When a water pump begins to fail, you'll notice that the car tends to overheat at low engine speed, such as sitting at a stoplight. When you accelerate, the engine temperature will drop. Now, this is not always indicative of a water pump, but a good starting point. You may also want to try squeezing the top radiator hose with the engine warmed up and running. You should feel pressure build up on the back of the hose and surge once it is released. If you feel no pressure, it's a fair bet that the water pump is failing. Sometimes, you can also see a slight drip coming from the water pump housing itself. These weep holes are cast into the pump housing and allow excess coolant to drain out if it has leaked past the various seals in the pump.
In this article, I'll go over the steps involved with changing out the water pump on the Mercedes Benz M104 engine. This job is a bit difficult, with many steps and a few things that are easy to overlook. I've tried to compile as much of it as I can here so that you won't be making any mistakes in the process.
Read the Full Article: [ Ссылка ]
Time: 7 hours
Tab: $200
Tools: Set of Allen head sockets :[ Ссылка ], wrenches :[ Ссылка ], screwdrivers :[ Ссылка ]
Applicable Models: Mercedes-Benz E320 (1996-97) :[ Ссылка ]
Parts Required: Water pump :[ Ссылка ], hoses :[ Ссылка ]
Hot Tip: Take your time. This one is a bit daunting
Performance Gain: Car will cool down again
Complementary Modification: Change serpentine belt, radiator hoses.
