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Pics. The first is the back interface part that just sits in place. In this pic I have replaced the o-rings with originals. As you can see there is a slight gap when I push it forward. This is good. With the new o-rings I sourced there was no gap and the back got scored. Metal shavings made it into the oil system.
The second pic shows the gap between the body and face. This is a normal gap and this one is okay. With the replacement o-rings the gap was MUCH larger.
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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car
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