Question : Thrust Bearing: Gen II; 2.8 V6

[85_Olds_Ciera]

I was installing a timing chain and pushed on crank...which slide over a pinch before stopping. 151,000 mile engine. In next several weeks, I'll be taking off pan, but any reason why thrust bearing would shoot craps on 125c automatic?

[geoffinbc]

Did you measure the actual thrust play? Your allowed up to .010" of end play.

[85_Olds_Ciera]

Did you measure the actual thrust play?

I pushed crank inward with my hand...when it went Plunk, I had a flashback to a 1980 VW Rabitt Pickup I had...I ended up pulling the crank out, and taking it to a crank shop that does submersible welding.

When one hears the crank goes plunck...you just know it ain't good.

[geoffinbc]

Its funny you posted that link. I do the same thing at work. Although our equipment is quite a bit more modern. Well if it is has that much play something sounds broken.

[85_Olds_Ciera]

that much play something sounds broken.

Just got Beretta up on blocks tonight...maybe within week I'll know more.

[85_Olds_Ciera]

Did you measure the actual thrust play? Your allowed up to .010" of end play.

1.11 mm (0.044")

Crankshaft End Play 0.05-0.20

Appears to be in spec....I'll slap a new oil pump in it, and see what happens to oil pressure

[geoffinbc]

That 0.05mm to 0.2mm not inches. Your cranks thrust is way out of spec if you have measured correctly. If that were inches then the maximum tolerance would allow the crank to move fore and aft almost 1/4".

[85_Olds_Ciera]

That 0.05mm to 0.2mm not inches...

Crap, crap, crap...yes, measurement is in mm, not inches....

>measured correctly

1.11 mm

[85_Olds_Ciera]

Thanks

Could I get by with just main bearings?

[pocket-rocket]

A main bearing set would include a thrust bearing. I'm not certain if main bearings are like rod bearings where as once you develop crush on them you shouldn't disassemble and reuse them. Once the rod bearings have been "crushed" from installing and proper torque, you can risk spinning them by reusing them after a disassembly. If you are going to do one, you may as well do them all, including the rod bearings. Just my $.02

[85_Olds_Ciera]

Your cranks thrust is way out of spec if you have measured correctly.

No need to measure, two pictures work just fine.

Picture One - On harmonic balancer side...no wear.

Picture Two - On automatic transmission side...that auto was exerting a force on it for some time...maybe OEM transmission,.


Oh well, I wish I could drop the crank out of it, but having auto transmission in place prevents it.

Question - If I unbolt torque converter, any chance crank might "fall" a pinch? (Starter ring can't drop more than 1/2 inch).

Question - Any tricks to remove upper bearings with engine/transmission in place...other than a rivet?

[85_Olds_Ciera]

once you develop crush on them you shouldn't disassemble and reuse them.

Thanks for tidbit...

[85_Olds_Ciera]

If you are going to do one, you may as well do them all, including the rod bearings. Just my $.02

I had a relative/mechanic roll them in today; of course, thrust bearing was wore out, and number six rod bearing had excessive wear. He speculated oil starvation on number six rod. Just in time maintenance, hey