classic car forum header
Classic cars forum & vehicle restoration.
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
How To Register     Posting Photographs     Privacy Policy     F/book facebook.com/oldclassiccar

Motor/Engine mounts for a prewar Armstrong Siddeley - DIY?
Post new topic   Reply to topic    Classic cars forum & vehicle restoration. Forum Index -> Mechanical Restoration
Author Message
greenbeam



Joined: 10 Jun 2015
Posts: 77
Location: Adelaide, Australia

PostPosted: Thu Dec 24, 2015 5:52 am    Post subject: Motor/Engine mounts for a prewar Armstrong Siddeley - DIY? Reply with quote

Hi all,
What do people do for renewing old/unusual engine mounts? Are there suppliers that will rebuild them, or does the availability of liquid urethane compounds of varying flexibility now make this a DIY proposition?

I imagine the mounts would originally have been quite soft/flexible to damp the long-stroke engine, and the softest urethane I have found so far has a hardness rating of '60A' (Devcon Flexane 60L) which is claimed to be similar to stock modern engine mounts. I am not sure if this is soft enough though.

In case it matters, this is for a 1935 Armstrong Siddeley and I'm in Australia.

Cheers,
Paul.
_________________
1963 Sunbeam Alpine Series 3
1935 Armstrong Siddeley 17HP Sports Saloon
Back to top
View user's profile Send private message
peter scott



Joined: 18 Dec 2007
Posts: 6177
Location: Edinburgh

PostPosted: Thu Dec 24, 2015 12:24 pm    Post subject: Reply with quote

Hi Paul,

I don't have an answer for you but thought I'd express empathy. I replaced the gearbox mount on my old car and the replacement was far too hard and introduced vibration that had not be present before. The mount in question is just a simple sandwich held horizontally and one of the plates had detatched from the rubber. In the end I just re-installed the old mount and ignored the fact that it had no lateral support.

Peter
_________________
http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 litre saloon
Back to top
View user's profile Send private message Visit poster's website
D4B



Joined: 28 Dec 2010
Posts: 2091
Location: Hampshire UK

PostPosted: Thu Dec 24, 2015 12:38 pm    Post subject: Reply with quote

Hi Paul, I too wish to express empathy! But sadly no solution really...

My 1961 Peugeot van badly needed new mounts, as when pulling away the
rubbers were parting company with the metal, causing the fan to scrape the radiator!

I found a new pair in France, but after waiting almost a month for them to arrive, found they were too tall and caused the fan to scrape the radiator
all the time!!



So in the end, and in desperation, I modified a pair of Mini engine mounts by
welding half of my Peugeot mounts to them:







Good luck with it Cool
Back to top
View user's profile Send private message
PAUL BEAUMONT



Joined: 27 Nov 2007
Posts: 1278
Location: Barnsley S. Yorks

PostPosted: Wed Dec 30, 2015 1:34 am    Post subject: Reply with quote

A picture of the offending part would be useful. Someone may recognise an adaptable replacement. I get engine mounts made in the UK for the
Jowett Car Club. Tooling is the chief draw back. Small volumes of parts are not awfully expensive.
Back to top
View user's profile Send private message
greenbeam



Joined: 10 Jun 2015
Posts: 77
Location: Adelaide, Australia

PostPosted: Wed Dec 30, 2015 3:03 am    Post subject: Reply with quote

Here are some photos of 'the offending part' as Paul B called it Smile.

Quite a complex piece. External casting, a sleeve through the rubber, with top and bottom washers onto the rubber, and then a threaded ring tightened down onto the perimeter of the rubber. There are four mounts like this in total.

Hopefully that helps with ideas for refurbishment, or an alternate source.

Regards,
Paul.

[img]

[/img]

[/img]
_________________
1963 Sunbeam Alpine Series 3
1935 Armstrong Siddeley 17HP Sports Saloon
Back to top
View user's profile Send private message
Da Tow'd



Joined: 16 Jun 2010
Posts: 343
Location: Bella Coma British Columbia Canada

PostPosted: Wed Dec 30, 2015 4:08 am    Post subject: Reply with quote

we made some small diesel engine mounts for a marine gen set using 3M windshield Polyurethane
correct size bolts with large washers in a paper drinking cup.
bolts facing out on both ends of the paper cup duct tape for the open end fill with the "goop" and let it cure
you might be able to reuse the "bolt" parts from the old mounts
they are still good after 3 years

just an idea
lots of YouTube's for inspiration
good luck
Hank
Back to top
View user's profile Send private message
greenbeam



