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factory finish on motor mount hardware

Posted By: BTTG

factory finish on motor mount hardware - 01/10/11 10:27 PM

What is the correct factory finish on the nuts/bolts used to attach the motor to the K member through the engine mounts?

Thought it was black phosphate, but have seem some that appear to be zinc.

If it makes a difference talking about BB 1969.

Thanks
Posted By: jrwoodjoe

Re: factory finish on motor mount hardware - 01/10/11 11:20 PM

FWIW, The bolts that go through the motor mounts and K-frame that came out of my Oct. 1969 build 1970 318 Challenger had a sliver finish and were not black phosphate.

Joe
Posted By: FJ5_Fish

Re: factory finish on motor mount hardware - 01/10/11 11:32 PM

The Long "38" bolts are silver cad. The nuts can vary from silver cad or zinc phosohate. The washers are usually silver cad or silver zinc.
Not much on a Mopar is black phos.

Here is the original hardware on a 69 440. The silver cad has worn off of the treads on the short bolts but is still clearly evident on the head. Every car that Chrysler made had motor mount hardware (100's of thousands of bolts) so you can expect some vendor variance here and there.....I am just reporting what I have seen for years and what is on my original stuff.

Attached picture 6409428-m-mount-bkt.jpg
Posted By: jrwoodjoe

Re: factory finish on motor mount hardware - 01/10/11 11:53 PM

Actually, I thought someone put together a good list of finishes that was posted a while back. If a link isn't posted shortly I will ask in a separate post.
Posted By: 70gtx440dana

Re: factory finish on motor mount hardware - 01/11/11 01:27 AM

Quote:

What is the correct factory finish on the nuts/bolts used to attach the motor to the K member through the engine mounts?

Thought it was black phosphate, but have seem some that appear to be zinc.

If it makes a difference talking about BB 1969.

Thanks



I also need this info for my 70 Charger...I assume 69-70 will be the same.
Posted By: FJ5_Fish

Re: factory finish on motor mount hardware - 01/11/11 01:30 AM

70 is the same as the 69 pic I posted.
Posted By: goalsetterpk

Re: factory finish on motor mount hardware - 01/14/11 07:27 PM

Quote:

The Long "38" bolts are silver cad. The nuts can vary from silver cad or zinc phosohate. The washers are usually silver cad or silver zinc.
Not much on a Mopar is black phos.

Here is the original hardware on a 69 440. The silver cad has worn off of the treads on the short bolts but is still clearly evident on the head. Every car that Chrysler made had motor mount hardware (100's of thousands of bolts) so you can expect some vendor variance here and there.....I am just reporting what I have seen for years and what is on my original stuff.



Thanks for your pic, dumb question is that the correct way to orient the multiple bolts that attach to the motor block? I've seen them different ways not sure if that was mother mopar or not?
Posted By: FJ5_Fish

Re: factory finish on motor mount hardware - 01/14/11 09:52 PM

The FSM (factory service manual) and the engineering show the proper way to install the bolts, nuts and washers......hopefully I did it right in that photo.....
Posted By: hemi70se

Re: factory finish on motor mount hardware - 01/14/11 09:59 PM

IIRC there is only 1 washer per bolt/nut combo and I would say it goes alongside each nut.
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