Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

Engine mount shortcuts... mulling over crazy ideas

Thread Tools
 
Search this Thread
 
Old 07-15-2004, 10:45 PM
  #1  
Thaddeus
Deer Slayer
Lifetime Rennlist
Member
Thread Starter
 
Thaddeus's Avatar
 
Join Date: May 2001
Posts: 25,565
Likes: 0
Received 3 Likes on 3 Posts
Default Engine mount shortcuts... mulling over crazy ideas

I need motor mounts.

I am already working through a substantial list of issues. I already have my hands full. I will be replacing the mounts, but not now.

But I'd sure like to ameliorate the issue until I get around to doing it properly.

I've been wondering:

Is there any way to trick the collapsed mounts into reinflating?

Is there anything I could insert in there that would lift the engine and provide some 'give'?

Is there a means of augmenting the existing mounts?

Is there another short term fix?

Just wondering aloud, nobody jump down my throat please...
Old 07-15-2004, 10:52 PM
  #2  
Jim bailey - 928 International
Addict
Rennlist Member

Rennlist
Site Sponsor

 
Jim bailey - 928 International's Avatar
 
Join Date: Jul 2001
Location: Anaheim California
Posts: 11,542
Likes: 0
Received 2 Likes on 2 Posts
Default

Some people stuff some rubber under the oil pan above the crossmember to push up the engine . That would seem to me to put a lot of stress on the oil pan gasket BUT if you do mounts also do the pan gasket .........so it may not matter . The gasket should be done anyway .
Old 07-15-2004, 11:05 PM
  #3  
Garth S
Rennlist Member
 
Garth S's Avatar
 
Join Date: Oct 2003
Location: Nova Scotia
Posts: 7,210
Likes: 0
Received 16 Likes on 13 Posts
Default

http://www.jageng.com/speedmount.htm

Jim has the answer, Paul (Jager) has the product - follow the link; looks like a 15 min. job of stuffing hi-tech rubber.
Old 07-15-2004, 11:46 PM
  #4  
tresamore
Photoshop Bully
Rennlist Member
 
tresamore's Avatar
 
Join Date: Feb 2003
Location: Southern NH
Posts: 7,803
Likes: 0
Received 2 Likes on 2 Posts
Default

I was always curious as to if you could cut away a small circle of the rubber coating around the cavity where the fluid was, drill through the metal into the cavity and attach a self tapping zerk fitting then pump the cavity full of grease thus possibly "re-inflating" the mount. The grease would be thicker and not leak out, but if it worked, may be too stiff for the mount. Maybe you could pump some silicone oil in instead. Just a thought, I was going to play around w/ an old mount one day but never did. This is just some head in the clouds curiosity stuff here, so put your flamethrowers away!
Old 07-15-2004, 11:48 PM
  #5  
touque
Addict
Rennlist Member

 
touque's Avatar
 
Join Date: Feb 2004
Location: PacNW
Posts: 723
Received 3 Likes on 2 Posts
Default

how 'bout some hot glue injected in there? It would cool and solidify and may be perfect? Wonder if it would get so hot down there as to re-liquify the hot glue stick?
Old 07-15-2004, 11:59 PM
  #6  
Thaddeus
Deer Slayer
Lifetime Rennlist
Member
Thread Starter
 
Thaddeus's Avatar
 
Join Date: May 2001
Posts: 25,565
Likes: 0
Received 3 Likes on 3 Posts
Default

The Jager engineering thing is interesting, but I'd be worried about the gasket or even the pan itself. Couldn't the pan crack under the load? Of course, the site seems to imply it's resting metal-pan to metal-crossmember after the mounts collapse anyway. Maybe a rubber mount there is the ticket as a temporary fix if the stress/load is already there...

Reinflating the mounts seems interesting, but you'd need the right stuff... something that would start out pasty or liquid, then form a heavy, bouncy, resilient mass. Spray foam would work, but would break down almost immediately in the heat. Shoe Goo might make the perfect rubber-like compound, but it wouldn't ever cure inside the rubber mount body, and it may also be prey to heat.

Maybe I could inject some of my mother's Matzoh Ball mix in there.......nah, too hard........ anyways, if I mixed it it the Matzoh mounts would turn out fluffy and delicious. Unlike Mom's, which would be like mounting the engine on little blocks of granite.
Old 07-16-2004, 01:08 AM
  #7  
GoRideSno
Drifting
 
GoRideSno's Avatar
 
Join Date: Feb 2002
Location: Redondo Beach, CA>>>>Atlanta,GA
Posts: 2,015
Likes: 0
Received 0 Likes on 0 Posts
Default

The ideas here are interesting. I had once thought of re-filling the MMs too. Since re-heating and melting is a issue with use you may cosider some type of 2 part epoxy/rubber cement that cures anarobically.
If you are going to replace your motormounts then there is not much risk in trying it.
There are 2 chambers in the mounts so you would need to be sure to fill them both.
There was once a drawing posted of the chambers in the mount.


