Piston - Valve Clearance
Moderator: martauto
-
knapmann
- E30 Zone Newbie
- Posts: 79
- Joined: Wed Sep 10, 2014 11:00 pm
Hi, I just tested my clearance and there is plenty on the Exhaust valve. The intake side has good clearance on the valve face however there is little clearance on the valve edge (about 0.5mm?) Below is the picture. Will these pistons need machining on this face or is that face not a concern?
-
DanThe
- E30 Zone Team Member
- Posts: 28649
- Joined: Sat Sep 10, 2005 11:00 pm
- Location: Staffs
From what I can see in the picture I wouldnt be happy with that, what have you changed?
-
knapmann
- E30 Zone Newbie
- Posts: 79
- Joined: Wed Sep 10, 2014 11:00 pm
I have a 285 Catcams Cam, and stock pistons and valves etc.DanThe wrote:From what I can see in the picture I wouldnt be happy with that, what have you changed?
-
reggid
- E30 Zone Squatter
- Posts: 1984
- Joined: Mon Jul 11, 2005 11:00 pm
- Location: Oz
have you dialled in the cam properly with adjustable pulley? you could get a die grinder to give some more radial relief by laying back the pockets, just make sure the shavings don't go anywhere you don't want them to
E30 325is with M20B31
-
DanThe
- E30 Zone Team Member
- Posts: 28649
- Joined: Sat Sep 10, 2005 11:00 pm
- Location: Staffs
It might just be the picture but id expect to be seeing 1mm clearance at least there
Like this -
Like this -