Hey guys, I need help. I have a Land Rover LR2 2008, about a week ago I discovered sludge in the water. Although I did not find the reason for the sludge, I changed the oil collar, maybe there was some deformation there. Traveled with the car for about 3 days, everything is good. Yesterday, I felt vibrations, at about 40 mph. I made a turn, came back home. Today when I wanted to take the car to the garage, the engine does not stabilize and it goes up and down after driving. I don't have any lights that come on. I don't know which problem to attack first.
I have a video but can't upload it here ...

I'm in Mexico, I don't have quality garages, I need your wisdom.

 

Drain the coolant and examine it. If there is oil floating in it, you have a serious problem with your engine, like a head gasket that has failed. Don't drive the car like that. The motor is a Volvo engine, same as the Volvo S80. See if you can find a shop that works on Volvos and they will surely recognize it.