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Old 01-30-2013, 06:19 PM
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Motor mount?

I have 2 polyurethane mounts on the motor and 1 on the trans. I'm wanting to put a solid motor mount on the drivers side to prevent some of the movement of the motor. Starting to see a small 1/8 inch "not very big" split in the poly on the drivers side were all the torque is going on, so I was wondering which mounts some of you have because If I order one for the drivers side I want to make sure it's the same height as the poly on the passenger side. Any particular combo of mounts? I could chain the driver side and limit movement that way along with playing it safe! Ideas. It's a BBC 496. Thanks
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Old 01-30-2013, 06:23 PM
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Use a chain or solid turnbuckle, I dont think using one solid mount is a good idea. Besides if its a daily driver you wont like the vibration
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Old 01-30-2013, 07:30 PM
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Quote:
Originally Posted by Richiehd View Post
Use a chain or solid turnbuckle, I dont think using one solid mount is a good idea. Besides if its a daily driver you wont like the vibration
I was thinking just a chain and be done with it. A lot easier than jacking the motor. Just wanted to hear it from some one else also to help me make my mind up! I drive it on the weekend sometimes and occasional trip to the strip for a pass or two 648 hp to the crank, so I didn't want to not do anything, but the chain should be good enough. I just wanted to limit some of the movement of the motor it moves a little to much.
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Old 01-30-2013, 08:40 PM
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The original fix from GM was a cable.
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Old 01-30-2013, 08:50 PM
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Something is popping in my head about those cables being called "Nader cables" because Ralph Nader forced GM to use them. Is that my brain just scouring thru files and coming up with a pile of poop or is there something to that?

Brian
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Old 01-30-2013, 10:09 PM
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Not sure about Nader, but it wouldn't surprise me. Seems he stuck his nose into a lot of places where he wasn't welcome....here's a post on steve'snovasite.com.....

Build Years/Makes/Models: 1967 - 1969 CHEVROLET CAMARO
1965 - 1969 CHEVROLET CAPRICE
1965 - 1969 CHEVROLET IMPALA
1965 - 1969 CHEVROLET NOVA
1965 - 1970 CHEVROLET C SERIES
1967 - 1970 CHEVROLET G SERIES
1965 - 1969 CHEVROLET CHEVY II
1965 - 1969 CHEVROLET BELAIR
1965 - 1969 CHEVROLET KINGSWOOD
1965 - 1970 CHEVROLET CHEVROLET
1965 - 1969 CHEVROLET TOWNSMAN
1965 - 1969 CHEVROLET BROOKWOOD
1965 - 1970 CHEVROLET P SERIES
1967 - 1970 GMC C SERIES
1967 - 1970 GMC G SERIES
1968 - 1970 GMC P SERIES

UNits affected: 6682084

Recall Number: 71V235000

Summary: THERE IS A POSSIBILITY THAT A SEPARATED MOTOR MOUNT MAY ALLOW THE ENGINE TO LIFT, WHICH MAY AFFECT THE THROTTLE LINKAGE, MOMENTARILY INCREASING THROTTLE, POSSIBLY TO FULL THROTTLE.

Consequence: UNEXPECTED LOSS OF THROTTLE CONTROL MAY CAUSE LOSS OFVEHICLE CONTROL AND AN ACCIDENT.

Remedy: INSPECT ENGINE MOUNTS AND INSTALL RESTRAINTS WHICH WILL LIMIT ENGINE LIFT AND ELIMINATE POSSIBLE SECONDARY EFFECTS TO THE THROTTLE LINKAGE DUE TO ENGINE MOUNT SEPARATION.

Notes: SYSTEM: ENGINE.VEHICLE DESCRIPTION: PASSENGER VEHICLES, LIGHT TRUCKS AND VANS.
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Old 01-31-2013, 06:27 AM
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Quote:
Originally Posted by techinspector1 View Post
Not sure about Nader, but it wouldn't surprise me. Seems he stuck his nose into a lot of places where he wasn't welcome....here's a post on steve'snovasite.com.....

