383 keeps breaking mount

[Gerald Morris]

Very good point .. It’s not in great shape to be honest , intact but noticeably weathered . I have to pull the driveshaft to replace I joints so I’ll probably replace that while I’m down there . I’ll definitely report back on the Mity mounts down the road, assuming anyone’s interested in how they pan out.

Actually, the "Anchor" brand made in Korea as a cheap mount does very nicely, WITH the torque strap. Those rubber biscuits of the mid-1960s do fine for absorbing engine vibrations, unlike the synthetic stuff, and ALL of them will tear off on the driver side, if nothing restrains the engine from riding up. I used a length of chain before I bought the proper cable "strap."

 

[CBODY67]

Perhaps the "Mity Mounts" have a fall-safe interlock as the later-style Chevy mounts do from the factory? They can still fail, but the engine only moves a certain amount before the internal lock limits travel?

Consider the trans mount as the rear pivot point for the engine when the lh engine mount fails

Take care,
CBODY67

 

[Gerald Morris]

Perhaps the "Mity Mounts" have a fall-safe interlock as the later-style Chevy mounts do from the factory? They can still fail, but the engine only moves a certain amount before the internal lock limits travel?

Consider the trans mount as the rear pivot point for the engine when the lh engine mount fails

Take care,
CBODY67

The one expedient which many use, though I've never felt compelled to try, using the strap as I do, is to insert a retaining bolt and washer combination into the driver side mount. It makes for a neater solution than the supplemental strap, chain or turnbuckle that people use, but I prefer not to subtract any amount of rubber from the biscuit myself.

I noticed some tears in the old transmission mount on Mathilda when I dismembered her remains. That 383 certainly will roll if allowed to....

 

[Big_John]

Perhaps the "Mity Mounts" have a fall-safe interlock as the later-style Chevy mounts do from the factory?

DynaTech Engineering - Mitymounts

Pretty much like the modification with the bolt that was posted on the first page.

 

[Gerald Morris]

DynaTech Engineering - Mitymounts

Pretty much like the modification with the bolt that was posted on the first page.

Yep! Had I not already got my strap, I probably would have bought this product.

 

[ayilar]

I have Mity Mounts on four C-bodies with BB engines. Zero issue.

 

[lemondana]

I'll use a 30 year old NOS mount before I'll use any parts store crap available today. I always chain with a short chain leaving a little slack and have never broke another.

 

[KTMonaco67]

I have Mity Mounts on four C-bodies with BB engines. Zero issue.

That’s good to hear! Are you running a torque strap / chain too or just the mounts by themselves?

 

[Jessica770]

That’s good to hear! Are you running a torque strap / chain too or just the mounts by themselves?

I’ve always run a strap along with the mounts saves a lot of headaches and keeps the driver’s side from tearing out so quick.

 

[ayilar]

That’s good to hear! Are you running a torque strap / chain too or just the mounts by themselves?

Short story: Nope.

Longer story: On Medina, my T-code (440) 1971 Monaco, I initially used Schumacher B/RB Poly-Locs due to several members' commenting on how sturdy they were. Well, they may be sturdy, but I did not keep them long enough to test their longevity -- those mounts were much too rigid for what I wanted, and the engine vibrations were felt inside the car. After 6 months/1k miles of driving (see here for details of my experience), I ordered Mity Mounts -- which, after doing quite a bit of research, I had concluded were the only high-quality alternative. As soon as they were installed, the roughness/vibrations went away (details here). Medina has been driven 10k miles or so since the swap back in 2019, and I am sold on the MM. That is why I have bought MM on my other cars that needed mounts.

 

[KTMonaco67]

Short story: Nope.

Longer story: On Medina, my T-code (440) 1971 Monaco, I initially used Schumacher B/RB Poly-Locs due to several members' commenting on how sturdy they were. Well, they may be sturdy, but I did not keep them long enough to test their longevity -- those mounts were much too rigid for what I wanted, and the engine vibrations were felt inside the car. After 6 months/1k miles of driving (see here for details of my experience), I ordered Mity Mounts -- which, after doing quite a bit of research, I had concluded were the only high-quality alternative. As soon as they were installed, the roughness/vibrations went away (details here). Medina has been driven 10k miles or so since the swap back in 2019, and I am sold on the MM. That is why I have bought MM on my other cars that needed mounts.

