The day we were leaving for our Ouray, CO trip as I was backing the Jeep out of the garage to hook up to the coach I noted a small drip on the garage floor. It's location was a bit odd as it was just inboard of the passenger's side front tire and was dark in color. After feeling it I thought it seemed like glycol but had some oil characteristics as well. A quick look underneath and I noted a small drip hanging off the front lower control arm so after grabbing the creeper and crawling around under the Jeep for a few minutes I detected a slight drip or residual fluid on the passenger's side motor mount. I figured I had a motor mount beginning to leak but it didn't appear to be bottomed out of sagging, yet, so off to Colorado we went. That was in the back of my mind the entire trip and I checked on it daily but it didn't leak any additional while we were on vacation and never gave me any trouble. While on vacation I had ordered a pair of motor mounts so they'd be there when we arrived home but I haven't had time to replace them until now.
Saturday morning I racked the Jeep and began motor mount replacement. The driver's side had much more room than the passenger's side mount. I removed the engine cover and verified the clearance between the valve covers and the firewall so I knew how much I could raise the engine without any issues. Unfortunately, I had to remove the driver's side as well as the engine had to be raised evenly and then shifted slightly to the driver's side once that mount was removed in order to gain enough clearance to remove the passenger's side. It was still tight but I was able to remove it once the engine was shifted.
Here you can see the fluid leaking from the passenger's side motor mount in the cradle. It didn't really leak much more after we arrived home from vacation but just kept some slightl residual fluid around the mount.
Passenger's side motor mount removed and on the bench. Here the leak was more evident.
This is what surprised me though. The driver's side had also failed but the failure was in the rubber encapsulation and it wasn't leaking.
New GM motor mounts actually came with heat shields so maybe they will help. The aftermarket ones I originally installed didn't come with heat shields and they are quite close to the exhaust manifolds so maybe that was a factor.
New motor mounts swapped over onto the brackets and ready for reassembly.
Motor mounts installed and fasteners tightened. The heat shields are in place and not contacting anything.
All of the fasteners are treated to a quick reference of Seal Check and/or a paint pen so I can notice if a fastener ever comes loose.
After a quick road test last night, it feels like a successful replacement and the Jeep is ready to tackle the highway and dirt roads again.
Thanks for looking.