Cold weather.

[dlknight]

ORIGINAL: 944Turbo

Other coolant leaks can be hard to spot, do you have the hard pipe that runs above the exhaust manifold this sometimes goes to pinholes which spray onto the manifold and the coolant evaporates almost immediately.
Tony

Sorry to tag on [8|]

I've had a small coolant leak that appears to be coming from where the hard pipe joins the small rubber hose that joins the water pump, the small rubber hose has been replaced twice and I had recently tightened the jubilee clip with a spanner. This seemed to solve it for a week but then it started again, can clearly see the spray residue around the hard pipe area. I use my car as a daily driver and the leak isn't that bad (about a litre a month).

Has anyone else had a problem with coolant leakage from the hard pipe above the manifold? Is it worth replacing it?

Dave K.

 

[Mike_Pollock]

Yes - they are a known for leaking - its a 20 year old steel pipe with warm water in it!
Mike

 

[Hilux]

If I fill the header tank of my S2 to the 'Max' mark, it will push the water out to just about the 'Min' mark, and then stop. It always has done it, and seems fine.

It shouldnt do. I`ve never heard of this as normal in these cars. The system is designed to work within parameters that allow for water loss and expansion.

You have an airlock, thermostat or head gasket issue as its obviously pressure filling the reservoir to overflow, stabilises to the absolute max when driving and then drops when not under pressure to the min mark but what drop! Thats a lot of fluid that is expanding/contracting for some reason. In a car functioning normally under load the fluid wont move.

 

[the_dr38]

No infact today I spent a bit of time with the bonnet open and managed to find the leak. There is a hose which connects onto a screw fitting above the top hose, it's a lot smaller, the screw is hollow and allows water to pass through. It was this which was leaking and as soon as I touched it, the screw broke, leaving practically all of the thread still in the socket and therefore no connection. Managed to get the thread out so hopefully I can get a new one from Porsche on Monday and use the car again because at present, it's now left 20 miles away at my fathers house.

I wonder whether this leak could be anything to do with the fan staying on? Once again I'm driving with the fuse out.

Regards

Lloyd

 

[zcacogp]

ORIGINAL: Hilux

If I fill the header tank of my S2 to the 'Max' mark, it will push the water out to just about the 'Min' mark, and then stop. It always has done it, and seems fine.

It shouldnt do. I`ve never heard of this as normal in these cars. The system is designed to work within parameters that allow for water loss and expansion.

You have an airlock, thermostat or head gasket issue as its obviously pressure filling the reservoir to overflow, stabilises to the absolute max when driving and then drops when not under pressure to the min mark but what drop! Thats a lot of fluid that is expanding/contracting for some reason. In a car functioning normally under load the fluid wont move.

Interesting. Thanks.

It's always done it (over four years), and I seem to recall that others on here have the same behaviour.

I guess it may be a sign of something not being as it should be, but I'm not going to get too upset about it as it all works fine ...


Oli.

 

[Diver944]

ORIGINAL: zcacogp

I seem to recall that others on here have the same behaviour.

Mine too Oli. The level gradually finds its way down to around the minimum mark when cold but never goes any lower than that (and that's over the past 11 years and multiple coolant changes)

 

[robwright]

ORIGINAL: Diver944

ORIGINAL: zcacogp

I seem to recall that others on here have the same behaviour.

Mine too Oli. The level gradually finds its way down to around the minimum mark when cold but never goes any lower than that (and that's over the past 11 years and multiple coolant changes)

+ 1 for that that's where mine usually sits when it's cold.

 

[944Turbo]

ORIGINAL: the_dr38

No infact today I spent a bit of time with the bonnet open and managed to find the leak. There is a hose which connects onto a screw fitting above the top hose, it's a lot smaller, the screw is hollow and allows water to pass through. It was this which was leaking and as soon as I touched it, the screw broke, leaving practically all of the thread still in the socket and therefore no connection. Managed to get the thread out so hopefully I can get a new one from Porsche on Monday and use the car again because at present, it's now left 20 miles away at my fathers house.

