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  #1  
Old 01-20-2007, 10:09 PM
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What else should I replace with the water pump? (86 190 2.3)

I believe that I have a bad water pump on my 86 190 2.3. What else should I replace when I replace the water pump? Belt & tensioner?

I'm also planning on doing the valve stem seals on the same car. Same question, what else should I replace at that time?

The car has about 130k.

Thanks,
Brian

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  #2  
Old 01-21-2007, 12:09 AM
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Timing belt? I think it has a timing chain?

At any rate, yes, I would change all of that while you are in there if you do not know when it was last changed/never changed.
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  #3  
Old 01-21-2007, 02:25 AM
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Ah, I was thinking about the serpentine belt...But if the timing chain is easier to do at that point I don't see why it couldn't be done.
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Old 01-21-2007, 09:01 AM
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Folks don't typically replace the timing chain when they do the water pump. But I suppose you could. If it's like the M103 (2.6, 3.0), the chain is very long lasting.
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  #5  
Old 01-21-2007, 12:03 PM
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Change thermostat and flush cooling system (if not done recently). If MB Coolant is used, you are good for 3 yrs. until your next coolant flush.
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  #6  
Old 01-21-2007, 03:08 PM
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change only whats broken, as the saying goes, don't fix it if its not broken or you'll be asking for trouble, I've been working on Mercedes benz as a collector for 18 years now, and have learned my lesson the expensive way.

just do the oeriodic preventive maintenance and your good with it.
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  #7  
Old 01-21-2007, 07:33 PM
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Quote:
Originally Posted by pmpski_1 View Post
I believe that I have a bad water pump on my 86 190 2.3. What else should I replace when I replace the water pump? Belt & tensioner?

I'm also planning on doing the valve stem seals on the same car. Same question, what else should I replace at that time?

The car has about 130k.

Thanks,
Brian
Make sure you change the short hose from the top of the water pump to the thermostat housing.

Dave
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  #8  
Old 01-21-2007, 10:36 PM
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waterpump

Listen to the last post by Cool. I have just gotten myself into a hell of a mess by fixing something that did not need fixing. Leave well enough alone. Change the short hose, theromostat, serpentine belt, if needed, and add new fluid.

Antonino
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  #9  
Old 01-22-2007, 01:50 AM
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Sounds good. I really don't even want to do this work, so I have no problem with staying focused on what needs to be changed
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  #10  
Old 02-26-2007, 05:00 PM
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What makes you think the water pump is bad? Isn't the metal impellor fixed to the shaft?

Dan
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  #11  
Old 02-26-2007, 08:15 PM
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Quote:
Originally Posted by slk230red View Post
Make sure you change the short hose from the top of the water pump to the thermostat housing.

Dave
Does this short hose tend to leak? My car is in the shop right now and I'm hoping it is just a leak at this point. I've changed the other two hoses and am praying its not the water pump. I just found out about this little return hose. You can't (or its hard) to see it.

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