- Joined
- Oct 7, 2018
- Messages
- 22
Hi all, I'm in the process of reassembling the primary chain cases on my Mk3 ES after removing them to drop the engine far enough to pull out the rear isolastic. When I tighten up the outrigger it pushes the starter drive gear hard up against the chain tensioner plate cover to the extent that it won't turn. Before tightening there is a gap of around 16 thou between the back of drive gear (this is the one that houses the anti-backfire ball bearings) and the cover plate but that closes to zero when the outrigger is tightened up. I can't think of anything that I've done that may have caused this to happen as the starter turner OK before I started the job.
I pretensioned the AB unit to 50 ftlb and replaced the drive gear 06-4707 as the ball bearings had been cutting a bit of a track in there, but that's about the extent of it. I could put washers between the outrigger and the inner primary to stop it pushing the ES drive assembly on to the chain tensioner plate but I'm wary of messing with the resulting change in the stator position, being aware of the sensitivities of rotor/stator clearances. Alternatively I could cut a deeper seat where the starter drive shaft houses in the outrigger but I don't have the machine gear and it seems a bit drastic for a problem that sorta turned up out of the blue.
Any clues?
I pretensioned the AB unit to 50 ftlb and replaced the drive gear 06-4707 as the ball bearings had been cutting a bit of a track in there, but that's about the extent of it. I could put washers between the outrigger and the inner primary to stop it pushing the ES drive assembly on to the chain tensioner plate but I'm wary of messing with the resulting change in the stator position, being aware of the sensitivities of rotor/stator clearances. Alternatively I could cut a deeper seat where the starter drive shaft houses in the outrigger but I don't have the machine gear and it seems a bit drastic for a problem that sorta turned up out of the blue.
Any clues?