Hello

just bought an st170 this afternoon. i checked it out from top to bottom. ran perfectly well and heaters and everything worked.

got about 25miles down the road and the oil temp started to climb, closely followed by the water temp.

got it pulled into the services a mile later.

water absolutley pissing out. it seems to be coming from the back drivers side of the engine. as far away from view or access. is the water pump located here?

feeling about under a wet car on a wet road i think i could feel a hose that has a metal 90 degree fitting that goes into this area, just above the plastic cover. the fitting felt pretty crusty so i'm hoping its this and not a water pump or worse still a cracked block.


does anybody have any experience with this engine or problem from an st170?

 

They always, always leak from the thermostat housing. There's a bung in the bottom of it and the seal doesn't seal properly, so chances are it'll be leaking from there too. Just hope it hasn't pissed all the coolant out and you've done more damage

 

think the thermostat housig is on the gearbox side.

its pissin out from the belt side so i'm hoping its the hose

if not i reckon its the pump

 

hi there
did you find the cause of the leak?
i have a similar problem were coolant is leaking but the temp gauges are stable
cheers

 

It was the oil cooler sandwhich plate on mine.

very pesky to find and expensive 2!

think it was over 200 quid for the part and ford are the only suppliers.

you can just see the pin holes on the old one.

 

Thats odd, surely it would leak oil from there and not coolant?

 

nahh mate, the st170's have a water cooled oil cooler

silly idea in my opinion, good chance of serious damage if that bit goes pete tong

ran it for a while with out it, absolutely no difference!

 

i picked a 54 plate up in feb , got it home and next day there was a puddle of coolant underneath , turns out the bung on thermostat housing was passing water
not a bad fix ,£7.00 from ford for new aluminiun bung and a new " o " ring , the new " o " is 1mm bigger in diameter than the old one
makes you wonder if ford slipped up on design , you hear so many stories about this

 

hi again
after further investigation i think i have found the cause of the problem.
it is just to the right of the oil filler cap and to the right hand side of the engine. it seems to be leaking from underneath, a alliminium bung of some sort.
does anybody know what this could be?
cheers

 

its the bung in the bottom of te thermostat housing.

see the post above yours for a fix mate.

 

Yeah its the thermostat housing, very very common to leak from there. You can buy a new bung for a couple of quid from ford.

 

ok cheers guys.
is it easily repaired?
the reason i ask is because it lookes round so cant get a spanner or allen key on it
or does it just unscrew?
cheers

 

Pretty sure it just pulls out, cant remember though was ages ago when I did mine. Get a new plug from ford first and you'll see how it fits

 

get a pair pliers pull the clip towards you then the bung will drop out .you ,l get a new clip aswell for £7.00 from fords as above .10 min job