That’s encouraging, I’m glad they’ve been working out for you long term . Sweet ride btw!

 

[KTMonaco67]

Schumacher Creative Services Engine Mounts

http://[URL]https://www.hotrod.com/how-to/mopp-0801-parts-department-engine-mounts

[/URL]

Just in case anyone is wondering, I reached out to Schumacher before deciding on the Mity’s. This was the response I got

 

[MoPar~Man]

Just in case anyone is wondering, I reached out to Schumacher before deciding on the Mity’s. This was the response I got

To be honest, I probably wouldn't have bought them anyways, seeing that (I think) they were filled with polyurethane. Might as well fill them with iron. If they were rubber, that would be different.

 

[Jim 68cuda]

Putting my stock 383 Belvedere wagon together, I just used Anchor brand motor mounts as stocked by most local auto parts stores. The first drivers side mount broke and damaged the hood before we even had 50 miles on the car. Thought it was defective. The replacement Anchor mount broke taking off from the first STOP sign. Found a different brand of motor mount at Napa (might have even been Napa brand). That one was visibly better made and has lasted a few months and a couple thousand miles so far.

 

[KTMonaco67]

I have Mity Mounts on four C-bodies with BB engines. Zero issue.

Question for you when you have a sec, since you’ve had a good amount of experience … Is the threaded portion of the driver side mount usually on the RH side or LH side?

Previous mounts on the car had the threaded portion on the LH side of the mount, but the driver side labeled mount from Dynatech has it on the right , like the passenger side . Thinking they mislabeled the driver side mount but not sure .

 

[BrooklynBeer]

I chained the 383 in 'Tilly for years, until I got a cable to do the same. There is now at least ONE source of after market torque cables made for B/RB engine mounts. It might be 440 source. I always tether that driver side down, and LO! the mounts remain intact!

yep, always a chain

 

[ayilar]

Question for you when you have a sec, since you’ve had a good amount of experience … Is the threaded portion of the driver side mount usually on the RH side or LH side?

Previous mounts on the car had the threaded portion on the LH side of the mount, but the driver side labeled mount from Dynatech has it on the right , like the passenger side . Thinking they mislabeled the driver side mount but not sure .

Sorry for missing your question! I just responded to your PM. @71Polara383 should have the answer.

 

[71Polara383]

Question for you when you have a sec, since you’ve had a good amount of experience … Is the threaded portion of the driver side mount usually on the RH side or LH side?

Previous mounts on the car had the threaded portion on the LH side of the mount, but the driver side labeled mount from Dynatech has it on the right , like the passenger side . Thinking they mislabeled the driver side mount but not sure .

The bolt goes in from the backside on the drivers side, then on the passenger side the bolt goes in from the front.

Definitely sounds like they mislabeled it.

 

[KTMonaco67]

The bolt goes in from the backside on the drivers side, then on the passenger side the bolt goes in from the front.

Definitely sounds like they mislabeled it.

Thank you for chiming in… That was initially my thought as well, but the one labeled driver side , has the two bolts through the bottom which is only done on the driver side. I reached out to Dynatech but the convo stalled . I attached a few pics , drivers side mount is the one on the right in both pics .

 

[Gerald Morris]

.... Thought it was defective. The replacement Anchor mount broke taking off from the first STOP sign. Found a different brand of motor mount at Napa (might have even been Napa brand). That one was visibly better made and has lasted a few months and a couple thousand miles so far.

NAPA's "Balkamp" brand biscuit comes from Pioneer:

I used one of these on the driver side when I dropped that 65-66 model 383 into Gertrude 4 yrs ago. I bolted on the OEM "strap" with it then. One of the Korean mounts serves on the passenger side. No noticeable vibrations and the engine stays put exactly as meant to. IDK WHERE Pioneer gets their biscuits. If one believes the same IDENTICAL SCREED from 440 Source and Mancini, then aside from their Exalted, Pure, All American Selves, the Forces of Darkness make their unter-biscuits in a duopoly business all in Mordor and Isengard. The dread Mark of the Inferior Biscuit is: "2250." One can see that Pioneer/NAPA sells this Evil Ware too....

Anyway, I'm glad I have my strap. Asian countries DO know how to cook decent rubber, if motivated to do so.