1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Engine and Transmission Mounts

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Old 08-06-14, 10:42 AM
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Hello World

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NC Engine and Transmission Mounts

Crew,

I have (still) a 1985 12a S, all stock. I was thinking of replacing the 29YO engine and transmission mounts. Seems mostly straightforward - assuming the car is on four ramps and I'm using the floor jack to -slightly- lift the engine to get at the mounts. So, my question....any recommendations on mounts? I guess I had not given a lot of thought the variety that seems to be available. Stock? Racing? Stiff? etc.? I was thinking it best to do both engine mounts and the transmission mount at the same time (as in the same under-the-car session).

Anything I should be on the lookout for? Any gotcha's to be aware of? And again, any recommendations on which mounts to use?

As always, thanks for your insight and wisdom!
Old 08-06-14, 11:59 AM
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I guess I would go for something else unless the stuff is actually deteriorated. I just took my '83 tranny off while swapping engines and the rubber was not "like new" but it still seemed like it was doing its job well. I didn't look at my engine mounts when I swapped because I kept the same face plate on the new engine and never even took the rubber bit of the mount off. I noticed no harsh vibrations that I would associate with bad mounts.

If mine were shitty I would have gone with these,
Engine Mounts/Bracing - Early Rotary & 1979-85 Mazda RX-7
But really if I was going to be replacing rubber bits to make my car drive smoother I would start with the suspension, not the engine.
Old 08-06-14, 12:54 PM
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Waffles - hmmm good

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Hockey pucks drilled out make great engine mount rubber replacements. Stiffer than stock tho.
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