Andy K
Old 07-16-2004, 12:55 PM
  #8  
hans14914
Rennlist Member
 
hans14914's Avatar
 
Join Date: Aug 2003
Location: Indianapolis
Posts: 2,606
Likes: 0
Received 263 Likes on 119 Posts
Default

What about candle or bees wax. That would go in as a liquid, then harden. I doubt it would leak out, and it would warm up and provide a smooth ride i would guess
Old 07-16-2004, 01:26 PM
  #9  
Imo000
Captain Obvious
Super User
 
Imo000's Avatar
 
Join Date: Aug 2003
Location: Cambridge, Ontario, Canada
Posts: 22,846
Received 337 Likes on 244 Posts
Default

You can do what I did:

I made my own "Jageng lever III" mouts myself. Total cost was less than $5 CDN and took all but 5-10 min to install. Essentially the product is nothing more than a thick piece of rubber. I went to the local rubber/hydraulic hose store and asked to buy a thick piece of rubber strip. The size was aprox. 1" x 1" and was sold by the foot. I bought 3 feet and only used 2 of that. I've cut the rubber into 1' sections and inserted them betwen the cross memeber and the oil pan. Only had to use 2 strip and a little bit of lubricant.

The improvement was dramatic and it's been in there for almost 2 years. When time comes to replace the oil pan gasked i'll replace the engine mounts too. Till then it's stays the way it is.

Look at it this way..... U can spend $5 and do it my way, or spend $29+sh, a week of waiting and get the same thing from Jegeng.

I hope this helps.
Old 07-16-2004, 01:27 PM
  #10  
MikeN
Three Wheelin'
 
MikeN's Avatar
 
Join Date: Jan 2003
Posts: 1,447
Likes: 0
Received 0 Likes on 0 Posts
Default

I've seen a couple of pairs of worn out / collapsed motor mounts.....and usually the rubber is so hard and brittle there would be little chance of re-inflating them......interesting idea, probably not feasible.
Old 07-16-2004, 02:43 PM
  #11  
tresamore
Photoshop Bully
Rennlist Member
 
tresamore's Avatar
 
Join Date: Feb 2003
Location: Southern NH
Posts: 7,803
Likes: 0
Received 2 Likes on 2 Posts
Default

is it the rubber that does the cushioning or is there a piston like cavity inside that the fluid leaks out of that does it?
Old 07-16-2004, 03:33 PM
  #12  
MikeN
Three Wheelin'
 
MikeN's Avatar
 
Join Date: Jan 2003
Posts: 1,447
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally posted by tresamore
is it the rubber that does the cushioning or is there a piston like cavity inside that the fluid leaks out of that does it?
I believe it is some of both. The rubber is extremely tough and thick but somewhat flexible. I'm sure the fluid also plays a part with keeping it smooth......or softening the mount.
Old 07-16-2004, 04:27 PM
  #13  
Weissach
Burning Brakes
 
Weissach's Avatar
 
Join Date: Jun 2001
Location: Miami, FL
Posts: 1,152
Likes: 0
Received 2 Likes on 2 Posts
Default

I had the Jager mounts before I did the motor mounts. They work really well.
Old 07-16-2004, 07:11 PM
  #14  
DG84S
Addict
Rennlist Member

 
DG84S's Avatar
 
Join Date: Jun 2002
Location: Fort Worth, TX
Posts: 511
Likes: 0
Received 0 Likes on 0 Posts
Default

I also used the Jager speedmount (for more than a year). It worked, caused no problems, and was easy to install.
Old 07-16-2004, 08:22 PM
  #15  
goliver
Three Wheelin'
 
goliver's Avatar
 
Join Date: Oct 2003
Location: Sacramento, CA
Posts: 1,315
Received 0 Likes on 0 Posts
Default

There must be some type of chemical that would work. My assistant's son works for Caltrans. His job is to raise the edges of bridges with some expanding foam sealant stuff that NASA invented to make the transitions smoother. If that can be done this should be simple.

Regards,


Quick Reply: Engine mount shortcuts... mulling over crazy ideas



All times are GMT -3. The time now is 02:55 AM.