Stepper motor - how tight is gently tight?

[rolling_thunder]

yep its noob question time....

When i removed the stepper motor for cleaning, it was a little more than hand tight. I have just cleaned the stepper motor and replaced it tightening it to about the same degree. I now notice that the revs have increased from a steady 1000 to a steady 1200.

So before i remove it again and make sure there is no loose debris in there (this time I will also fit some ptfe tape onto the thread) I wondered how tight other folk do it up as it appears a slight air leak might affect tick over.

Obviously i know i have to be carefull of cracking the casing... so i imagine a 'tweak' with a spanner will suffice. IS that about right

Thank you ppl

RT

[That Daddy]

Yes,just a small nip up,if your worried about it coming loose then put a couple of drops of thread lock(the blue one,not RED) on the cleaned threads;)

[DavidLScott]

Not as tight as I did mine a couple of years ago

Make sure you just nip slightly beyond finger tight but no more. I have heard about putting PTFE tape on the thread to help the seal.

Had to get the broken stub removed by the dealer but the car still ran perfectly OK on the way there.

[MikeTVR]

PTFE tape proved disastrous to me. The thread section parted company from the rest of the body and was tricky to retrieve from the plenum. I only used a small amount of tape so beware. Hand tight is all I do now, but there should ideally be a sealing washer.

Mike

[rolling_thunder]

Cant imagine why it would have stripped the threads - the tape is incredibly thin. Gas fitters wind a load of it around threads to get a good seal. But no matter I always listen to advice.

I have now cleaned the fibre washer, wrapped a single layer of PTFE on the thread and given the motor a "tweak" with a spanner and the revs have dropped back to the original 1000 so I am happy.

Thanks to all

RT