I wonder whether this leak could be anything to do with the fan staying on? Once again I'm driving with the fuse out.

Regards

Lloyd

If that is on the radiator then I had one fail and I managed to find one very similar, from I think a fiesta rad in a garage beside where it failed.

Tony

 

[Fred Hindle]

Bleed the water system. Find the highest connection and undo it so it is loose (ish). Run the car and allow water to come out of the connection. When you are satisfied that no air is coming out and it is just water then tighten up th connection.
Top up the resevoir, sit inside the car and move the heater lever from cold to hot and back again a few times. Put the blower on and see if any heat is getting onto the screen.

Cheers,

 

[the_dr38]

ORIGINAL: 944Turbo

ORIGINAL: the_dr38

No infact today I spent a bit of time with the bonnet open and managed to find the leak. There is a hose which connects onto a screw fitting above the top hose, it's a lot smaller, the screw is hollow and allows water to pass through. It was this which was leaking and as soon as I touched it, the screw broke, leaving practically all of the thread still in the socket and therefore no connection. Managed to get the thread out so hopefully I can get a new one from Porsche on Monday and use the car again because at present, it's now left 20 miles away at my fathers house.

I wonder whether this leak could be anything to do with the fan staying on? Once again I'm driving with the fuse out.

Regards

Lloyd

If that is on the radiator then I had one fail and I managed to find one very similar, from I think a fiesta rad in a garage beside where it failed.

Tony

Fingers crossed, may not need to go over to Porsche at all then. Maybe could even find one tomorrow somewhere!!!???................No that's just silly

 

[robwright]

There is a purpose built bleed screw at the water discharge flange from the cylinder. I think it is 11mm IIRC. Top up the system with the screw open until coolant comes out the bleed screw. Run the engine and open the screw to release air from the system. Top up and repeat the exercise. This should be enough to do the job. All this should be done with the heater on full heat to ensure that the whole cooling system is filled. Run the engine to temp i.e. the fans come on with the heater running on full. Check and repeat if necessary.

 

[944Turbo]

ORIGINAL: the_dr38
Fingers crossed, may not need to go over to Porsche at all then. Maybe could even find one tomorrow somewhere!!!???................No that's just silly

Well if there is a breakers near you that you can rummage around you might get lucky

 

[vitesse]

Frankly,any bolt that fits will do as a temporary fix,it doesn't have to be hollow with the cross hole-it just means that you have to remove it to bleed the air & bubbles & then quickly screw it back in-it helps to have asbestos fingers doing it that way.[]

 

[944Turbo]

ORIGINAL: VITESSE

Frankly,any bolt that fits will do as a temporary fix,it doesn't have to be hollow with the cross hole-it just means that you have to remove it to bleed the air & bubbles & then quickly screw it back in-it helps to have asbestos fingers doing it that way.[]

That's the bleed screw on the castingon the front of the head - I think we are discussing the plastic outlet on the radiator above the other end of the top hose, it has a small pipe on it and screws into the rad.

 

[the_dr38]

Yes we are discussing this plastic outlet screw.

 

[Hilux]

+ 1 for that that's where mine usually sits when it's cold.

Well I`m staggered.......................

If you filled mine to max it stayed on max (although hard to gauge accurately due to the expansion tank design) It used a little water over a period but it was marginal.

If filled to max it then emptied to min I`d be concerned if it were mine as the system is designed to manage the water within those levels but if other cars tend to lose water and settle to a level then so be it. I`ve not seen it nor experienced it on any other car I`ve owned.

 

[zcacogp]

ORIGINAL: Hilux
If filled to max it then emptied to min I`d be concerned if it were mine as the system is designed to manage the water within those levels but if other cars tend to lose water and settle to a level then so be it. I`ve not seen it nor experienced it on any other car I`ve owned.

I'll grant you it's an odd one. Mine has always done it, and the first time I noticed it I worried about it, and decided I'd keep an eye on it as it didn't seem to be a 'problem' per se. Then I read about similar experiences of others on here and felt a lot better about it.

Thanks Rob and Paul!


Oli.