Radiator help

[Aussie944S]

Lads,

Just spent all day inspecting and replacing parts on my 944 S at my mates workshop. (he is the car Mechanic)

he was really impressed with the the state of the car and components for such age and km's.

The Porsche mechanic when i got a pre-inspection told me that the water pump or a hose from or near has a slight leak and then told me the usual over priced cost to fix it it. from there i just told him "thats nice I'll do it myself". which brings us to yesterday.

i have put about 1500km's on her since the inspection, the only sign of water loss is when i bring her home and place her away in the garage she drops about 5 - 10 mil of water but does not loose any if i park at work or anywhere else which is weird.

We pressure tested her yesty and could not find a leak anywhere from the water pump or hoses from or near but she did start to leak from near the blue drain plug, we could not see exactly if it was from the plug as it was all wet.

Probably need a question by now...... I would like to know can the radiator be repaired if its the radiator and, Has anyone got an idea on what is going on with her?

I think I'm getting this water loss cause there is a leak somewhere but it only leaks when its under unusual pressure... Example drive normally, engine gets to op temp bring her home park in garage engine still at op temp and not much air flow in garage so the engine will rise in temp before cooling this increases the water pressure above normal and it leaks?

your help lads will be much appreciated

[porschetub]

Wheres the water dripping from?,if its the middle front it can be the pump,pull the covers off and check around the belts and rollers ,if theres a leak it doen't always follow a straight path down due to the angle of the engine.
The most likely culprit is the radiator cap if you have a leak left side front,sounds like this is the case as the radiators are usually good,make sure you get the uprated cap which I'am pretty sure the S2 has,tell us how you go.

[Aussie944S]

lads see photos as my left is your right and vise versa



the usual dripper

this one below is where she runs after i park her in the garage and on pressure test



driving me mental as on inspection the pump looked good and the seal looked good, actually everything looked good no signs of anything the only dried up coolant looked to be splatter like you get from flicking a wet tooth brush (we did clean it all down as well and re inspect after a final drive later that arvo still found nothing. its like she is hiding it from me but wants me to know theres something wrong buy only doing it at home

hahaha women... cars i mean cars well same thing i... hahaha

[Timmay!]

Aussie 944S,
Take the belly pan off for a few days. There's only 3 10mm (head, not shaft) bolts in the front- 5 at the rear. The pan will collect water and drop it elsewhere, misleading you. Especially if you park on an angle.
The water at the left side of the radiator could be from 5 sites:
1. the upper radiator hose (at the radiator)
2. the hose from the top left of the radiator to the coolant expansion tank
3. the thermal switch which controls the fans (check the round gasket here)
4. the blue plastic plug (check the gasket here also)
5. the left plastic side tank of the radiator. Sometimes we can see the source of the leak and crimp the side tank seal a little more and it will stop the leak.

I'd make sure that the system is not simply over-full, which would cause it to spill over the side thru the drain tube at the tank cap. There has to be enough room for air in the coolant expansion tank for it to do it's job.
You can shoot compressed air around the site to dry up any water and watch it for leaks.

[porschetub]

Darn thought you already had the pan off,ok take it off and place a sheet of plain paper or white cardboard underneath after a drive ,your leak will show to be straight above in that case.
You have the cooling system fully bleed right?
If its your radiator you would see a grusty white residue @ that point,stupid question but the drain bunk on the radiator isn't loose? right side of car from memory.

[Aussie944S]

sorry lads didnt think to leave the pan off. probably gunna have to wait till next weekend as we have some crappy weather henging around where i live

as for too much fluid could be a cause as well been keeping it topped up every second day so she might have a bit too much in her

i'm going to rip the front off completely this time when i re-pressure test the system so i can have a real good look at the radiator. might even just pull it all apart and put it back together.

still weirds me out how sometimes its leaks and sometimes it doesnt

[mattdavis11]

Water pump seal.

