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67 bonneville 400 motor mount question

  
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67 bonneville 400 motor mount question

 
jaredstewart85 jaredstewart85
New User | Posts: 1 | Joined: 05/13
Posted: 05/20/13
08:15 PM

i've been searching for a forum to ask a question about my 67 bonneville project.  Im getting ready to set the motor in it which is a 400 which i think is a 76 or 75 year block, it had more that two mount holes on each side.   local parts store got me motor mount that they said were the right ones and still do say they should work.  problem is they are identical mounts, no left or right side and the right side bolts up to the block just fine but the left side wont clear the mounting hole that is above the bottom ones and also it appears that this would also set the engine crooked if it was to bolt up to the motor...   any suggestions as to what i'm missing here.    Any help will be appreciated.  

70bird 70bird
Guru | Posts: 1064 | Joined: 02/13
Posted: 05/21/13
08:09 AM

Hello


I see you are a new member, welcome. Sorry I have no clue but assure someone will help you soon. I'll check it put also until then.

Are your mounts reversable? Are the bottom bolt holes in the mounts centered between the upper holes.

Are the mounting holes in the block further forward on one side or the other [staggered]?

Do the metal mounts on the body unbolt? You may need a different one.

What do you mean by "won't clear the mounting hole?"

EXACTLY what application are the mounts you bought for ie year and model etc.?

What motor was in the car?  

70bird 70bird
Guru | Posts: 1064 | Joined: 02/13
Posted: 05/21/13
08:42 AM

Hello

It looks like you have the wrong rubber mounts, buy the ones in the pictures in the links below that do NOT look like the ones you have. It is a small possibility you might need one of each, you need to judge for yourself.

Symmetrical “center” mount

http://www.opgi.com/grand-prix/1967/chassis-suspension/bushings-mounts/GBC2902/


Asymetrical ‘offset” mounts

http://www.opgi.com/grand-prix/1967/chassis-suspension/bushings-mounts/GBC2903/  

ROWSLEY ROWSLEY
Guru | Posts: 981 | Joined: 07/11
Posted: 05/21/13
08:56 AM

does the mount have a treaded hole going up from the bottom of the car or a long bolt going through from the front of the car? far as i know most pontiac mounts work for left and right side.

hang on i will check. parts guy said they are the same and they should bolt up from the bottom through the frame.  you never know about this made in china crap these days!!  
76 455/4spd TRANS AM
69 GRAND PRIX 455/5SPD

70bird 70bird
Guru | Posts: 1064 | Joined: 02/13
Posted: 05/21/13
09:55 AM

Hello Rowsley

OPGI Says there are 2 different types of rubber mounts with a threaded hole in the bottom for 64 thru whatever bonnies. I posted them above but we'll see what he says, maybe there's three kinds.  

waynep712222 waynep712222
Enthusiast | Posts: 310 | Joined: 03/13
Posted: 05/21/13
02:24 PM

65 70 Pontiacfullsizemounts Zps43ce3e0a


76 Pontiac Fullsize Motormounts Zpsd0acefe0



C269514 Zps2aabf91c

these are available from sources..  allow the late model motors to be installed against earlier mounts..  

ROWSLEY ROWSLEY
Guru | Posts: 981 | Joined: 07/11
Posted: 05/21/13
11:05 PM

wayne # 3 looks just like what i have on my 69 grand prix.

the adapters are also to mount early 2 bolt blocks in late moldel cars. i have heard that some of the late blocks only have 3 holes instead of 5 motor mount bolt holes.

the adapters will also mount a pontiac motor in a 76 chevy blazer 4x4. makes for a fun mud buggy!  
76 455/4spd TRANS AM
69 GRAND PRIX 455/5SPD