A while back I bout my 325 and after 1k the head went. When replacing the head and rebuilding it back up, I noticed that my pistons had a + on them. I haven't played about with BMW engines before but wondered if this signified a different piston type? The guy I bought a replacement head off of had different pistons in his, just flat topped. Mine had two small mounds on them, one large and one small on opposite sides. Sadly I can't find the pics I took from back then, but wondered if anybody could shed any light on it?
Cheers
Do I have special pistons?
Moderator: martauto
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sideshowbob
- E30 Zone Newbie
- Posts: 249
- Joined: Thu Jan 10, 2008 11:00 pm
Not sure if they are 'special' but the + sign could signify standard byt oversize pistons that are usually fitted after a rebore, ie + 10 thou etc.
it works fine, had 5k out of it, just was looking at chipping it soon, so wanted to make sure I had a standard engine. It runs really well, not had a problem since the rebuild. It has had an amazing 21 owners, so may have been upgraded at some point, im not sure