Water Pump

[BIG Sean]

Currently got a rattling/bearing type noise from front of engine - first thoughts were pump or fan - anyone else had similar? - done a search but nothing seems to be relevant other than one or two posts but no outcomes to posts after I assume resolving issues.

Was told at last service that viscous fan was always on indicating this could be the problem but does sound like pump to me - is there any way i can determine whether pump or fan?

How easy are either job to do? ie capable for a slightly less competant DIYer with a standard 1/2" socket set and rusty spanners

How expensive? Parts only and full monty fitted?

Anything else while in bits? - belt(s)? coolant change?

Car's a 1998 V6 280

 

[Dieselman]

Check the crank pulley as the vibration damper has a nasty habit of breaking up, also check teh drive belt tensioner pulley and bracket.

A stethoscope is a good tool to use when trying to detect a rattle or knock but you need to keep away from the belt and fan.

 

[BIG Sean]

Check the crank pulley as the vibration damper has a nasty habit of breaking up, also check teh drive belt tensioner pulley and bracket.

A stethoscope is a good tool to use when trying to detect a rattle or knock but you need to keep away from the belt and fan.

Just had a look - no way I'm even going to attempt it.

Looks like the back of the fan - don't know what it is called but it is loose and motion of the belt is causing it rock and roll making the noise - scary now i've seen it - I'll take a picture and point out the bit that is rattling

 

[Dieselman]

The viscous coupling. Not unheard of.

 

[BIG Sean]

How do I insert an image? on my PC now but only option is 'URL of image'
???

 

[Howard]

Sean

In your message, scroll down to 'Manage Attachments'

Click this ....

it will open a box ....

Click on 'Browse' next to Upload File from Computer

Find your picture on your PC and it will attach it, you may have to shrink the piccy if it is more than 150k...

Good luck

 

[Ian B Walker]

If you fancy a trip over to Kirkham I will have a quick gander at it for you and tell you how you can do it.

 

[GarethM]

Big Sean

I got mine replaced about 3 months ago. The major problem is getting the viscos fan off. I got the parts from Merc, the water pump is an exchange item so you get money back when you take your old one back ( about £60 from memory after money back ) and i did belt and pully at the same time. I paid a local mechanic £60 to do it - too him and another chap to get the fan off ( wouldnt fancy it myself ) - but after thats done its really very simple took him about 30-45 mins.

Mine sounded like a churning noise and it came and went if that helps - if you dont have astethescope ( who does ! ) then put a screwdriver blade on the pump and put your ear to the end - youll soon know if it is the pump !

Hope that helps ....

G

 

[BIG Sean]

If you fancy a trip over to Kirkham I will have a quick gander at it for you and tell you how you can do it.

Thanks Ian - after having a look it is too daunting a task - last time I tinkered it was a 1256cc Chevette [massive engine bay and tiny engine(simple too) - this is completely the opposite makes me wonder how it got in there in the first place!!!!!]

Could you please price

• the pump/viscous coupling/coolant change

and

• check the ATF level - the clunky gearbox we talked about is getting worse

on a 1998 V6

I know you prefer the more mature mtor but I Assume this would be ok

 

[BIG Sean]

Bump and pics

picture of fan showing the part that is rattling

 

[GarethM]

Sean - The water pump sits directly behind that cover - If the bearings have gone then itll be making an awful noise. I think ( but dont risk your fingers until someone else confirms ) the chap that told me about mine stopped the fan from spinning ( with his hand ! ), enabling him to get a better idea it was definatly the pump.

 

[jaymanek]

Sean - The water pump sits directly behind that cover - If the bearings have gone then itll be making an awful noise. I think ( but dont risk your fingers until someone else confirms ) the chap that told me about mine stopped the fan from spinning ( with his hand ! ), enabling him to get a better idea it was definatly the pump.

use a carrot!

 

[Glenn Smith]

picture of fan showing the part that is rattling

Your water pump has gone.

 

[Dieselman]

Is everybody sure the water pump is behind the pulley on this engine. Usually the water pump is seperate on MB engines and this is just the fan pulley. Also I would expect the pump to be leaking with this much play.

 

[Ian B Walker]

Having the Chassis number of sean's car I can confirm that the water pump is behind the pulley.

 

[big x]

You can see the belt arrangement here and components behind in the video.

http://manuals.braingears.com/W210/w210/enginesm112_general.htm

adam