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Query on C5 TPM sensor nut torque setting


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Yellowshark

Club Member

Sun 21 Jan 18 11:09

Query on C5 TPM sensor nut torque setting


Hi, I am about to renew the TPM sensors on my Export MY2001. Now last night I saw this in the FSM…
For Domestic vehicles tighten the nut to 35 lb in
For Export vehicles tighten the nut to 106 lb in

Yes, that is 35 vs 106. Searching around the major suppliers I see no such differentiation in the nut used nor the grommet. I assume the valve stem size and thread are the same for Domestic/Export. My assumption had been that the difference between the two parts was just the radio frequency used.

So why is the torque setting different, let alone by so much, anyone know? I am assuming I will need to give a torque setting to the guys in the tire shop – maybe I just say tight!


Also does anyone know if the sensors changed from C5 to C6? I have three sensors with shiny alloy valve stems, as per the originals on my C5, but the fourth has a black stem.

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roppa440

Club Member

Sun 21 Jan 18 12:59

Re: Query on C5 TPM sensor nut torque setting


Bollocks. Just tighten it.

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chevrolet

Club Member

Sun 21 Jan 18 15:04

Re: Query on C5 TPM sensor nut torque setting


Did the sensor change from the C5 to the C6? My quick guess would be "Yes." That's on the basis that you could program/activate the sensors using a magnet on the C5 (so I have read), but need a scan tool to activate C6 sensors.

Suspect if you look on the RockAuto website, you will find they are different part numbers?



Last edited by chevrolet on Sun 21 Jan 18 15:33; edited 1 time in total. [1 %]
--------------------
AKA "Silver C6" on Pistonheads

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roppa440

Club Member

Sun 21 Jan 18 22:38

Re: Query on C5 TPM sensor nut torque setting


Yes c5 and c6 are completely different.

Plus on the C5 (as with anything to do with radio frequencies) you have USA frequency systems and Euro frequency systems. Same as the key fobs.

You should be able to find the part numbers concerned via a search on here as I know it has been discussed in detail at some point.

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Yellowshark

Club Member

Mon 22 Jan 18 09:44


Thanks guys; yes a magnet is used for registering the C5 sensors. There is a thread somewhere on the part nos. but I already have the sensors so not an issue. I think I will go with then more laid back approach and then if it leaks just tighten it some more!

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roppa440

Club Member

Mon 22 Jan 18 09:51


Yellowshark wrote (View Post):Thanks guys; yes a magnet is used for registering the C5 sensors. There is a thread somewhere on the part nos. but I already have the sensors so not an issue. I think I will go with then more laid back approach and then if it leaks just tighten it some more!

It's just a rubber plug on the bottom of the stem filling the hole in the wheel. It does not need to be very tight to seal. Once you have air pressure in the tyre it holds it in place anyway.

I took the nuts off mine to polish them with no loss of pressure from the tyre.

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C6NL

Club Member

Wed 24 Jan 18 19:27


roppa440 wrote (View Post):Yellowshark wrote (View Post):Thanks guys; yes a magnet is used for registering the C5 sensors. There is a thread somewhere on the part nos. but I already have the sensors so not an issue. I think I will go with then more laid back approach and then if it leaks just tighten it some more!

I took the nuts off mine to polish them


Polishing your nuts, that is dedication Thumbs up

On a more serious note, here's what GM has to say about TPMS sensor torque for the C6

GM torque specification for valve cores is 4 in lb (0.45 Nm)

Valve stem nut torque 62 inch-lbs (7 Nm)


Image



Last edited by C6NL on Wed 24 Jan 18 19:29; edited 1 time in total. [10 %]
--------------------
Callaway Honker
Ported throttle body
Ported intake
Crane Cams 1.8 ratio rockers
Kooks Jet Hot coated headers
Pfadt Johnny O'Connel shocks
Hotchkis sway bars
Diablosport Trinity with custom tune
Brian Tooley Racing valve spring kit

When launching and stopping this beast, passengers may experience temporary black-out due to "G" forces
caused by acceleration and deceleration speeds faster than what they are normally accustomed to.

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roppa440

Club Member

Thu 25 Jan 18 08:44

Re: Query on C5 TPM sensor nut torque setting


The rubber grommet on the C5 sensor is a better seal than the C6 version by the looks of it.

The C5 one is rounder and a tight push fit in the hole.

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roppa440

Club Member

Thu 25 Jan 18 08:48


C6NL wrote (View Post):
Polishing your nuts, that is dedication Thumbs up


I have chrome wheels and the nuts were black with dirt and corrosion plus black caps.
So I bought a set of alloy caps and polished those as well as the nuts so they blend into the wheel better.

Little details, little details.... Yes

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Yellowshark

Club Member

Thu 25 Jan 18 13:57

Re: Query on C5 TPM sensor nut torque setting


Details indeed, until those alloy caps get stuck. The first job I did on my 2001 after collecting it from the showroom was to replace those caps with black plastic ones; which of course match the tyres giving a pleasant overall harmonious look. Thumbs up

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