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Here’s a detailed video showing you how to make polyurethane engine and transmission mounts from liquid polyurethane.
The advantages of doing this as opposed to buying ready made aftermarket polyurethane engine mounts are that this method is much cheaper (25 USD for 4 mounts vs. 160 USD for 2 mounts in the case of my car).
The advantages of polyurethane engine (especially torque mounts) are improved responsiveness, no need to replace the mounts ever again, reduced wheel hop and preventing horsepower lost on moving the engine back and forth.
The video shows a detailed procedure, from removing the old mount inserts, burning out the rubber, and pouring in new liquid polyurethane. The product I used is reoflex 60 from smooth-on. There are many others out there however, this is just what was available to me and in the right shore hardness.
The additional benefit of DIY mounts is the fact that you can customize the shore hardness of the mounts to make it best suited to your particular application. I have selected 60A shore hardness which is a nice compromise between the 80A shore hardness stuff which is more suited to track day cars and the 40A shore hardness stock rubber.
The important thing is to ensure the pins inside the mounts are fitted in the same position as stock and they must be positioned to stand flat for the liquid polyurethane to cure properly. Think in advance about where the polyurethane will be drying as this is where the engine mounts will be sitting for anywhere between 16-48 hours depending on the tempereture and liquid polyurethane product/brand.
Check out my blog for more MR2 mk1, 4AGE, DIY and more fun car stuff:
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remove all amimals from the room
fire up a barbie and let it burn them out !
if its too stiff you could drill a few holes through the poly.
buenas tardes, disculpe esas resinas conque nombre las consigo en mexico?
buenas tardes, en mexico conque nombre reconosen el nombre de las recinas?
Try a rubber longboard skateboard wheel???
Melt to fit if needed???add another wheel also if needed??.
How long will yours last in this video?
Hapco sell a wide variety of castable urethanes and are pleasant to deal with.
use a plastic disc on the cardboard. There's fuck all that really sticks to plastic . I wonder if you poured the voids in the rubber with wax and then press out the wax plug. Would the heat of polyurethane curing melt the wax or could it mould the voids for us ?
Hi saw your polyurethane bushing is that good for transmission supports as well? Another thing , can you send me a video how to cut a original coil springs for a Honda City 1998? I bought a hard gas shocks ( Nitro tech – korean made) front and rear and I want to counter the hardness a bit by using an original OEM springs and cut it just a little to leave a 1 finger drop in the front and 2 at the back…. They were sayng I need to "torno" the tips from where I will cut the springs so it doesn't destroy the shock mounts and bearing. Can you teach me how so I can DIY – Do It Myself and achieve a good drop. Thanks and more power to your videos … VERY HELPFUL and you are EASY to Understand friend…. hope you can get back at me pls pm me a message and the videos thanks again !!!!! Jason Espejo of Marikina , Philippines …