[Aussie944S]

mattdavis11,

could be on the money there mate, just had a gander at it after pop'n her in the garage n well it looks like its coming from the waterpump seal as its dripping on the power steering pump off that n onto the pan.

if its the seal do i have to replace the pump or just the seal the pump looks fine

[Aussie944S]

Lads,

just an update, pulling her apart this weekend ordered basically everything but a new motor should have that stuff next week.

if i don't need it I'll store it for later.

Ill keep everyone posted on how it goes


peace out

[Aussie944S]

lads a few pics on how I'm doing. took the rad out going to get it re-freshed its got crap stuck in the fins plus have the seals replaced.

I'm guessing the water pump seal has crapped it self cause the more i started pulling off the car the more it started to drip from just under the water pump.

biggest drama I'm having is understanding the TDC procedure on Clark's garage. I cant see anything that looks like the 1st picture but can see whats displayed in the third picture.

any way everyone likes pics so here you go

[krystar]

setting TDC. from the driver side fender, look at the center of firewall. you should see the 2 speed/reference sensors. below that underneath alot of wiring and lines is a rectangular hole. while shining a really bright flashlight into that hole, have a helper turn the crank, you should see the flywheel spinning in that hole.

if you can't find the hole, take out the #1 spark plug. put a a straw or a chopstick or something long into that hole. turn the crank until the straw is as pushed out of the hole as possible. now you should see on the cam gear the notch is line up with the mark on the upper right side. if it's not lined up, you're on the wrong compression/exhaust cycle. just keep on turning on the next time the #1 piston comes up to the top

[Aussie944S]

After your post i had a real look not a man look and well the only opening that i can see near fire wall was behind my oil fill point.... After perching myself like a bird on my side fender i could see what looks like a 2 square holes one shows a toothed looking thing the other has a grooved notch on a smooth thing..... i use "Thing" as a world recognized way of describing parts.
I have posted a photo of where i was looking to see if this is the right spot bellow all this black stuff that to other things.

[CatsEyes]

Hey Aussie,

Maybe we should get together down at your place and I can at least point you in the right direction. And you can remedy my ignorance in some other things! I'll pm.

The hole in the clutch bellhousing is easily found. Right below and to the driver's side (RHD) of the reference sensors. It's the little hole the bolt on those sensors naturally falls into when you take them off.

You have to squint into that hole to see the marker. After 25 years of gunk it may not be easy to see in there...

[porschetub]

Geez Aussie ,that radiator, have you been driving through bushflys or something,really gunked up,could be ok with a clean or is it stuffed?,cheers mate.

[Aussie944S]

porschetub,

mate the amount of crap that fell out was crazy dunno how the system worked hey. I think i have a seal problem on the drain hole side so i'm going to get it cleaned up n fixed while i wait for the parts to arrive.

You should see the a/c thingy bob, its even worse theres like a billion stones lodged in the veins and bugs ive been sitting in front of the car with a stiff bit of plastic digging them out and trying to straighten the bent bits.... a/c works like a dream though

[Aussie944S]

catseyes

sounds good bud

[porschetub]

Sorry mate but I don't think me a smart ass but I mentioned the drain bung in my reply earlier on,they have a soft sealing ring they leak if they are too tight or too loose ,sounds strange but thats what happens,good to hear you have good A/C you need that in the part of the world,by the way my cars running like a runaway horse so I had a couple of cold ones later today even give it a wash .

[Aussie944S]

porschetub,

bud its a brand new bung, been trolling through the service history it got replaced a month before i bought the car during a minor service here is a photo of where it leaked from when i pressure tested the system. this water leak is bugging me cause the rest of the car is realy good.

[968 GUY]

Probably the plastic tank is separating from the aluminum core.

[ernie9944]

[QUOTE=Aussie944S;6311784]After your post i had a real look not a man look and well the only opening that i can see near fire wall was behind my oil fill point.... After perching myself like a bird on my side fender i could see what looks like a 2 square holes one shows a toothed looking thing the other has a grooved notch on a smooth thing..... i use "Thing" as a world recognized way of describing parts.


Your looking at the rigth place ,remove your (oil filler cap) it will give you a better chance to see it.Pic is of my 968, but yours should be approx in the same location.