Water pump

[tessie]

Hi guys
What would be the signs of a failed or failing water pump in a 940? Also, do you need to remove the rad to change the pump (haynes says yes, but just wondered since I've not long replaced the rad and coolant)?

[david philips]

signs are loss of coolant if you feel the botom of the pump after useing the car if its wet then chances are pump needs replaced.

[rogerthechorister]

You are also likely to see a snailtrail of limescale or similar deposit down the side of the block from the waterpump.

Longnose 7s you definitely do not have to remove the rad - dismantle the vicious fan (punintended) in situ. What the situation is on electric fan cars I'm not sure.

All the water pumps are horrid to get snugged up with all seals correctly placed and watertight after installation.

[wooble]

Water pump replacement signs are either obvious water leaks, or if there is any slop/play in the water pump pulley (grab the fan and give it a rock if it's got one).

You don't NEED to remove the radiator, but seeing as you'll be draining the coolant anyway, you may as well, it makes access easier.

Fitting the pump isn't as bad as some make out - there are two slotted holes on the pump body, fit these loosely first and the lever the pump firmly upwards against the cylinder head before tightening to make sure the top seal doesn't leak.

[rogerthechorister]

And make sure the little rubber O ring does not move while doing it, oh and then there's the little pipe from the back of it too...

[roadcar2000]

Reccomend that after changeing the pump first fill the system with just water to check for leaks. Dont waste anti freeze that way if there is a leak

[tessie]

Hi folks thanks for all the advice on this thread, and bearing all that in mind I was convinced that the water pump needed replaced and I purchased a new water pump to put on.
Thing is, not long after my initial post the (apparent) coolant leak (which had been enough to leave a smallish damp/wet patch, not a puddle as such, under the car), ceased (yahoo, thinks me) but then seemed to be replaced by a slight oil leak around the same area (but nothing major).
However, this morning noticed another similar patch under the car and on eamination it looks like a leakage of what seems to be a thin oil (ie thinnner than engine oil). I wondered whether this could be a combination of coolant and engine oil (although the leakage looks to be clean and not emusified or anything like that) or maybe just a case of escaping coolant washing up the oily crud that I should be ashamed to admit lies in certain parts of the engine bay!
I would be very grateful for the comments of those who are vastly more knowledgable than myself before I go any further.
Cheers

[tessie]

Some photos at facebook to try to show the leak.


https://www.facebook.com/photo.php?f...type=3&theater

https://www.facebook.com/photo.php?f...type=3&theater


https://www.facebook.com/photo.php?f...type=3&theater

[lnparry]

Hi Tessie,

Looks like it could be an oil leak from the front camshaft seal or possibly the rocker box gasket. My 940 leaks from the camshaft seal and the oil does look pretty thin to.

Have you checked the crankcase breathing system (PSV?). If that is partially blocked it can lead to oil leaks.

Cheers,

LeeP

[Steve940estate]

As above I was going to suggest the front cam seal.
If you remove the top cam belt cover you might be able to see where the oil is coming from.