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

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.

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.

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.

__________________
2012 E350
2006 Callaway SC560

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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ARVY

1999 E430
1999 C230 Kompressor
1992 300E (write-off)
1984 190D 2.2 (sold)

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.

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

Dave

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

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

What makes you think the water pump is bad? Isn't the metal impellor fixed to the shaft?

Dan

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81 240D 4speed with 300D engine
87 560SL
2005 E320
Yukon Denali
Sierra Denali
850 Turbo Volvo
1996 Mustang
1984 Mustang race car
3 Boats

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.

__________________
Rob Armstrong, Charlotte, NC
Mountain Island Lake
RobAinCLTNC@hotmail.com

2004 VW Passat GLS TDI-50k
2006 Honda Odyssey EX-L 7k
FOR SALE 1991 300TE 228k

2003 Subaru Outback 57k Silver/Black-SOLD
2005 C230K 18k Pewter/Grey-SOLD
1997 E420 108k Black/Grey-SOLD
1986 560sl 200k Black/Palimino-SOLD
1985 300sd 340k-SOLD
1979 240d 170k-SOLD
2000 Volvo V70XC-POS couldn't sell fast enough