Pros and cons of Dielectric grease for hv pack vehicles living in wet areas

Just a chinwag thread about pros and cons of greasing hv packs for vehicles in wet areas and coastal towns .. I know addressing the water in cabin is #1 but would it hurt to grease the pack? I have seen more than my share of nasty corroded gen2 packs and the problem is only getting worse as the cars age, I'm nearly at a stage where I don't even want to touch cars that have come from coastal areas..

Last time I asked this question (about 5 years ago) most agreed it's best to just leave the pack clean and dry but most that commented back then lived in hot dry areas and corrosion was just not an issue for them, for me nearly every gen2 pack I look at these days is green and nasty I'm thinking it's maybe time to start using electric grease on bus bars and voltage sensing connectors as prevention if it's not going to actually hurt anything.

Please chime in with pros and cons

Cheers

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hi TMR thanks for chiming in

I have a couple spare harness and hv ecu in my hoards that's not a problem mate, its just keeping them nice once they are in service that's on my mind

the problem with grease and chemicals is they are a but messy which makes it a bit annoying the next time you have to go back inside the pack! im starting to think it might be better to clean a little mess than deal with complete loss of ecu and harness

 

Thanks for replies all ..

Only seeing massive corrosion on the ecu connector after a couple years If the car is getting wet inside the cabin, or lives near the coast, bus bars are near always nasty on prius specially if the modules are getting past about 12 years old, I very rarely if ever see a clean pack come out of a gen2 prius around here.

Also if a pack has been previously rebuilt and the copper bus bars cleaned up the corrosion loves to get all over the fresh raw copper nearly instantly, like in a couple months! the only way to fix that would be nickel or electro plating I guess

50 series camry packs seem to have way less of a problem with corrosion they are mostly spotless

40 series camry packs can be clean too but test results on the modules are nearly always very disappointing

Redline gear oil hey, cheers i will check it out..

Mendel the plastic dip idea sounds good and would be pretty and perhaps combat the issue but potentially cause resistance as it's more than likely non conducting and would act as an insulator




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Cheers I still haven't decided if it's worth the mess, or if it will even work to combat this issue..

Leaning towards leaving the battery clean and dry and start using nickel plated bars, maybe just a little spray of water dispersant on the hv ecu connector for an experiment (once I confirm it's definitely not conductive)

Its time consuming but really helps to thoroughly clean all rear interior and the floor pan of debris.. of course seal hatch at roof if it leaks then when it all goes back together throw a couple of those moisture trap things with the beads in them that you can buy at $2 stores near the battery at the ecu end, and replace as necessary

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Cheers ed, if I decide to use grease I will check out the redline

Matt

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