to accurately measure your bearing clearances and tolerances. If the bearings are fine (and I suspect they are at 70k miles) then you're not really fixing anything. Replace bearings if they need to be replaced or you need a difference size because you ground the crank journals down or resized the rods.
10-19-2013, 12:27 PM
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Basic tools = no.
You need some specific tools. And once you break the engine down, you really need to blueprint it upon reassembly. Those tools are costly to accurately measure your bearing clearances and tolerances. If the bearings are fine (and I suspect they are at 70k miles) then you're not really fixing anything. Replace bearings if they need to be replaced or you need a difference size because you ground the crank journals down or resized the rods.
You need some specific tools. And once you break the engine down, you really need to blueprint it upon reassembly. Those tools are costly to accurately measure your bearing clearances and tolerances. If the bearings are fine (and I suspect they are at 70k miles) then you're not really fixing anything. Replace bearings if they need to be replaced or you need a difference size because you ground the crank journals down or resized the rods.
any other opinions out there?
10-20-2013, 11:44 AM
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No, I would leave it, with 70k miles the bottom end is still fresh.
10-22-2013, 02:33 PM
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If there was any significant rod bearing damage You would have had a knocking sound that would have gotten worse very quickly and within a week of first hearing it if You kept driving it it would have broken a rod . If You've done alot of hard take offs and generally driving it hard then the mainscould be worn ,,,,if They are when accelerating fairly hard somewhere between 2500-3500rpm's You can hear worn mains. They kinda sound like maybe a wheel bearing ,,,,,,,kind of a medium to high pitched moaning that happens like described earlier.
