cinciaz

Got a 2001 with chrome rims. On page 3-92 of the service manual it states to tighten the lug nut in sequence ( which is not a star pattern ) and tighten to 100 lb ft. On page 3-98 it states to tighten the lug nuts in a criss/cross pattern to 140 lb ft. Well we all know to criss/cross. So what is up with the two different torques.

rrichar2591

Not sure why but it's always been my understanding that the 100 foot pounds is the correct number.

thisMSGgood4me

My owner's manual says 100 lb ft.

Lee DeRaud

Look again, it's the same torque spec: 100 ft-lbs (English) = 140 N-m (metric).
(And "in sequence" refers to the diagrams, the 5-bolt one is a star pattern.)

ragged claws

100 ft.-lbs. is what the manual for my 02Z says as well.

65GGvert

Congrats on reading the manual, many don't try that first. Just some info, if you have chrome wheels, they are aftermarket or have been chromed since made. C5's came with polished aluminum wheels with clear coat over them. Except for 01-03 Z06 which were painted.

cinciaz

OK. my bad on the chrome wheels they are the stock aluminum with clear coat. thanks for the clarification on page 3-92. if any body has a manual im not kidding, page 3-98 says tighten to 190 N-m ( 140 lb ft )

Vetteman Jack

I've always torqued my wheels to that number.

ironranger

Not sure what manual you're looking at. I've got the 2001 Corvette Owner's Manual and the lug specs are on page 6-75 and spec 100 lb-ft (140 N-m). The pages you reference are NOT in the manual and section 3 only goes through 3-32!

ironranger

Sorry, I didn't notice that you are referencing the SERVICE MANUAL until after I sent the above response. Owner's Manual specs are what I have used!

jrose7004

Mine too.

65GGvert

03 says the same.

Lee DeRaud

Possible typo...what year is it? (I was quoting from a 2004 service manual: its page numbers are one off from what you gave.)

dadaroo

YOU are NOT crazy or confused. My 2001 Service Manual says the same thing. They TOTALLY contradict each other. 100 Ft-lbs in sequence versus 140 Ft-lbs criss cross.

I have found some other errors in the FSM but they have been in the schematics.

4XLR8N

Errors happen in Service Manuals. Dealers are sent bulletins to correct these errors that are discovered after printing. Those of us (private individauls) who have manuals do not get these bulletins.

Correct spec is 100 ft/lbs in the standard 5 point star (criss cross) pattern.

I NEVER use an impact to install lug nuts. I would also advise torquing in two steps, first to 50 ft/lbs then to the full 100 ft/lbs. Probably overkill, but I have never warped a rotor!

dadaroo

Not overkill, but the proper way to torque joints. I use 3 passes when doing lug nuts. I use more passes when critical gasket joints are involved. This is standard practice in industrial applications. Procedurally mandatory in the Nuclear industry.

emccomas

Not overkill.

I do 50, then 75, then 100, then 100 again.

thisMSGgood4me

Torquing in steps, whether two or three or more, while not required, is best practices.

leadfoot4

cinciaz

Thanks everyone for your input, never thought of a typo.I did do three passes and they are all nice and tight at 100.......