Build Years/Makes/Models: 1967 - 1969 CHEVROLET CAMARO
1965 - 1969 CHEVROLET CAPRICE
1965 - 1969 CHEVROLET IMPALA
1965 - 1969 CHEVROLET NOVA
1965 - 1970 CHEVROLET C SERIES
1967 - 1970 CHEVROLET G SERIES
1965 - 1969 CHEVROLET CHEVY II
1965 - 1969 CHEVROLET BELAIR
1965 - 1969 CHEVROLET KINGSWOOD
1965 - 1970 CHEVROLET CHEVROLET
1965 - 1969 CHEVROLET TOWNSMAN
1965 - 1969 CHEVROLET BROOKWOOD
1965 - 1970 CHEVROLET P SERIES
1967 - 1970 GMC C SERIES
1967 - 1970 GMC G SERIES
1968 - 1970 GMC P SERIES

UNits affected: 6682084

Recall Number: 71V235000

Summary: THERE IS A POSSIBILITY THAT A SEPARATED MOTOR MOUNT MAY ALLOW THE ENGINE TO LIFT, WHICH MAY AFFECT THE THROTTLE LINKAGE, MOMENTARILY INCREASING THROTTLE, POSSIBLY TO FULL THROTTLE.

Consequence: UNEXPECTED LOSS OF THROTTLE CONTROL MAY CAUSE LOSS OFVEHICLE CONTROL AND AN ACCIDENT.

Remedy: INSPECT ENGINE MOUNTS AND INSTALL RESTRAINTS WHICH WILL LIMIT ENGINE LIFT AND ELIMINATE POSSIBLE SECONDARY EFFECTS TO THE THROTTLE LINKAGE DUE TO ENGINE MOUNT SEPARATION.

Notes: SYSTEM: ENGINE.VEHICLE DESCRIPTION: PASSENGER VEHICLES, LIGHT TRUCKS AND VANS.
When my brother was just a kid out of highschool working as an apprentice at a local dealership they had a ramp that lead up into the shop. He was moving a truck into there and had to gas it a little to get it up this ramp, you guessed it, it was there for a broken motormount and the throttle stuck. He ran the truck into another customers car pretty hard from what I remember him saying. Yes it can happen!

Brian
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Old 01-31-2013, 07:43 AM
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If you use a cable, chain or turnbuckle don't mount it solid. Leave lots of slack in it. If you make it solid you'll learn about torque steer when you get on it hard. The twist of the motor will pull on the frame distorting the front suspension geometry. Gets real squirelly in a big hurry. That was my experience on my LS6 chevelle. Some expert opinions may differ.
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Old 01-31-2013, 08:03 AM
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pinto pogo

Pinto engines used to POGO bounce at about 60 to 70 Mph on railroad transporters, and the aircleaner stud would put a ding in the hood, They used limiter cables until motor mounts were redesigned,
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Old 01-31-2013, 08:48 AM
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Quote:
Originally Posted by MARTINSR View Post
When my brother was just a kid out of highschool working as an apprentice at a local dealership they had a ramp that lead up into the shop. He was moving a truck into there and had to gas it a little to get it up this ramp, you guessed it, it was there for a broken motormount and the throttle stuck. He ran the truck into another customers car pretty hard from what I remember him saying. Yes it can happen!

Brian
I had a guy hit a phone pole dead center in an old Impala in front of my old shop. Had the pole not been there he would have crashed right in to my office where I was sitting. First thing he said when he got out of the car was the gas pedal stuck!
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Old 01-31-2013, 09:12 AM
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I ran a solid mount on the drivers side of my BBC Impala with a rubber mount on the other. Headers were so close to the steering shaft, it would pin it under WOT and make it hard to steer. Vibration wasn't noticed with 3'' exhaust and too large camshaft.
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Old 01-31-2013, 09:19 AM
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Those pre-cable mechanical linkages don't look like they could ever be a problem, with the crosswise pivit right on the firewall, but I guess they could be. I can think of other reasons I'd like to not have a motor mount separate, as well.

A bud spent a bunch of money on a 454 Vega back when...the builder had used a solid rod going through a hole in the firewall for throttle linkage and when freind flashed the converter in his driveway to test it (basically, a quick wide-open-throttle blip), the torque twisted the (stock) subframe around enough that the rod moved and jammed against the side of the hole...at that point the power was jamming the rod, and the rod was keeping the power on. The brakes couldn't hold the car and then that was the end of the Vega as well as his Firebird down the driveway, which he crashed into. Total bummer, caused by a sloppy build and failure to recognize it.

Chained motor mounts always seemed to me the way to go on the street with those old GM flat ones, where you can let normal soft mounts move around (and keep things quiet) until the point where they start to stress out too much and then have a solid limiter. Solid mounts actually won't put a lot of noise into the interior on a full-frame/rubber-body-mount but have a tendancy to crack after many street miles. One solid- and one soft-motor mount is "generally" a no-no in any event, but we know how those things can go...
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Old 01-31-2013, 09:36 AM
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caddy steering

GM got a lot of bad press when they had to send a repair team to check out the POPE's Caddy Limo. Broken motor mounts let the engine move and bind the steering rag joint.
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