Oil pump and timing chain bearing bolt
Posted: Sun Jul 25, 2010 3:25 pm
At the moment, I'm reinstalling my E12's oil pump. The Haynes manual as well as the parts catalog indicate that it may be necessary to use shims/spacer plates (see 1, #7 and #15) for the oil pump. Oddly enough, when I'd removed the oil pump almost two years ago, I found that only the largest shim (#7) was present.
Can this indeed be the case that there is only one shim? I know it only concerns 0,1 mm difference, but can imagine it would not be beneficial to the oil pump chain alignment. How crucial is this second shim (#15) to the normal operation of the oil pump? Also, is it a necessity to use the shims at all? Further, what would be acceptable in terms of slack/play for the oil pump chain?
Than another matter. I'm trying to remove the bearing bolt (2, #13) of the timing chain tensioner guide. Unfortunately, it's not the bolt type (as the two of the other guide), but more or less a 'dowel / pin' type which is hammered into the block. My question is: how can I extract it? I've already try to heat it up and use a vice grips. Finally, once this bolt is removed, is it possible to just hammer in the new bearing bolt (or do I have to heat up the block in advance)?
Hope you guys can help me out with these issues. Thanks in advance for your time.
References:
1: http://bmwfans.info/parts/catalog/E12/S ... ith_drive/
2: http://bmwfans.info/parts/catalog/E12/S ... ing_chain/
Can this indeed be the case that there is only one shim? I know it only concerns 0,1 mm difference, but can imagine it would not be beneficial to the oil pump chain alignment. How crucial is this second shim (#15) to the normal operation of the oil pump? Also, is it a necessity to use the shims at all? Further, what would be acceptable in terms of slack/play for the oil pump chain?
Than another matter. I'm trying to remove the bearing bolt (2, #13) of the timing chain tensioner guide. Unfortunately, it's not the bolt type (as the two of the other guide), but more or less a 'dowel / pin' type which is hammered into the block. My question is: how can I extract it? I've already try to heat it up and use a vice grips. Finally, once this bolt is removed, is it possible to just hammer in the new bearing bolt (or do I have to heat up the block in advance)?
Hope you guys can help me out with these issues. Thanks in advance for your time.
References:
1: http://bmwfans.info/parts/catalog/E12/S ... ith_drive/
2: http://bmwfans.info/parts/catalog/E12/S ... ing_chain/
