My water pump on my 92 400se has begun to leak from the “seep hole.” Since this my 1st attempt at replacing a water pump on a M119 engine, I was hoping others in the forum might have tips before I begin my venture.

I did a forum search and can't find information on water pump on a M119.

Below is the procedure outlined on the Alldata.com website for my model of car.

I have decided not to use any sealants on the “paper gasket” that accompany the water pump.

I looked into the engine bay tonight and the water pump looks fairly easy to access on the W140 body. But after reviewing the “Preparation” steps below .. Geeze.. do I need to remove the -Viscous fan clutch carrier removed and Harmonic balancer and drive belt removed. Before removing the water pump?

I sure hope not!

AllData Procedure
Preparation
• Viscous fan clutch carrier removed. See: Fan Clutch\Service and Repair
• Harmonic balancer and drive belt removed. See: Engine
Removal and Installation
• Detach coolant hoses (4), (5) and (6), attach.
• Unbolt connection cover at top (2) with engine lifting eye (1), bolt on Tighten to: 21 Nm.
• Replace gasket (2a).
• Model 210 With Secondary Air Injection: unbolt retaining plate with switchover valve for secondary air injection at coolant pump (3), bolt on.
• Unbolt coolant pump (3).
• Clean sealing surfaces.
• Replace gasket (3a).
• Install coolant pump (3) on, bolt on. Tighten to: 21 Nm.
Pay attention to different bolt lengths, see bolt diagram illustration above.
• Check cooling system for leaks. See: Testing and Inspection
• Tighten the bolts of cover at top to coolant pump to: 21 Nm

Attached Thumbnails

 

__________________
Russell McMahon
Tulsa, OK
2001 CLK 320
1992 400se
1993 400e
2000 320ML