Toyota 90915-YZZN1 ADBV Composition

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What is the composition of the Toyota 90915-YZZN1 ADBV? Denso's website states they use 'silicon' ADBVs.

Thanks!
 

jburg318

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Just received this from a local parts dept.

Looks like its silicone. Makes sense for the extended drain intervals and synthetic oil specified by Toyota.

Screen Shot 2021-10-14 at 8.35.27 AM.jpg
 
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What is the composition of the Toyota 90915-YZZN1 ADBV? Denso's website states they use 'silicon' ADBVs.

Thanks!
The Denso's aftermarket oil filters are made in China and have a reddish anti drainback valve. They also come on some new Toyotas with a Toyota logo, still made in China.The N1 greenish hue adbv could be silicone, or high temp nitrile. I would vote for the latter. The email says silicone but it isn't from the maker, so it's a second hand source. They saying it's silicone doesn't mean it is. The factory knows what it is. I never had a Toyota adbv get hardened or show any kind of defect, so it really makes no difference. I suspect it is their special blend of nitrile. Nitrile is not a bad thing.
 

jburg318

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The Toyota 90915-YZZN1 is made in Thailand. The ones on the vehicle from the factory are made in China - Part No 90915-10003.
 
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There are a few with pics on ebay. The ADBV shows up as black. I doubt it is silicone. Passed on this part for my gf upcoming 2018 camry coming off toyota care plus. The filter is mounted sideways and ph4967 was only 3.88.
 

jburg318

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Cut open shows that it is actually olive green:

 
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Most likely a “siliconized or nitrile rubber”. What % of silicone qualifies the ok to put on paper that it’s a silicone bypass?
 
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Just another food for thought. I would like to believe that synthetic engine oil in itself would be less harmful to “natural”rubbers hence the reason a lot of car manufacturers fringe on oil additives and flushes that contain other chemicals. Google it you’ll be surprised what you’ll find.
 
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The freezer test would be a way to determine the ADBV flexibility at below zero. I did this between a known nitrile and know silicone ADBV, and the difference in flexability at -10F was very obvious.
 
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