RITE

The o-ring is made of hard plastic, and I want to replace it. I measured the sensor, and its 13/16in on the outside, and 11/16 inside where the o-ring sits. Based on those dimensions, what size o-ring do I need? Also does the material matter? I saw nitrile rubber o-rings only handle 107c, is that good enough, or will the disintegrate with engine heat?

98maxBK

I had the same leak it’s very common. I replaced the o ring several times with all different o-rings and leak kept coming back. Bit the bullet and put the $10 one from the dealer in. Leak free over a year and counting. In retrospect the double and triple work and the thought that went into saving $9 was not worth it.

RITE

The original o-ring looks like its made of stiff plastic, were you able to fit the dealer one onto the sensor by just stretching it and putting it on? Or is there a special way to put it on?

98maxBK

No tools, just pull it on/ roll it up. Its not plastic, maybe yours seems that way because its old and oil soaked.

RITE

Alright, thank you very much for you input! I found its sold for $10 at my local dealer. I put a $1 nitrite o-ring on it for now, but if it starts leaking I'll just get the dealer one.

The Wizard

iTrader: (43)

My thoughts exactly. It's seems as if it's hard plastic because it's old and hardened. A new one will be soft and pliable. Don't waste your time with anything but OEM. Do it once, do it right.

CMax03

iTrader: (3)

It's rubber when new! It's look and feels like plastic when it's old and done!