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I must have the wrong motor mounts for my 65 sb. When I tried to mount the lower V ignition shielding, the shielding's forward mounting hole cannot get close enough to insert the 3/8 bolt into the block through motor mount. The shielding runs into the vulcanized rubber of the mount. My engine mount looks like the mount GM parts direct has on their website. Will Paragon's mount allow the installation of the shielding? Where else can I get one? Does someone have a photo of a correct mount? Thanks DG
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Re: C2 Motor Mount?
Dick-----
This is a common problem. Actually, it's addressed in an instruction sheet that is supplied with the GM motor mount. However, it's not addressed in the packages of motor mounts of other manufacturers.
The deal is that 1963-69 Corvettes originally used a non-locking style mount. This mount works with the style lower ignition shield used from 1963-69.
From 1970 onward, GM no longer serviced the non-locking style mount. Instructions supplied with the mount directed that when the mounts are used on Corvettes with ignition shielding, that the V-shields have to be modified and the instructions describe how this is to be done.
You can get the non-locking mounts from just about any of the Corvette vendors like Dr. Rebuild, Paragon, etc. They can also be obtained from many auto parts stores. These mounts will allow your existing shields to be used as-is. However, I do not recommend the use of the non-locking mounts for any DRIVEN 63-69 Corvette. To use the locking style mounts on a 63-69 Corvette small block, you have these options:
1) remove and leave off the lower V-RF shields;
2) modify the shields to accomodate the locking style mounts;
3) purchase the 70+ style shields which are designed to accomodate the locking style mounts. These shields are available in reproduction.
My choice would be (3).In Appreciation of John Hinckley -
Re: C2 Motor Mount?
Dick-----
This is a common problem. Actually, it's addressed in an instruction sheet that is supplied with the GM motor mount. However, it's not addressed in the packages of motor mounts of other manufacturers.
The deal is that 1963-69 Corvettes originally used a non-locking style mount. This mount works with the style lower ignition shield used from 1963-69.
From 1970 onward, GM no longer serviced the non-locking style mount. Instructions supplied with the mount directed that when the mounts are used on Corvettes with ignition shielding, that the V-shields have to be modified and the instructions describe how this is to be done.
You can get the non-locking mounts from just about any of the Corvette vendors like Dr. Rebuild, Paragon, etc. They can also be obtained from many auto parts stores. These mounts will allow your existing shields to be used as-is. However, I do not recommend the use of the non-locking mounts for any DRIVEN 63-69 Corvette. To use the locking style mounts on a 63-69 Corvette small block, you have these options:
1) remove and leave off the lower V-RF shields;
2) modify the shields to accomodate the locking style mounts;
3) purchase the 70+ style shields which are designed to accomodate the locking style mounts. These shields are available in reproduction.
My choice would be (3).In Appreciation of John HinckleyComment
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Locking mounts
I assume that the "locking" type of mount is a safety feature in case the mount breaks. How often do new non-locking mounts break, and what is the danger if they do fail?
Thanks,
BrandonComment
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it could bind up the throttle linkage
at WOT. the fan will also hit the fan shroud. been there done that just as i was pulling out of the drive on our way to fla for vacation. better there than on the road. used a old drag strip trick,chained the engine down and left for vacation.Comment
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Re: Locking mounts
Brandon-----
During the 1969-70 period, GM undertook a massive recall campaign to retrofit certain previous year model Chevrolets with the locking style mounts. This campaign was hugely expensive. In some cases, there were installed specially designed "cable-and-bracket" kits to prevent excessive engine movement in the event of a mount breakage. In other cases, the new style locking mounts were installed. From the 1970 model year and later, ONLY the locking style mounts were used on Chevrolets (at, undoubtedly, greater per piece cost than the earlier non-locking style mounts). Also, from very early 1970 onward, ONLY the locking style mounts were available from GM in SERVICE for all earlier models.
Now, you don't suppose that GM did all this because there was no significant problem with the non-locking style mounts and the non-locking style mounts were just as good?In Appreciation of John HinckleyComment
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Re: Locking mounts
If you've never had a motor mount break when the engine torques up and it suddenly goes WOT you missed a wild ride. Happened to me in a SB Camaro after a cam change and a new Torker manifold. I almost messed my pants.
BLComment
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i never had this happen on any chevy except
my 1968 impala. i wonder if they did something different in 1968 to the mounts to cause this problem.you would think that the BB corvettes would tear the mounts apart in 1965,66 or 67 but i never heard of those cars having a problem. my 68 was aPG car was not subjected to the abuse my corvettes were like full throttle starts.Comment
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Re: i never had this happen on any chevy except
clem------
I once purchased new a 1966 Chevelle SS 396 with L-34 engine and a 1968 Chevelle SS 396 with L-78 engine. Both obviously had the old style, non-locking mounts. I never broke one. I never broke the original non-locking mounts in my 1969 Corvette, either. So, my experience with non-locking mounts has been great. That being said, would I use a non-locking mount today for any Chevrolet application? No. At least, I wouldn't do it if I intended to drive the car. If I didn't intend to ever drive the car, that's a different story.In Appreciation of John HinckleyComment
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A long time ago, I heard a story
So I can't vouch for the fact or fantasy of it. But I heard these locking mounts all came as a result of a lawsuit due to a kid crashing a big block Chevy into the stands at a drag race when the engine twisted and the throttle locked open.
Now I have cause to doubt that as much as anyone, since most drag strips you are long past the stands of people before you could run off to the side UNLESS you were to basically turn left or right as soon as you took off.
That said, I have been known to smash the pedal more than once, in a lot of different Chevy vehicles, and the only ones I ever had a broken mount in were a '63 Chevy 283 PG wagon and a '65 Chevy 396 TH wagon. The '63 broke a few, but only the right one broke and all that ever happened is the fan would bang the shroud. There wasn't much more than a half inch clearance anyway, and the engine would almost torque that much with new mounts.
Both had pulled trailers and some heavy loads being wagons.
I bought a 396 out of a Chevy once. I could keep you laughing for a half hour with the story of these clowns removing it, but suffice to say, they forgot to remove the mounts and while pulling the engine with a wrecker, they managed to tow the whole car around the field a few times and the mounts never broke!
All in all, I think there is a lot of worry over nothing. I think this ranks much lower than the danger of a tire blowing, a wheel falling off, a convertible Corvette rolling over, the gas tank blowing up with gas all over the passengers, and so on. Any of these are a possibility, however, I don't see anyone here worrying about them or quit driving their Corvettes as a result.
Heck, you are in more danger from a flywheel or clutch blowing up and cutting your foot off with those aluminum bellhousings. How many of you have changed those out for a Lakewood in all of your street cars?Comment
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