Posted this on r3v, but wanted to get more eyes on it:
I’m installing the IJ crank scraper and I’m not really clear on one of the instructions regarding the rear cover.
I’ve got a 12/86 build 325i. Apparently not all the E30/M20s have this, but the rear part of the oil pan had a little cover that bolts into the bottom part of the transmission. There’s a little rubber seal where this cover presses against the oil pan.
The instructions say that if you have this, you “trim the seal 2.5mm” to prevent applying too much pressure to the cover or the block when you bolt it back down.
I’m not clear on where/how to trim this piece. Trimming the length seems pointless… and the whole thing appears to only be a few mm deep, so 2.5mm seems like a lot to scrape off with a razor (plus, I’m not sure how you even do this evenly).
I feel like I’m missing something easy here…