norfolkluego
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| posted on 7/11/09 at 11:44 PM |
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Oooooh dear, that's not right
The ongoing Zetec installation continues but in a now freezing cold garage.
After b*ggering about with the engine mounts for what seems like ages (next time I'd bin the old ones and make fresh from scrathch rather than
trying to adapt) we finally got the engine in and sitting nicely. Rubs chin and thinks I wonder if it's in the right position height wise,
brainwave (possibly), if the prop is horizontal in the transmission tunnel the engine must be at the right height. So off with the tunnel covers and
this is what we found. The prop (or the UJ at the front of the prop I'm assuming) had been fouling one of the upright chassis members in the
tunnel and has worn a small 'groove' in it, highlighted in red on piccy (disclaimer, I didn't build the car or fit the original
crossfflow) we've now adjusted the engine position so that the prop in equidistant from each of the chassis members and is horizontal, should be
OK yes?
One other question the gearbox isn't mounted as far as I can see so the transmission is unsupported between the diff and engine mounts, is that
OK?
[Edited on 7/11/09 by norfolkluego]
[Edited on 7/11/09 by norfolkluego]
 
Rescued attachment Prop1.jpg
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AdamR
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| posted on 8/11/09 at 12:24 AM |
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Assuming the diff and gearbox flanges are both vertical, the prop should ideally be a few degrees off horizontal for the UJs to work properly. In most
cases the gearbox output is a few inches higher than the diff, so the prop slopes down towards the back of the car.
And you should definitely have a gearbox mount of some description!! 
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SteveWalker
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| posted on 8/11/09 at 12:32 AM |
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I'd be expecting a mount for the gearbox - a rubber bush under the box, with a crossmember to support it. Basically you should have a tripod
mount, consisting of the two engine mounts, plus the box mount. Without it, there's nothing to stop the gearbox moving up and down (and a bit
from side to side), as the prop itself obviously cannot provide any, being jointed.
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zilspeed
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| posted on 8/11/09 at 07:47 AM |
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The lack of a gearbox mount explains the front U/J having worn into the transmission tunnel.
Unless solidly mounted, an engine and gearbox will move around a fair old bit under the dynamic loads exerted in all three axes. All of these either
by their own self mass being acted upon by the dynamics of the car or self imposed by reacting to the rest of the driveline.
In my old Star Zetec, we thought we had this under control where there was very minimal clearance at the front of the engine. Ultmately, we had to
engineer a solution which still allowed for the movemement of the engine and box, but influenced the direction in which it moved to prevent the front
pulley fouling the front crossmember.
In our case, we actually fitted a high level engine mount which caused the engine to rotate up and away form the offending fouling point under
braking.
There are a lot of forces at work here, and you need to think of them all.
The engine in the current car is 100% solid mounted.
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:{THC}:YosamiteSam
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| posted on 8/11/09 at 02:23 PM |
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quote:
Originally posted by norfolkluego
One other question the gearbox isn't mounted as far as I can see so the transmission is unsupported between the diff and engine mounts, is that
OK?
shit yea!!!!!!!!! there needs to be a mounting on the rear end of the box to stop the whole lot from possibly falling out!!!!
i presume you have a type 9 box? if so there is a good mounting point under that for a rubber bush and plate.. it will stop any chassis fouling i
guess too. it must bang a bit on bumps does it? thro the floor every now and then?
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bigpig
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| posted on 8/11/09 at 02:36 PM |
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I think without the gear box mounted properly, you are a lucky bunny that all you have is a small groove and not more damage.
I would also check the engine mounts to be safe to ensure they havn't been damaged by the unsupported gear box. (Probably not, but you
don't want to find one suddenly breaks and the engine tries to fall out when out for a drive).
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norfolkluego
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| posted on 8/11/09 at 04:52 PM |
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Cheers guys, didn't think it was right, has anyone got a nice piccy of a type 9 engine mount, in situ in a 7 would be even better
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:{THC}:YosamiteSam
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| posted on 8/11/09 at 06:20 PM |
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quote:
Originally posted by norfolkluego
Cheers guys, didn't think it was right, has anyone got a nice piccy of a type 9 engine mount, in situ in a 7 would be even better
quick search found these
![]()
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norfolkluego
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| posted on 8/11/09 at 06:49 PM |
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Thanks Sam that's great
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stuart_g
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| posted on 8/11/09 at 06:59 PM |
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Use the Westfield Type 9 gearbox mount as this has stiffer rubber than a Sierra one.
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norfolkluego
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| posted on 8/11/09 at 10:27 PM |
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The Westfield one is just rubber, do I need the metal bracket as shown in Sam's post
 
Rescued attachment mount1.jpg
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norfolkluego
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| posted on 10/11/09 at 09:29 PM |
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Anybody?
Do I need both the metal bracket and the rubber mount together or just one or the other?
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