Board logo

Ohhhhh Blast it.
jollygreengiant - 21/8/11 at 01:46 PM

Or words to that effect.

On the way to the Stoneliegh show, I found that I had a throttle problem. When I got home I found that a small piece of plastic from my induction set up had broken of and was jamming the butterfly open, intermitently. So I repaired the induction tubing and thought, Sorted.

A couple of weeks ago I went out on a blat round my area before supposedly going on a Fish 'N' Chip run to sunny hunny. However on my run out I found that I was having dificulty selecting 1st and 3rd. So I puulled out of the run. Oh and on the way home from my blat, I lost my air filter (as I ran over it and mangled it).

Anyway, today, I FINALLY got the car up in the air to inspect what was going on, because, other than the gearstick having moved sideways and forward by about 5mm, there was no obvious sign of anything.
Turns out that the nearside engine mounting, onto the block, has cracked on the underside between the plate and the shaft down. The offside mounting plate to the rubber insulater has distorted.

So, I now have to remove both the engine mountings and remanufacture them, using heavier plate. I thought that 3mm would have been enough, but, obviously the power from my pinto is too much and maybe I shall have to go for 5mm or 6mm.

Then I will have to remake the air filter housing again and by a new filter.

Bugg£r.

Richard Quinn - 21/8/11 at 02:59 PM

It might be the weight rather than the power

MikeRJ - 21/8/11 at 03:13 PM

3mm is certainly too thin for the typical design of engine mount used in the locost because it concentrates a lot of stress in a small area, and obviously there are significant cyclic loads which all adds up to fatigue cracks.

A 5 or 6mm plate would be much better, as would modifying the design to minimise bending forces on the plate.

rusty nuts - 21/8/11 at 03:44 PM

quote:
Originally posted by Richard Quinn
It might be the weight rather than the power


Oh, you bitch! But I think you hit the nail on the head.

3mm does seem a bit on the thin side Clive but at least you have a pattern

stevegough - 21/8/11 at 03:48 PM

Yes, Clive and in the immortal words of Darth Vader......" DO NOT UNDERESTIMATE THE POWER OF THE ...ER ...PINTO "

ashg - 21/8/11 at 07:50 PM

3mm geez that is thin. i used 10mm plate for the engine mounts on the new engine

Volvorsport - 21/8/11 at 09:12 PM

well since your engine mounts dont follow the oe design , there will be a roll couple from the engine , thats adding to the original weight of the engine during cornering/braking /accelerating .

engine mounts (the flexible bit ) should be placed in the plane of the centre of mass . or just completely over engineer them.

wilkingj - 22/8/11 at 06:53 AM

I made engine mounts from 3mm... and then had to make some new ones later on as the engine sagged, due to the mounts bending.

Havent moves now in 4 years!

Irony - 22/8/11 at 07:22 AM

I bought new engine mounts from Luego. I beefed the 5mm steel plate up with some extra padding. There are some great ideas for engine mounts on this site however.