Holy crap.

I just put in a set of poly motor and transmission mounts (which WERE NOT cheap), and it feels like I'm sitting on the motor now.

It's got this thrumming vibration, especially at idle, that you feel rather than hear, that's kind of like being in a plane, especially when they adjust the flaps and you feel it in your (very thin) seat.

NOT what I was expecting.

And, No, nothing it touching anything now. I've got a lift, I walked around and checked before I put the car down.

I just bought a set of Pioneer mounts from RA (at least their offices are in the US), and I'll be swapping them out at the earliest opportunity. And I never just jump and buy parts without thinking about it first. The ride is that totally unacceptable.

If someone who's used these can tell me that they soften up in a week or two, or something like that, I'll send the RA parts back, but otherwise, you'll be seeing these listed in the For Sale section.

- Eric

I had a poly trans mount in my old Duster. Yes, it transmitted vibrations. No, it never got better.

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Official Cookie and Mater Tormentor.

Didn't think so.

New Pioneer "Made by People who Work for People in the USA" mounts are on the way.

Now that I've got the technique down, and I've made my handy Slant-Six Jacking Cradle™, which helps orient the engine while I lift it, the job should take less than an hour.

Thanks.

Very nice!

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Official Cookie and Mater Tormentor.

Thank you.

The idea was to make it less likely to tip to the passenger side.

If you look at the engine cutaway at the top of this page, it looks as though the center of gravity is roughly right above the passenger side oil pan flange, so that seemed to be the ideal jacking point, but, you know, it's a bit narrow, and would be unstable as hell.

So I made a piece the size of the oil pain, then another one that fit along the side and rested up against the flange screws, and made it protrude down just a hair longer than the bottom piece, so there would be some force on it, and put another piece under both to distribute the force.

I have no idea whether my figuring was correct, but the engine didn't show any tendency to tip toward the passenger side, and i was able to jack it up high enough to extract the passenger-side mount and bracket as a unit from the bottom (no need to mess with the fuel pump), so I'm happy.

- Eric

Wonder if those PB mounts got "improved" with a stiffer grade of poly—I remember talking to Johnny (@PB) about keeping to the softer grade, at least for my mounts, many years ago. I didn't get the shake-you-off-the-seat treatment from them.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Yeah, they felt pretty firm compared to other "stock-type" ones I've felt in the past, but I'm not sure one can tell just by pushing on them.

It was more than "pronounced." Like, my initial response was "Holy $h|t I f***ed something up!"
The dashboard buzzed and rattled and everything.

We'll see what the new ones are like.

- Eric

What durometer did you use? I have the softer grade ones, and they don't really have issues.

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Matt Cramer
1966 Dodge Dart turbo / EFI project

I do not have a durometer.

I am using the ones that DAN (ahem) ( ) recommended (Polybushings.com, Johnny Spiva), and there are no hardness options.

- Eric

I think by "what durometer did you use", he meant to ask which grade of polyurethane your mounts were made of. It must have slipped my mind completely when I pointed you at them, to recommend that you specifically ask for soft rather than hard poly. Give Johnny a ping and see if he'll work with you. Failing that, put the too-hard ones up for sale here and on FABO; someone will, Shirley, square you up on 'em.

I like that lift fixture!

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Ah, Of course. Sort of like the commonly-used "What speedometer were you going when the cop clocked you?"
Can happen to anyone, but I believe it slipped your mind every other time you recommended them to anyone anywhere ever.
Eh. I bought 'em. It's not his fault if I didn't know that.
It IS his fault, though, if there are, in fact, two or more hardness levels, and he doesn't mention that anywhere (or anywhere prominent?) on the web site where he sells them.
That's not great business.
edit: The listing says, "Made of 60 Durometer polyurethane."
That's my plan. I don't expect they'll last long.
And don't call me Shirley.
Thank you. I looked at the engine and thought, "I'd really like to lift it by the passenger-side oil pan flange, but that wouldn't work in the real world."
Then I watched a video where a guy lifted the engine with a patio paver between the jack and the oil pan, which made me want to take a shower, for two completely different reasons.
Then I held up a 2x12 cutoff, and saw that I'd need to trim off the corners to get it past the K-frame.
Then I got out the miter saw, and once I got to cuttin', I just couldn't stop.

– Eric

edit: Added hardness spec. from motor mount catalogue listing.

Well…no, not really; nobody ever says that. But "Durometer" is both the name of the device for measuring the hardness of a material, and a common conversational substitute for "hardness", which is what is really meant. It's more like when people talk about an earthquake being "6.2 on the Richter scale": it's technically wrong—the correct term is magnitude—but people say it anyhow.
Could certainly be; I don't claim perfection.
Looks like I picked the wrong week to quit usin' durometers! I used a plank between the floor jack and the bottom of the oil pan, with only one engine mount unbolted at a time. That is: first I swang the engine up such that it pivoted on the left mount while I replaced the right one, then the other way round.
Gross. I'm not into snuff films.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

It's called "sarcasm" Dan. But I know you would never use that particular rhetorical device.
I'm from the East Coast. We don't discuss earthquakes. We just look at each other, shake our heads, and say, "Why would anyone want to live out there?"
Well, you oughtta talk to whoever manages your reputation, then, because they're sending out false advertising.
Looks like I picked the wrong week to quit using multilevel hierarchic quotes.
I wanted to be sure I could get the whole right-side assembly out as a unit, so didn't want to have to keep one mount attached – remember, I'd never done this before.
Couldn't'a said it better.
(Actually near the top of my list of Worst YouTube Videos Ever.)

– Eric

IIRC, the 60 durometer ones were the soft version. These are stiffer than stock, but shouldn't be rough.

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Matt Cramer
1966 Dodge Dart turbo / EFI project

When the motor is idling, it feels like someone's hitting the frame with a 20# sledgehammer.

Compression is even, within spec, valves are adjusted, engine is otherwise smooth, and can be idled down very low, if desired.
Exhaust system is not hitting anything.

The new, "regular" mounts should come tomorrow, and I should have a chance to install them a few days later.
That will eliminate anything else as the culprit, at which point I'll have something intelligent to say on the subject.

– Eric