water pump help

ben_93

Hi all, I am new to this site, and I am an apprentice mechanic, and a mate has a saab 93 2.0 turbo 170bhp model, which i believe is the same engine as the 2.0 turbo vectra c (z20net), anyway I believe the water pump has gone, as the water is not flowing through the system properly , and it seems to be pressuring too much, as the valve in the header tank cap is letting water out of the overflow, i have swapped it for another cap and it is still the same..
I spoke with a saab specialist and they said the impeller on the water pump is well known to fail, I am basically wondering where the water pump is located, is it timing chain driven or is it aux belt driven? i have had the engine mount off and had a quick look but failed to notice a water pump? so I was wondering if it is driven by the chain? any help or tips would be great cheers! 😃

MikeS

that engine get superhot at idle

the discolouration at the bottom of the expansion tank as a result of heat from the turbo / manifold says a lot

http://en.wikipedia.org/wiki/File:Gm_ec ... saab93.jpg

z22se water pump is chain driven and is down the back of head

on z20net there is a wiring harness hooked up to the rear of the head for rear lambda & exhaust gas temperature sensor - directly below that is where the water pump is for z22se - a big pipe then goes along the block to the other end where the stat housing is

Matt

hi its driven by the cam belt take the cover off and you will see the water pump hope this helps

ATOM_X

fatboy1 said:
hi its driven by the cam belt take the cover off and you will see the water pump hope this helps

Totally Incorrect
it is AS Mike S states

MikeS

i am feeling faint

ben_93

Thanks for the help! 🙂

MikeS said:
that engine get superhot at idle

the discolouration at the bottom of the expansion tank as a result of heat from the turbo / manifold says a lot

http://en.wikipedia.org/wiki/File:Gm_ec ... saab93.jpg

z22se water pump is chain driven and is down the back of head

on z20net there is a wiring harness hooked up to the rear of the head for rear lambda & exhaust gas temperature sensor - directly below that is where the water pump is for z22se - a big pipe then goes along the block to the other end where the stat housing is

Cheers for the info mate, that has helped allot, so the timing chain cover will have to come off to acsess the pump? any specialist tools required for this job or is it pretty stright forward?

MikeS

yes either chain off or a tool to hold the chain in place

it is a pain of a job

either manifold or driveshaft has to be dropped