ArKay99

iTrader: (1)

I bought a new Lingenfelter 403 and asked to have the pilot bearing installed in the crank. When I went to install the flywheel I found out I didn't have the pilot bearing. Ok, I'll do it myself. No big deal. I called the salesman and told him and they sent one out to me. What I got was GM part 12557583 which is listed in the parts inventory as a clutch flywheel pilot bearing. In my parts manual the part number for the pilot bearing in my crank is 14061685 and is also listed as a clutch flywheel pilot bearing. The pilot bearing I was sent will fit into the end of the crankshaft, but in the outer area, not the inner area that the pilot bearings usually go in.
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Is this an LS2 or LS7 pilot bearing? I am going to go and try to find one locally tomorrow because the motor has been in my garage for over a week and I want to get it in. I just want to know what to tell Lingenfelter on Monday morning.
LS1 pilot bearing in crank


Bearing I was sent 12557583

Closeup of the bearing I was sent



Any help would be appreciated.

brad8266

iTrader: (23)

That new bearing does not look like a pilot bearing at all. The one in the crank already is a pilot bearing. Unless the LS2 has some weird **** back there.

-Joseph-

iTrader: (12)

Thats a LS2 Pilot bearing for a C6, I would think the LS7 to be the same. No C5, Fbody or GTO came with that bigger bearing though so unless your motor is actually going in a C6, then you have the wrong bearing.

ArKay99

iTrader: (1)

Thanks. Now I'm getting worried they put a 58 tooth reluctor in my new motor. Any way to check that without pulling the oil pan?

-Joseph-

iTrader: (12)

You can look through the crank sensor hole. If the reluctor wheel looks like 2 plates side by side with longer 1/2" lugs (rotation wise) its the 24x, if it looks like one single plate with about 1/4" lugs its a 58x.

Or if you post up a pic one of us can ID it for you easily.

LS1curious

Run a Bronze Oilite Bushing. Sound like backwards technology until you have one of those rollers sieze up at High Rpm making the trans a nightmare to shift.

XtraCajunSS

iTrader: (2)

That is also the bearing for the CTS-V.

ArKay99

iTrader: (1)

Actually, I did that today. It's a 24x. Thanks for the description. Whew! Had some pucker factor there.

gun5l1ng3r

Could a seized pilot bearing cause what seems to be a clutch disengagement issue?

I kinda pounded on the Pilot Bearing a little bit with a socket and hammer when I installed it about 30K miles ago...

See5

iTrader: (53)

You definitely need a C5 pilot bearing. Even local autoparts will have them. The LS2,LS7 etc may even look right but it will be trouble.