I'm floating in the pond again, does anyone know if the left and right engine mounts are the same, i have the carb side (left) in my hand but need to know if they are different in size and angle. Any pic of dizzy side would be nice. Trying to make a more robust semi solid mount that i don't tear apart, so far two failed mounts on the left side, they have just delaminated. Lucky me I had the stop plates fitted that most people throw away. http://www.mgexp.com/phorum/read.php?48,1961314,1961314#msg-1961314 Fri, 24 May 2013 12:46:50 -0500 Phorum 5.2.15a http://www.mgexp.com/phorum/read.php?48,1961314,1978818#msg-1978818 http://www.mgexp.com/phorum/read.php?48,1961314,1978818#msg-1978818 chormy MGC Forum Tue, 07 Feb 2012 15:47:29 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1969266#msg-1969266 http://www.mgexp.com/phorum/read.php?48,1961314,1969266#msg-1969266 chormy MGC Forum Sat, 28 Jan 2012 15:44:02 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1969220#msg-1969220 http://www.mgexp.com/phorum/read.php?48,1961314,1969220#msg-1969220 I may have to alter the bush material buts its a start. will try one mount first before making the other.
Time wise and material they will work out expensive as one off's if it works I may have some plates laser/water cut in 4mm will save time.]]> chormy MGC Forum Sat, 28 Jan 2012 14:52:09 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1964722#msg-1964722 http://www.mgexp.com/phorum/read.php?48,1961314,1964722#msg-1964722
Thanks Mark the drg was a great help, I think the engine angle is 2-3 ']]> chormy MGC Forum Tue, 24 Jan 2012 00:10:28 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1964595#msg-1964595 http://www.mgexp.com/phorum/read.php?48,1961314,1964595#msg-1964595
The bolt holes in the mount brackets are offset because of the angle of the crankshaft axis in the chassis. Looks like the angle at the mounts is about 2 degrees.

Don't know what the actual angle of the crank is to the horizontal, but that is the angle of the bolt pattern in the brackets.

C Ya,
Mark]]> Big6Mark MGC Forum Mon, 23 Jan 2012 21:09:33 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962512#msg-1962512 http://www.mgexp.com/phorum/read.php?48,1961314,1962512#msg-1962512
That looks like a good design. Restricted movement from torque, maybe not so much in the for-and-aft direction, but could be just what you need.

Might try something like that for myself!

C Ya,
Mark]]> Big6Mark MGC Forum Sat, 21 Jan 2012 18:04:34 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962399#msg-1962399 http://www.mgexp.com/phorum/read.php?48,1961314,1962399#msg-1962399
Have a few spares in my parts box at every track day lol!

better be off to my pit, Nite all]]> chormy MGC Forum Sat, 21 Jan 2012 16:05:33 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962387#msg-1962387 http://www.mgexp.com/phorum/read.php?48,1961314,1962387#msg-1962387
Only for your information:

http://www.ebay.co.uk/itm/MGC-ENGINE-MOUNTING-BRACKETS-1-PAIR-/380383167552?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item58909a8440

MikeDooley]]> ga duke MGC Forum Sat, 21 Jan 2012 15:52:21 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962381#msg-1962381 http://www.mgexp.com/phorum/read.php?48,1961314,1962381#msg-1962381
I did not notice I have that side sitting on my desk so no worries. Hole centres are 55mm for that side on my block.


Mark
yes the rubber is being torn from the plate, the original restrictors seem to work so far.

What I am doing is to mount a bush in a welded tube to one side and on the other side use two plates welded to base to shroud it and use a 15mm bolt as a pivot point. this will allow only a small compression of the bush lips in fore and aft movment.
a rough drg !!]]> chormy MGC Forum Sat, 21 Jan 2012 15:45:44 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962350#msg-1962350 http://www.mgexp.com/phorum/read.php?48,1961314,1962350#msg-1962350
Just looked at the parts again and discovered an error in my sketch.
I assumed that the holes to mount to the block were in-line, but discovered that there is a 2.5mm offset on one side, top to bottom.
Will modify sketch and repost.

@Mark: The heights of the support surfaces are substantially different from left to right.

Perhaps a better solution might be a perimeter stop...like a box w/ a mounting flange and matching hole pattern with a cap that would restrain the entire top of the rubber mount with a clearance slot for the engine bracket. Don't know if this is possible with the hole locations though.

