Hello,
First of all, I am totally not a DIY type person. Some how I did replace waterpump on my 1990 190E 2.6 5-speed (175K), thought, will share the experience with you.
I own a 1994 E320, I saw the 190E and 320E are pretty similar in how the water pump is configured/attached. The same procedure and be applicable to E320, 300E.
While doing the job, I learned how to replace
1. thermostat
2. drive belt
3. thermoviscous fan clutch
4. belt tensioner and many more.
I took it as a challenge, one step at a time, took several days, no stress, did small progress each day after coming home from work. The dealer wanted $280 for the water pump, I did not dare to ask the labor charge. Local Mechanic quote $800 for the labor.
Bought water pump from Autohouse Arizona for $140. couple of months back I had a mechanic replace my bearing bracket and thermoviscous fan clutch. I saw the entire process, thought that wasn't too hard. So I went for it.
After reading several post, I got some idea how to proceed.
1. disconnect battery
2. Remove fan shrouder,
3. remove 6 screws that holds engine hood above the radiaor.
3a. remove radiator
4. remove fan blades
5. loosen bolts that hold waterpump pully and powersteering pully
6. Loosen belt by turning belt tensioner screw to the left and remove belt. draw a figure how the belt was configured. This is very important, otherwise you will forget while putting it back.
7. remove air filter housing.
7. open bolts that holds power steering and put powersteering to the right as afar as possible.
8. open bolts that holds belts tensioner.
9. remove thermostat housing and thermostat
10. also loosen a small 5mm hex bolt behind fan clutch (sorry I dont know it's name) that hold a horizontal metal pipe entering into water pump.
11. open 4 bolts that holds water pump. front 2 screws are relatively easy. rear 2 screws are extremely dificult. You will need a universal joint, an extension to reach the rear lower bolt. Rear upper bolt is "B" gave me real hard time. I bought a special wrench from sears that open any bolt as little as 5 degree movement. I removed the bolt that holds engine oil checking dip stick.
12. remove water pump and put everything in reverse order.
I am sorry, I did not take any pic, I was not sure wheather I will be able to do the job. At onetime I thought I have to call tow company and throw away my car to junkyard.
No more water leaking in initial test run. God really helped me though this job. I am very happy with all the money I saved and started loving my car more.
I recommend to the replace the following that at the same time if they are worn out. It will eventually save time and effort to do the same job again and again.
thermostat,drive belt, thermoviscous fan clutch, belt tensioner and belt. Also check all the pullys that are connected by the drive belt, bearing of these pullys wear out with high millage.
Hello,
First of all, I am totally not a DIY type person. Some how I did replace waterpump on my 1990 190E 2.6 5-speed (175K), thought, will share the experience with you.
I own a 1994 E320, I saw the 190E and 320E are pretty similar in how the water pump is configured/attached. The same procedure and be applicable to E320, 300E.
While doing the job, I learned how to replace
1. thermostat
2. drive belt
3. thermoviscous fan clutch
4. belt tensioner and many more.
I took it as a challenge, one step at a time, took several days, no stress, did small progress each day after coming home from work. The dealer wanted $280 for the water pump, I did not dare to ask the labor charge. Local Mechanic quote $800 for the labor.
Bought water pump from Autohouse Arizona for $140. couple of months back I had a mechanic replace my bearing bracket and thermoviscous fan clutch. I saw the entire process, thought that wasn't too hard. So I went for it.
After reading several post, I got some idea how to proceed.
1. disconnect battery
2. Remove fan shrouder,
3. remove 6 screws that holds engine hood above the radiaor.
3a. remove radiator
4. remove fan blades
5. loosen bolts that hold waterpump pully and powersteering pully
6. Loosen belt by turning belt tensioner screw to the left and remove belt. draw a figure how the belt was configured. This is very important, otherwise you will forget while putting it back.
7. remove air filter housing.
7. open bolts that holds power steering and put powersteering to the right as afar as possible.
8. open bolts that holds belts tensioner.
9. remove thermostat housing and thermostat
10. also loosen a small 5mm hex bolt behind fan clutch (sorry I dont know it's name) that hold a horizontal metal pipe entering into water pump.
11. open 4 bolts that holds water pump. front 2 screws are relatively easy. rear 2 screws are extremely dificult. You will need a universal joint, an extension to reach the rear lower bolt. Rear upper bolt is "B" gave me real hard time. I bought a special wrench from sears that open any bolt as little as 5 degree movement. I removed the bolt that holds engine oil checking dip stick.
12. remove water pump and put everything in reverse order.
I am sorry, I did not take any pic, I was not sure wheather I will be able to do the job. At onetime I thought I have to call tow company and throw away my car to junkyard.
No more water leaking in initial test run. God really helped me though this job. I am very happy with all the money I saved and started loving my car more.
I recommend to the replace the following that at the same time if they are worn out. It will eventually save time and effort to do the same job again and again.
thermostat,drive belt, thermoviscous fan clutch, belt tensioner and belt. Also check all the pullys that are connected by the drive belt, bearing of these pullys wear out with high millage.
Thanks.
Congratulations on tackling a not so simple job. Your approach - being methodical - paid off. Its amazing what you can accomplish with patience and time. You're on the road to saving big money on maintenance and probably keeping your cars longer than you would have. One step I didn't see in your process, is to raise the hood to a vertical position so you don't always hit your head on the grill. Do you know how to do this? Also, as time goes by you will learn tricks to cut time and effort. For example, its not difficult to do the same job with the radiator in the car. But you did the right thing - making sure you didn't damage it as you were feeling your way through the job for the first time ! Another point to consider; did you price the water pump from Mercedes Benz? My experience is they are cheaper than auto parts stores and their parts are superior in quality.
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