Joined: 10 Jun 2015
Posts: 77
Location: Adelaide, Australia

PostPosted: Wed Dec 30, 2015 12:50 pm    Post subject: Reply with quote

Thanks for that Hank, good to know someone has tried the DIY path and been successful. I've seen the 'paper cup' trick on You Tube, but with the Devcon Flexane product. My concern there is how stiff the mount would be compared with the original. The motor in this car is very heavy - long stroke 6-cylinder, so not sure windscreen goo would be up to the task.

Given the lack of replies re professional rebuilders of the mounts, it looks like I'll have to try DIY. I'll post photos.

Regards,
Paul.
_________________
1963 Sunbeam Alpine Series 3
1935 Armstrong Siddeley 17HP Sports Saloon
Back to top
View user's profile Send private message
ukdave2002



Joined: 23 Nov 2007
Posts: 3491
Location: South Cheshire

PostPosted: Wed Dec 30, 2015 2:26 pm    Post subject: Reply with quote

Possibly you could adapt somthing that this firm supplies:

http://www.fibet.co.uk/products/anti-vibration-mounts.php

Dave
Back to top
View user's profile Send private message Visit poster's website
PAUL BEAUMONT



Joined: 27 Nov 2007
Posts: 1278
Location: Barnsley S. Yorks

PostPosted: Thu Dec 31, 2015 1:25 am    Post subject: Reply with quote

Looks like a fairly standard Silentbloc type bush with a thick boss up the middle. I am guessing that the bush itself comes out of the casting - maybe with some brute force! Quite a few folks here make such bushes but as you are in Aus have you talked to Motherson Elastomer Pty Ltd 48-86, Powell Street Unit 4, 18-22, Bendigo, Victoria, 3550, Australia PH: +61 3 5440 2069
Paul
Back to top
View user's profile Send private message
greenbeam



Joined: 10 Jun 2015
Posts: 77
Location: Adelaide, Australia

PostPosted: Thu Dec 31, 2015 3:09 am    Post subject: Reply with quote

Thanks Dave, Paul B for the pointers. Often it is the right terminology that helps suppliers understand what is needed, so the reference to 'Silent Block' is much appreciated Paul.

I've tried a few suppliers here, but given the Christmas/New Year period and our main summer holiday, many suppliers are closed for a couple of weeks. I'll follow up with your tips though gents.

Cheers,
Paul H.
_________________
1963 Sunbeam Alpine Series 3
1935 Armstrong Siddeley 17HP Sports Saloon
Back to top
View user's profile Send private message
Peter_L



Joined: 10 Apr 2008
Posts: 2323
Location: New Brunswick. Canada.

PostPosted: Thu Dec 31, 2015 4:54 am    Post subject: Reply with quote

Another term is anti-vibration mounts.

Here is a UK company whose website mentions that they are willing to help.

What that "help" actually is, may be answered if you contact them.

http://www.antivibrationmethods.com/category/military-av-mounts

I would be very surprised if there are not a number of companies making the same type of mountings. I would guess they will ask for the weight of whatever is being supported.
Back to top
View user's profile Send private message Send e-mail Visit poster's website
1935Hillman



Joined: 06 Apr 2010
Posts: 257
Location: Hampshire

PostPosted: Sun Jan 17, 2016 9:44 pm    Post subject: Reply with quote

I've had a small number of specially made rubber blocks made by this excellent and very helpful company
http://www.rhnuttall.co.uk/
They are quite a big firm but not too big to make the engine mounts for my 1933 Aero Minx which were very successful. I'm not sure that they will cast steel tubes into rubber but you may be able to make up the units by pressing the metal parts into the rubber like I did.

Back to top
View user's profile Send private message
1935Hillman



Joined: 06 Apr 2010
Posts: 257
Location: Hampshire

PostPosted: Sun Jan 17, 2016 9:47 pm    Post subject: Reply with quote

I forgot to say that I have a Talbot straight six engine with very similar mounts to yours that I am saving for a special at some future date. I have no idea how I am going to deal with them so will be very interested to see how you get on for when it is my turn
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Classic cars forum & vehicle restoration. Forum Index -> Mechanical Restoration All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Forum T&C


php BB powered © php BB Grp.