MikeDooley]]> ga duke MGC Forum Sat, 21 Jan 2012 15:20:44 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962299#msg-1962299 http://www.mgexp.com/phorum/read.php?48,1961314,1962299#msg-1962299
Those rubber mounts are the same left-to-right, they are only indexed as to top or bottom. The base plate dimensions are 4 3/4" wide (120 mm) by 4 9/16" high (115 mm). The bolt pattern there is 4" wide (102 mm) by 3 9/16" (90.5 mm) verticle.

The brackets are handed, but the only real difference is that the right one has a clearance cut in it to accomidate the blanking plate over the mechanical fuel pump hole.

I don't think the "restrictors" really do much good at all. I have been trying to collect a pair for the roadster restoration project, but so far have only gotten two right ones. Really only want them for show. Anyone have a decent left one? Anybody who knows me knows I'm not afraid to straighten mangled metal...

My thought is that you need to either need to make stronger mounts or restrict the engine movement in Yippee. This could mean making solid engine mounts (which I have done before) or making some other restrictors that will limit the stress on the rubber.

Many years ago I saw a ~1974 Pontiac Firebird drag racer with a strong engine (maybe 500 hp?) that had a chain welded to the left inner wing. The other end was bolted to the front of the left cylinder head. Simple engine restrictor and the torque of the engine actually pulled the engine down, compressing the mounts and prevented them from tearing. Perhaps something similar (but more asthetic) is what you need. (P.M. sent.)

C Ya,
Mark]]> Big6Mark MGC Forum Sat, 21 Jan 2012 14:43:35 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962271#msg-1962271 http://www.mgexp.com/phorum/read.php?48,1961314,1962271#msg-1962271 I drew this up...should have advised that dims will be close...my measuring is only "eyeball accurate".

M]]> ga duke MGC Forum Sat, 21 Jan 2012 14:22:01 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962266#msg-1962266 http://www.mgexp.com/phorum/read.php?48,1961314,1962266#msg-1962266
Shaun]]> chormy MGC Forum Sat, 21 Jan 2012 14:18:56 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1962260#msg-1962260 http://www.mgexp.com/phorum/read.php?48,1961314,1962260#msg-1962260
Please see attached info...might be of some help.

Mike Dooley]]> ga duke MGC Forum Sat, 21 Jan 2012 14:13:08 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1961398#msg-1961398 http://www.mgexp.com/phorum/read.php?48,1961314,1961398#msg-1961398
Thanks I have a block with me, in ur photo I need the distance from the top/back of that block to the top/back of the U shaped mount (that goes on the engine. Both for the top and bottom should be around 74mm at narrow end and about 105/6 mm at wide end.

If that makes any sense, so frustrating when ur 4000 miles away from the part you knew you should have put in ur luggage as well.]]> chormy MGC Forum Fri, 20 Jan 2012 15:50:53 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1961379#msg-1961379 http://www.mgexp.com/phorum/read.php?48,1961314,1961379#msg-1961379 The rubber part is 8 X 11 cm, and is 3 cm thick.
All measurements a close approximations, as I am using a plastic ruler, not the best tool for the job.
Craig]]> C8407 MGC Forum Fri, 20 Jan 2012 15:27:21 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1961355#msg-1961355 http://www.mgexp.com/phorum/read.php?48,1961314,1961355#msg-1961355
Ok so they are different, oh! well will have to make the second when home as I need the measurements and angle. If anyone has one complete right side one on the bench the measurement of width both top and bottom (mm if poss) will give enough to work it out.
Going to use a polly bush and tube to give some vibration damping but restrict fore and aft movement to a couple of mm.]]> chormy MGC Forum Fri, 20 Jan 2012 14:51:11 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1961335#msg-1961335 http://www.mgexp.com/phorum/read.php?48,1961314,1961335#msg-1961335
Since you mention "laminated", I'll assume that you are referring to the metal/rubber vulcanized mounts that go between the frame and the brackets bolted to the engine...the vulcanized mounts are the same L.H. & R.H., but the brackets that mount to the engine are "handed" and are marked as such. Don't have a photo right now, but if no one provides one later, I'll follow up.
Correct me if my assumptions regarding your comments are wrong.

Mike Dooley]]> ga duke MGC Forum Fri, 20 Jan 2012 14:30:20 -0600 http://www.mgexp.com/phorum/read.php?48,1961314,1961314#msg-1961314 http://www.mgexp.com/phorum/read.php?48,1961314,1961314#msg-1961314 Any pic of dizzy side would be nice.

Trying to make a more robust semi solid mount that i don't tear apart, so far two failed mounts on the left side, they have just delaminated. Lucky me I had the stop plates fitted that most people throw away.]]> chormy MGC Forum Fri, 20 Jan 2012 14:10:42 -0600