Engine vibration

[jfcroni]

Greetings All - My 1966 Aline is running OK, but seems to have a lot of vibration. The motor mounts are new VB. Any obvious wisdom on this out there?

 

[phyrman]

Tires??
Drive shaft?
Wheel bearing (front)???

 

[JJames]

Last year when I was swapping in an overdrive gearbox I thought I'd change the motor mounts since the engine was out of the car. It vibrated like crazy with the new mounts from SS, so I put the old ones back in and it was fine. Apparently the rubber in some of these new motor mounts is really hard. Somewhere in this forum somebody wrote about getting replacements from the Netherlands that were softer.

 

[jfcroni]

Last year when I was swapping in an overdrive gearbox I thought I'd change the motor mounts since the engine was out of the car. It vibrated like crazy with the new mounts from SS, so I put the old ones back in and it was fine. Apparently the rubber in some of these new motor mounts is really hard. Somewhere in this forum somebody wrote about getting replacements from the Netherlands that were softer.

That's what I'm thinking... too hard. If anyone has more info please let me know. It vibrates at idle... so I'm not looking at drive train. Thanks

 

[hartmandm]

I had the same issue with mounts from Classic Sunbeam. Rick at SS said his mounts are too hard as well. Get the motor mounts from Rootes Parts Service in the Netherlands.

Mike

 

[Ken Ellis]

A few well-placed 1/4" holes thru the rubber (longitudinally) might loosen it up. It would pay to have the replacements in-hand, though, in case of over-perforation... Attempt at your own risk, of course, although I wouldn't hesitate to give it a try on mine if it had that problem.

 

[Barry]

I think JJames hit the nail on the head.

The "rubber motor mounts" produced in the mid-1960's were probably a blend of natural rubber (poly-cis-isoprene), synthetic natural rubber (polyisoprene) and neoprene (polychloroprene). Modern rubber compounds for everything except tires are predominantly EPDM (ethylene propylene diene monomer) which is stronger, more heat resistant, more chemical resistant, much less expensive, etc. One of the "et cetera's" is greater modulus / less flexibility.

Motor mounts could certainly be re-pop'ed using the orginal compounds, but $$$.

Just my opinion, YMMV.

 

[hartmandm]

Motor mounts from Classic Sunbeam and Sunbeam Specialties have rubber that is too hard. Get the motor mounts from Rootes Parts Service in the Netherlands. Those will work fine.

Mike

 

[jfcroni]

Thanks all... I ordered the mounts from Rootes Parts in the Netherlands. I'll report back when installed.

 

[65beam]

engine

It may be months before you get them if you even get them!

 

[moonstone SIV]

Many of Rootes Post Vintage repro items are of questionable quality, the only parts I have used with success are the Metalastik style A arm bushes. They are difficult to communicate with and completely unreasonable when it comes time to return the faulty items. Buyer beware...!

 

[George Coleman]

The new stuff from VB SS are to hard, the only ones that seem to work like the org. is the ones from Roots spares in Holland.

 

[jfcroni]

I received my motor mounts from Rootes today! It took about 3 weeks. They are nice and soft compared to the SS or VB mounts. Will get them on soon and let you know if there's a noticeable difference.