95 Impreza - clanking noise at certain speeds

[Remco]

Hi all

My daughter's impreza started making a clanking/screetching noise at
certain speeds and startup. Initially I though that perhaps one of the
heatshields came loose again, but that was not the case.

I did notice a drop or two of antifreeze around the pump area so I am
assuming it is on its way out. When a subaru pump starts fails, do they
make noise like that? (first I've heard that on a pump)

I've never had to replace a water pump on an impreza. Is it anything
special? There seems to be a cover over the pump - is that part of the
timing belt cover?
Just loosen the alternator belt, loosen pump and put the new one in,
right?

Tia
Remco

 

[Edward Hayes]

If it's like my 2000 Forester 2.5L engine then it is alittle more
complicated than just removing a belt. Mine is driven by the timing
belt so the timing belt covers must come off and the belt tensioner
removed to get the water pump. The tensioner must be then reset by
mounting it in the vertical position and SLOWLY compressing it. I
suggest you go to www.endwrench.com to see if there is a file on
waterpump replacement.

 

[Gilles Gour]

The water pump is powered by the back of the timing belt, so you have to
remove the covers (three parts)and remove the belt (and replace it if
it's near replacement mileage). You usually, at the same time, replace
the oil pump O ring, check the tighness of the oil pump back plate
screws (tighten with Locktite) and reseal the oil pump to the engine
block. You also replace the crank and cam oil seals, and check all idler
pulleys and the tensionner. A Hayne's manual should help you thru the
details.

 

[Remco]

The water pump is powered by the back of the timing belt, so you have to
remove the covers (three parts)and remove the belt (and replace it if
it's near replacement mileage). You usually, at the same time, replace
the oil pump O ring, check the tighness of the oil pump back plate
screws (tighten with Locktite) and reseal the oil pump to the engine
block. You also replace the crank and cam oil seals, and check all idler
pulleys and the tensionner. A Hayne's manual should help you thru the
details.

Thanks! (the other poster Ed too)

I've never heard a water pump making metallic clanking noises - it
certainly seems to come from that area. Is that a common thing these
water pumps do?