I am replacing the crankshaft seal on this car. I noticed the front motor mount is busted, so I ordered the set from RockAuto to replaced them all while they were easy to get to. No OEM Honda mounts parts are left, so aftermarket is the only choice. The issue is the rear solenoid-activated mount. The first one ordered does not engage under vacuum. Asked for a replacement, and the replacement is the same. Scanning eBay, I think all these aftermarkets were made in the same factory and are probably all nonfunctional. The original one has a lot of small cracks and the original inlet broke off when I pulled out the vacuum line and the vacuum hose won’t connect now.

What would the idle be like with the soleniod function not working on this car? Can I live with it if I just block that vacuum line?

 

The rear mount is actuated by a vacuum and changes the stiffness to help dampen vibrations at idle. You can plug the solenoid vacuum hose and see if you notice any engine vibrations at idle.