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Old 04-03-2000, 07:32 PM
Registered User
Join Date: Dec 1999
Location: Utrecht, the Netherlands
Posts: 359
The waterpump of my 300SE (103 engine) has some radial play.
With the belt removed I can move the pulley a little bit from side to side.
Is this normal for this engine? The pump is not leaking.
If this is a sign of breaking down I would like to fix it before I take a much needed holiday trip to the south. I already ordered the snap-on tool.
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Old 04-03-2000, 07:50 PM
Registered User
Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
Don't wait. I paid the ultimate price for a failed water pump (overheat and blown head gasket) Get your tool, get a new pump and fix it ASAP.
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Old 04-03-2000, 09:08 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
Use only a factory pump. I have seen the aftermarket pumps fail quickly with much damage...and the core is no good.

If you aren't a tech, take it to one for this. If you are, have fun... This is a good job. Book time is 4.8 hours. I can do it right in under 1.5.

Donnie Drummonds
1981 280GE SWB
1987 16V
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Old 04-04-2000, 07:24 PM
Registered User
Join Date: Dec 1999
Location: Utrecht, the Netherlands
Posts: 359
Thanks for your reply's, I will replace the waterpump as soon as possible.
I already planned to do so, but wanted your confirmation. I know how to wrench, but lack your experience and I don's want to replace something that is ok.
Last summer I did some work on the engine, valve guides, timing chain and rails and piston rings. I put a lot of work and sweat (even in the Netherlands it can be hot) in this car and now it runs great. I want to keep it this way.
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Old 04-05-2000, 04:56 PM
Registered User
Join Date: Mar 2000
Location: Outside Indianapolis, IN
Posts: 214
Get the Snap-on FLXM13 (1ft or so 3/8 drive extension with a ball type universal joint/ 13mm socket on one end, very compact head) that Benzmac recommends. I had to chase down a Snap-on guy to get it. (I haven't received the bill yet, he said about $35). It decreased the job to 2-1/2 to 3 hours total for me. Benzmac said he can do it without removing the tensioner or power steering pump bolts, but I couldn't get it to clear the upper tensioner adjuster bracket without loosening the power steering pump bracket and tilting it out. I'm not sure if the tensioner really needed to be removed (I removed it first, no help) The tool does make it so the a/c compressor bolts can be left in place and all work done from the top)

Bob Johnston
87 300E
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