Big Block Motor Mount Question
Thread Starter
Instructor
Joined: Aug 2008
Posts: 107
Likes: 38
From: Raleigh North Carolina
Big Block Motor Mount Question
I'm in the process of a body off restoration and have most of the chassis done so I started looking around for new motor mounts. Car is a 1970 454 numbers matching. Before I got it, it spent it's whole life in California and was never wrecked. Anyway, I find a local parts store can order them overnight. The next day I pick them up, take them home and they're too big, by about half an inch where they sit on the frame. I hold the new one up to the old one and sure enough these are not the same part. So I look online at all the major corvette vendors and again, the part that they show is not the part I need. In the end I find the motor mount I'm looking for actually matches up with a 1967-69 427. Can anybody think of a reason for this? Did they have a bunch of frames left from the previous years big block cars that half of the 70's big blocks ended up with these frames and the later 70's possibly had different, wider motor mounts? Like I said, I think my problem is solved but something just doesn't seem right. Thanks everybody.
The one that matches mine is below
The one most vendors are saying fit my specific vehicle below
http://www.parts123.com/parts123/yb....0g~Z5Z5Z5GBFPF
My body off progress so far:
http://www.facebook.com/photo.php?fb...570.1524483562
The one that matches mine is below
The one most vendors are saying fit my specific vehicle below
http://www.parts123.com/parts123/yb....0g~Z5Z5Z5GBFPF
My body off progress so far:
http://www.facebook.com/photo.php?fb...570.1524483562
Last edited by cmhidinger; Jan 26, 2011 at 10:32 AM.
Thread Starter
Instructor
Joined: Aug 2008
Posts: 107
Likes: 38
From: Raleigh North Carolina
Thanks for the photo. From that angle it looks slightly different than both of the examples I posted. Could just be the angle? I know it's not the easiest part to photograph so thanks again.
Chad
Chad
Melting Slicks
Joined: May 2009
Posts: 3,079
Likes: 314
2024 C3 of the Year Finalist - Unmodified
Chad
My replacement mounts are Federated #2249 and are non-locking type mounts. I got them thru a former NCRS chief judge. They look the same as my supposed originals, which I have in a box somewhere. Notice the steel tang that protrudes at the bottom of the mount and the heat shield (driver side only.)
The mount you have looks like a locking type mount and I do not believe the factory used them in either of our year cars. If it looks like the one you are replacing, it is entirely possible that one is not original to the car. Many years have passed and these big blocks eat rubber motor mounts.
The one that most vendors are saying is a non-locking type and does not appear to have the large steel tang that mine has. Really don't know what to tell you.
FR
My replacement mounts are Federated #2249 and are non-locking type mounts. I got them thru a former NCRS chief judge. They look the same as my supposed originals, which I have in a box somewhere. Notice the steel tang that protrudes at the bottom of the mount and the heat shield (driver side only.)
The mount you have looks like a locking type mount and I do not believe the factory used them in either of our year cars. If it looks like the one you are replacing, it is entirely possible that one is not original to the car. Many years have passed and these big blocks eat rubber motor mounts.
The one that most vendors are saying is a non-locking type and does not appear to have the large steel tang that mine has. Really don't know what to tell you.
FR
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
The mounts are wider, but if you look close there are shims in the form of washers welded to the mount to narrow it to fit.....Either one will work for the applications...The device to prevent the engine from rocking over if the mount breaks.... I do not believe was ever OE except the fact many of the factory installed OE mounts were breaking....My 67 Camaro has cable restraints from the engine to the control arm because the breaking factor that was installed if the car was equipped with a L-78 engine......So GM recognized there was a problem......but maybe never acknowledged,
