Schumacher engine mount vibration

Posted By: redex79

Schumacher engine mount vibration - 02/23/12 05:54 PM

I'm have some vibration problems with a 71 E body. A hemi was installed in place of the original 383 using Schumacher mounts. Still has the original K member using Schumacher mounts. Replaced the trans mount with the original material sytle, had the drive shaft checked and balanced. Tryed two complete sets of tires and wheels. Still having a vibration while driving at lower speeds untill around 70 mph. Vibration is not as bad but still noticable. I'm wondering if there might be a issue with the engine mounts. Has anyone had vibration problems like this ?

Posted By: Kern Dog

Re: Schumacher engine mount vibration - 02/23/12 06:08 PM

I used the poly mounts for the FrankenDuster project. The mill was a 9.2 to 1 360 with the '508 cam. It vibrated a little but I enjoyed it.
What are the chances that the motor has a balance issue? Lets HOPE not, huh?

Posted By: redex79

Re: Schumacher engine mount vibration - 02/23/12 07:02 PM

That is a thought or could be a internal transmission problem.

Posted By: dm69charger

Re: Schumacher engine mount vibration - 02/23/12 08:21 PM

Is the vibration more noticeable in the front or back? The reason that I ask is because you may have a bent axle. I had one of those before on a Cheby. Drove me nuts until I replaced it.

Posted By: redex79

Re: Schumacher engine mount vibration - 02/23/12 11:12 PM

More noticeable in the front.

Posted By: stumpy

Re: Schumacher engine mount vibration - 02/23/12 11:18 PM

Motor mounts won't cause vibrations just transmit them.

Posted By: DAYCLONA

Re: Schumacher engine mount vibration - 02/23/12 11:56 PM

There could be a possibility that the mounts may have changed your driveline angle,....procure an inclination meter, measure the degree/angle of the oilpan lip, find a parallel centerline of the transmission to measure from, as well as the rear pinion centerline, you'd like to see the engine/transmission, and the rear pinion exhibiting the same/parallel angles with each other, and the driveshaft deflected at an opposite angle of 2 degrees approx,...

I'll post a pic tonight

Mike

Posted By: SV_MOPARS

Re: Schumacher engine mount vibration - 02/24/12 12:05 AM

i was having the same problem with a 65 dodge a990 clone i built for a guy, i tried everything 3 times, pinion angle up,down,2 and 4 degree's, new driveshaft balanced and rebalalanced, axles checked, wheels and tires, pulled the trans twice and had direct drive drum changed, called schumacher, prayed a couple of times, i could go on, still doing the same thing, it finally broke me and i gave up, the owner is suppose to be taking it to oceanside driveline to see if they can figure it out

Posted By: Moonraker

Re: Schumacher engine mount vibration - 02/24/12 12:06 AM

I had both engine and tranny mounts from Schumacher and had vibrations transmitted through the body like crazy. Changed out the engine mounts and that helped a little then changed the tranny mount back to rubber and the vibrations pretty much went away. It has nothing to do with Schumacher really just the poly mounts in general seem to transmit vibrations more. This is also kind of hit and miss as some guys get those vibrations with poly...some dont. In my case poly was the issue. If it were me I would start with the mounts first and then move onto other things mentioned in the posts above.

Posted By: Mr T2U

Re: Schumacher engine mount vibration - 02/24/12 12:44 AM

you might try to loosen up the mounts. lift the motor up a bit. shake the motor to reposition it a bit. then drop it back down and re-tighten everything.

Posted By: Pacnorthcuda

Re: Schumacher engine mount vibration - 02/24/12 01:20 AM

Quote:

I had both engine and tranny mounts from Schumacher and had vibrations transmitted through the body like crazy. Changed out the engine mounts and that helped a little then changed the tranny mount back to rubber and the vibrations pretty much went away. It has nothing to do with Schumacher really just the poly mounts in general seem to transmit vibrations more. This is also kind of hit and miss as some guys get those vibrations with poly...some dont. In my case poly was the issue. If it were me I would start with the mounts first and then move onto other things mentioned in the posts above.

I also had it happen after installing two Schumacher poly locs. Started up the car and didn't even drive it. The Steering wheel just BUZZED in my hands. Replaced the passenger side mount with stock--90% of the vibration was gone-I am happy.

Posted By: redex79

Re: Schumacher engine mount vibration - 02/24/12 03:10 AM

well, looks like there might be a k member change coming.

Posted By: 1967GTX440

Re: Schumacher engine mount vibration - 02/25/12 03:16 PM

I replaced my motor mounts and trans mount with Schumacher mounts on my 67 GTX 440 the one motor mount came out in 2 pieces org. mounts should have been changed when the engine was done.New mounts lifted the engine over an inch vibration is now complety gone.

Posted By: ThermoQuad

Re: Schumacher engine mount vibration - 02/25/12 05:30 PM

STOP!!!!!!!!!!!!!!!!
you are wasting your time, I have been down this road before. The mounts create a geometry issue that the only cure is a hemi k frame.

Posted By: redex79

Re: Schumacher engine mount vibration - 02/25/12 06:19 PM

There you go! A voice of experience. I was wondering about that after looking at the mounts. So, here I go, on the look for a K member. Thanks, Tom_Quad

Posted By: SV_MOPARS

Re: Schumacher engine mount vibration - 02/25/12 10:42 PM

Quote:

STOP!!!!!!!!!!!!!!!!
you are wasting your time, I have been down this road before. The mounts create a geometry issue that the only cure is a hemi k frame.

can you elaborate?

Posted By: BradD

Re: Schumacher engine mount vibration - 02/26/12 03:29 AM

Polyurethane is much denser than rubber. The Schumacher hemi to b kmember mounts have small diameter bushings which will not cushion the vibrations especially with more cam in a motor. We found the Schumacher mounts also raise the motor higher than stock which changes the driveline angle. Add a Poly trans mount and you amplify the vibrations more.
I run rubber mounts whenever I can on street cars!

Brad

Posted By: ThermoQuad

Re: Schumacher engine mount vibration - 02/26/12 02:16 PM

Using the adapter mounts the position of the engine in the engine bay ends up in the wrong location. We measured after fighting with the product and found the error. Some one did not do their homework so in typical American fashion we get another 80% product instead of the required 100%.

It's always our choice to accept mediocrity when excellence is required.

Posted By: 71birdJ68

Re: Schumacher engine mount vibration - 02/26/12 03:45 PM

Call Mega Parts and get a K frame, bet you didn't know that 71 B and E body engines sit in the car different than older b bodies. I didn't eather till i talked to them.Nice people.

Posted By: SV_MOPARS

Re: Schumacher engine mount vibration - 02/26/12 04:59 PM

thanks for the response, i guess i will have to check with mega parts and see if they fab hemi k members for early b-bodies. one more thing, this particular car has the vibration at about 60mph, if you drop it in neutral going down hill the vibration is still there with the car idiling at about 1000rpm which would tell me its probably not the poly mounts but more of a geometry issue right?

Posted By: maxie

Re: Schumacher engine mount vibration - 02/26/12 05:10 PM

Call Aruzza and get the hemi mounts he makes for the wedge K frame. That is what is in the road runner. Works like a champ! Put the motor in the correct location, we didnt have to use the TTI headers that are made for the wrong location of the other mounts.

Posted By: SV_MOPARS

Re: Schumacher engine mount vibration - 02/26/12 05:15 PM

already have the tti headers, i will check with john. checked aruzza's site and he does not offer early b-body hemi mounts, i would have to use a later b-body k member which could end up being a problem with the tti headers and who knows what else.