Slant Six Forum :: Early A engine mounts now available

Well, OK, are we maybe talking about not only reproducing the stock mounts, but maybe improving on them? I've had a few ideas on that front over the years...the stock '62-'66 style mounts work OK, nothing really wrong with them, but there are stronger designs that are better in one or more ways. I'm thinking for example of the vertical-shear mounts that were used in the '60-'61 A-bodies (and in the trans mount from '62-'72).

AFAIK nobody makes polyurethane engine mounts for '67-'72 Slant-6 A-bodies.

What I would like to see addressed is the fore/aft flexibility of the early mounts, perhaps polyurethane would do that. I have seen more than one early A-body with a circle inscribed on the radiator where the engine has pitched forward during a panic stop or mild collision, pushhing the fan into the radiatior. There is precious little clearance anyway and the thick, soft rubber of the stock mounts allows a lot of movement.

I'm not sure if they are the right ones but doesn't the slant and v-8 use the the same mount?

Author:	Matt Cramer [ Thu May 11, 2006 5:45 am ]
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Quote: Well, OK, are we maybe talking about not only reproducing the stock mounts, but maybe improving on them? I've had a few ideas on that front over the years...the stock '62-'66 style mounts work OK, nothing really wrong with them, but there are stronger designs that are better in one or more ways. I'm thinking for example of the vertical-shear mounts that were used in the '60-'61 A-bodies (and in the trans mount from '62-'72). I'm thinking a set of improved stock replacement mounts. They won't require using different brackets. This way I can keep the cost and effort to a minimum. The biggest differences are in the materials and that I will add something inside to prevent them from coming apart if the rubber peels off its backing plates. I can probably get them in different durometers depending on whether you want a daily driver or a racing buildup. Quote: AFAIK nobody makes polyurethane engine mounts for '67-'72 Slant-6 A-bodies. Those can be next. If these really take off, I might consider a run of something more ambitious, like a spool mount conversion, or a way of using modern liquid-filled motor mounts in an A-body.

Author:	dakight [ Thu May 11, 2006 6:45 am ]
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What I would like to see addressed is the fore/aft flexibility of the early mounts, perhaps polyurethane would do that. I have seen more than one early A-body with a circle inscribed on the radiator where the engine has pitched forward during a panic stop or mild collision, pushhing the fan into the radiatior. There is precious little clearance anyway and the thick, soft rubber of the stock mounts allows a lot of movement.

Author:	Matt Cramer [ Thu May 11, 2006 7:20 am ]
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dakight, that happened to my Dart too - in fact, it was the reason why the car was for sale. I'll see if I can come up with anything - probably a different cross-section to give them the same stiffness in compression and tension, but much higher stiffness in torsion and shear.

Author:	SlantSixDan [ Thu May 11, 2006 7:56 am ]
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Quote: What I would like to see addressed is the fore/aft flexibility of the early mounts, perhaps polyurethane would do that. I have seen more than one early A-body with a circle inscribed on the radiator where the engine has pitched forward during a panic stop or mild collision, pushhing the fan into the radiatior. There is precious little clearance anyway and the thick, soft rubber of the stock mounts allows a lot of movement. This is exactly why I would like to see vertical-shear mounts just like the very robust '60-'61 items. They saved a few pennies per mount by going to the '62-'66 sandwich-style mount, which is unfortunately just how the car industry works. But even the original rubber (not poly) '60-'61 items last a lonnnnng time without allowing the kind of fore/aft engine flop you mention here. They also do a better job of restraining engine roll about the axis. The '73-up spool-type mounts likewise do a better job restraining the engine, but I'm not sure they have enough cushion to them to be completely acceptable in the earlier cars (which don't have cushion-mounted bodies and other NVH isolation measures added in the early-mid '70s). As far as liquid-filled engine mounts...color me skeptical. They've always ever seemed to me to have a shorter service life and a much higher replacement cost, without any enormous huge benefit.

Author:	Matt Cramer [ Thu May 11, 2006 8:07 am ]
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Got any pictures of the vertical-shear mounts?

Slant Six Forum https://www.slantsix.org/forum/

Early A engine mounts now available https://www.slantsix.org/forum/viewtopic.php?t=17495	Page 2 of 3

Author:	SlantSixDan [ Thu May 11, 2006 8:14 am ]
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Pictures...can probably come up with some if you'll give me some time. I even have NOS vertical-shear '61 mounts. Of course they bolt right onto any year slant-6 engine, but they don't drop directly onto a '62-'66 car, because the mounting tabs (where the mount bolts to the K-frame) are located a little differently). Doesn't seem like this would be difficult to change if one were interested in making new steel brackets anyhow.

Author:	gmader [ Thu May 11, 2006 9:25 am ]
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I am in for set. Mine are pretty ate up. Greg

Author:	mopardemon71 [ Fri May 12, 2006 8:19 am ]
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I'm not sure if they are the right ones but doesn't the slant and v-8 use the the same mount? I have a 74 and would like poly's for it but they only have v-8 spool type mounts. If the 62-66 is the same then year one sells a blow prof stye biscuit motor mount.

Author:	slantvaliant [ Fri May 12, 2006 11:00 am ]
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There is a thickness difference in some years. Several years ago, I replaced motor mounts. At idle, in gear, there was an ugly noise. It turned out that one engine mount was too short, and the pan was contacting the K-member. The mount (Passenger side, IIRC) was actually for a V8 car. It was about 3/8" too thin. A new mount from a different vendor, for a Slant six, was thicker and solved the problem. Sorry, I don't remember the vendors involved, and I can't seem to find the thread on search.

Author:	SlantSixDan [ Fri May 12, 2006 1:33 pm ]
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Quote: I'm not sure if they are the right ones but doesn't the slant and v-8 use the the same mount? No.

Author:	SlantSixDan [ Thu Jul 13, 2006 8:25 am ]
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Imperial Services is in final stages of tooling for really nice polyurethane left and right mounts, made in America, with internal lock plates, for '62-'66 A-bodies with slant-6s! Just got off the phone with Steve over there, and it surely sounds as if these are going to be the excellent-quality upgrade mount we've been after for quite a few years for these cars. That's the good news. The bad news is that in all likelihood they won't be shipping until 1/07.

Author:	Matt Cramer [ Thu Jul 13, 2006 8:32 am ]
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Good to hear that, Dan! I haven't been able to give these things front burner status, as I've had a lot of other things to worry about. Glad to hear that someone's picked up this. I might have to order a pair myself.

Author:	Guest [ Thu Jul 13, 2006 11:31 am ]
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Count me in.

Author:	Old6rodder [ Thu Jul 13, 2006 11:44 am ]
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Thanks for the link, I'm in line too.

Author:	Guest [ Thu Jul 13, 2006 12:03 pm ]
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I just ordered one from Paddock as suggested by Charlie S. STANDARD OE MOTOR MOUNT FITS 62-66 A-BODY 170, 225, RH. Product Number EM2304 Price:$17.95 Quantity: FYI. Thanks all.

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