Engine mount box section query

[ashbudd7]

Morning everyone,

With regards to the box section for the engine mounts (I'm using the dohc) would I be ok using 45mm with a 2mm wall box or should I order up some 30mm? If I do need 30 which wall thickness should I get, 2 or 3?
It's just that a) I've found some 45mm and b)is the 30mm strong enough?

Thanks

Ashley

[twinturbo]

you would have to show us your planned design to get any idea.

TT

[brainbug007]

If you're making the custom engine mounts described in the book for non-pinto engines, personally i'd go for the bigger stuff as by the time you drill the hole for the bolt and then put the lock nut on, it doesn't leave that much space to get a spanner/socket in there to tighten it up. I'd also go for 3mm personally as I would think 2mm could end up bending under the weight & twist of the engine?

[ashbudd7]

Ah, well I'm at work at the mo so can't provide pictures but here goes:
I've made two plates to the same profile and hole pitches as the original mounts to bolt to the engine and two plates to bolt on to the land rover rubbers that are on the way. The rubbers will be mounted to 3mm plate welded to the bottom chassis rails as per book. Then I'll bridge the gap with the box section I've mentioned. At the moment I've worked out all the angles and lengths but this is based on 40mm box. The drivers side will leave the engine at a 48.07 degree angle and is 224.77 long along it's longest length.
Hopefully this makes sense and helps!
I'm open to any criticism/suggestions

Cheers

Ash

[alga]

I used 30x30x2 box section, I don't expect it to cause any problems.

http://locost.lt/pic/215
http://locost.lt/pic/216
http://locost.lt/pic/217

[ashbudd7]

Brilliant, thanks for the replies. I've ordered up some 40sq 3mm wall to be safe.

Cheers

Ash

[jps]

Just about to fabricate some mounts for my Pinto, i thought the book spec was 6mm plate across the chassis rails and at the ends of the box section, but have other people used 3mm with success?

[will_08]

Just about to fabricate some mounts for my Pinto, i thought the book spec was 6mm plate across the chassis rails and at the ends of the box section, but have other people used 3mm with success?

Pretty sure they are 3mm pal, the only thing thicker on the chassis is the diff brackets and they r 5mm

[jps]

Just dug out the book, its 5mm for the ends of alternative engine mounts and the plates to cross the chassis rails... I've been able to get some 6mm for free so will be using that if 3mm isn't tough enough... Just wanted to see if others have used 3mm and found it ok?

[will_08]

I'm confused now, why u got to use the alternative mounts when the book spec mounts are for a pinto?

Only asking cause im using a pinto, and ive already cut all the EM plates out of 3mm :confused:

[jps]

For reasons i can't understand it appears common that the book engine mount solution, using the cast Ford engine mounts if its a pinto, doesn't work. I'm not the first person to discover this, the steering column and the mount both want to be in the same place at the same time. Serieslandy has a thread that shows a solution, but basically its just the same as the 'alternative engines' bit in the book....

[John.W]

If you look at Janine's build pictures, he used the original pinto engine mounts but Made the steering shaft to go around the engine mount. A damn fine build it is too.

I've tried inserting the picture but it won't let me.

[John.W]

I hope it works this time

[will_08]

Ok i think im with it now!! :eek:

just as well you posted this jps!

to clarify, looking back at serieslandys build thread. Am i right in thinking its only the driver side mount that has to b re-made to look something like the "alternative mounts"

Also does this have further knock on effects for the rest of the build? modifying the steering etc?

Thank Will

[jps]

Ok i think im with it now!! :eek:

just as well you posted this jps!

to clarify, looking back at serieslandys build thread. Am i right in thinking its only the driver side mount that has to b re-made to look something like the "alternative mounts"

Also does this have further knock on effects for the rest of the build? modifying the steering etc?

Thank Will

Yes, its only the drivers side mount which causes a problem and an alternative to modifying the mount is to re route the steering column. I think it makes more sense to change the mount though as its more straight forward and doesn't add something else to potentially go wrong in the steering.

You could keep the book spec off side mount, and just redesign the drivers side one, but I'm going to make my own for both sides so i can use the same rubber mounts on both sides. Otherwise i think there may be an imbalance in the way the engine is 'sprung' (for want of a better word)...

[will_08]

Im with you now, thanks for the info.


Ill have to look at the alternative mounts in the book when i next get chance to get in the garage.

Cheers Will, oh and all the best for the new year :)