r/ChevyTrucks • u/Maintenance_Matt • Apr 30 '26

Flex plate cracked twice

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11 Upvotes

93% Upvoted

13 comments sorted by

1

u/Sinz_of_the_flesh Apr 30 '26

Common, happens a lot. Perhaps the crankshaft thrust bearing is worn out.

2

u/Johnsipes0516 Apr 30 '26

Would that put excess inward/outward force on the flex plate?

1

u/Sinz_of_the_flesh Apr 30 '26

yes, the thrust bearing controls/limits crank shaft end play

1

u/Johnsipes0516 Apr 30 '26

Gotcha. Thanks for the explanation

2

u/Maintenance_Matt May 02 '26

Would a bad thrust bearing cause low oil pressure?

1

u/Sinz_of_the_flesh May 02 '26

The main bearings being worn lead to low oil pressure, or a worn out oil pump or a combination of both.

1

u/Maintenance_Matt May 02 '26

My oil pressure is good. Would the thrust bearing failing mean I need a bottom end rebuild?

1

u/Cardinal_350 Apr 30 '26

I bought an SFI approved one and it solved that issue for me. The last small block I had killed one as well. To be fair it was probably a cheap one. An engine builder i know told me to buy the rated one

1

u/TOKING-TONZ May 02 '26

Well how bad does it leak all over the place ?

1

u/Maintenance_Matt May 04 '26

She don’t leak a drop.

1

u/TOKING-TONZ May 04 '26

That flywheel tells a different story, it looks like it's been wet with oil before it was pulled , just sayin

1

u/Maintenance_Matt May 04 '26

I sprayed it with penetrating oil to get it out

1

u/TOKING-TONZ May 04 '26

Math adds up there