[jenny281]

What is the appropriate thread sealant to use for a PCV valve? The OEM valve is plastic and threads into the aluminum surge tank. I have a 2012 Genesis Coupe 3.8L V6 if it matters. Should I be using thread sealant that has PTFE (like Permatex 80632) in it or is regular thread sealant ok?

 

[camper]

you can use thread sealing tape. Don't use grease type sealant they may ruin the threads when you try to unscrew it

 

[jenny281]

you can use thread sealing tape. Don't use grease type sealant they may ruin the threads when you try to unscrew it

I've not used thread sealing tape on any auto related items. I assume it is the same as PTFE plumbers tape. Will wrapping it around once or twice suffice?

What is the reason grease type sealant ruins threads? I thought it was fairly compatible with plastic.

 

[kpanasew]

It's a very fine thread; you don't need any tape or sealant. It also pretty much lives in an oil-rich environment so seizing isn't much of a concern.

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[jenny281]

It's a very fine thread; you don't need any tape or sealant. It also pretty much lives in an oil-rich environment so seizing isn't much of a concern.

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I assumed the sealant is more for ensuring air doesn't escape past the threads and that it doesn't come loose rather than for seizing. Do I have the purpose of it incorrect?

 

[mmahamm]

I assumed the sealant is more for ensuring air doesn't escape past the threads and that it doesn't come loose rather than for seizing. Do I have the purpose of it incorrect?

You have it correct. That's why I would use thread sealant.