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Where else can coolant leak from?

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After having what I assumed was all the coolant leaks you can have on a DX I am still losing coolant.

Its dropping from full to min in the tank over the course of around 20miles  

Most hoses have been changed, the water pump and thermostat housing are all good and I've recently replaced the matrix and coolant cap.

Only place I can see coolant is the odd drop coming off the bell housing but cant see where its coming from

Any ideas?

Current rides:

2003 BMW 330d Manual Saloon Msport
1985 GTI cabriolet black edition (42k miles)
1999 Triumph Daytona 955i Post apocalyptic, rat, brat, scrambler, steam punk, cafe racer

IMG_20190803_123357.jpg

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Where else can coolant leak from?

Head gasket?  Being burnt and spat out the back???  


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Just to check - you are measuring level before and after 20 miles run when coolant is cold?

1986 GTI Cabriolet ("dambuster")

2000 Mk4 Cabriolet Avantgarde (bought for the mrs)

2001 Zafira 1.8

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Drips on the bellhousing, usually are but not limited to.

Bad Expansion tank, or lines to Radiator(matrix).
Bad Hard line by-pass to the heater valve including the heater valve…see my how to beef up new heater valves, or replace it with one from a 1983-84 Porsche 944 works better and more like the oem gate valve of the 70's and early 80 Golfs…..
Plastic flanges on water outlets.
Side of the heads outlet flange hose to the heater matrix.

Bad heater matrix.

If you are using the green AF it will fluoresce under UV light and shine so you can see where it may be coming from.

I had a leak that was hard to diagnose and until I shone a UV light inside the Radiator Shroud, that is when I found the Matrix leaking from the seam where the core met the sides….

The other one I had issues was a leaky WP that hit the pulley and was too fine a mist to show up with UV until it got really bad and I spotted the tell-tale drip on the Pulley.  Really Stupid Design to place the weep hole on the top under the pulley instead of the bottom….
 

What do Divorces, Great Coffee, and Car Electrics all have in common?

They all start with GOOD Grounds.

Where are my DIY Links?

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I had a hair line crack in my expansion tank and when things got warm and under pressure the crack would open slightly and let the coolant out, it would track along the thicker bottom hose and drip onto the gear box.

Have a very good look at the expansion tank.

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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LeeO said

Just to check - you are measuring level before and after 20 miles run when coolant is cold?

Yep thats correct



mark1gls said

I had a hair line crack in my expansion tank and when things got warm and under pressure the crack would open slightly and let the coolant out, it would track along the thicker bottom hose and drip onto the gear box.

Have a very good look at the expansion tank.

Well the car is on axle stands (again) ready for me to change the sump out.

I think while its running and warming up in prep to drop the oil out I'm going to have to lay underneath it and keep an eye on things.

I changed the cap and sensor but not the tank itself so it could well be



Briano1234 said

Drips on the bellhousing, usually are but not limited to.

Bad Expansion tank, or lines to Radiator(matrix).
Bad Hard line by-pass to the heater valve including the heater valve…see my how to beef up new heater valves, or replace it with one from a 1983-84 Porsche 944 works better and more like the oem gate valve of the 70's and early 80 Golfs…..
Plastic flanges on water outlets.
Side of the heads outlet flange hose to the heater matrix.

Bad heater matrix.;.
 

Im wondering if when I swapped the matrix out I upset something further down the line on the same hoses


Current rides:

2003 BMW 330d Manual Saloon Msport
1985 GTI cabriolet black edition (42k miles)
1999 Triumph Daytona 955i Post apocalyptic, rat, brat, scrambler, steam punk, cafe racer

IMG_20190803_123357.jpg

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Similar to mark…my mk2 had coolant loss was on pipe to the oil cooler and could only see it when accelerator pressed.. when demanded fuel and cooling. Small pin prick but 30 miles was enough to need top up.. small leaks on small expansion filler pipe also. So better warm and with accelerator depressed a little. Full hose kit from b&b components on Ebay is 70£ in black..  new jubilee in stainless 10 halfrauds

On the drive
T25 Diesel…sameoldblueshi£ (currently under resto)
Rocco gt2….1990 secret 2…(currently under resto)
Mk4 99 1.8t indigo blue Gti with 43k miles
Caster 93 clipper JH Green cabby
Snowy 91 GTi White cabby( sat waiting for inspiration)
Myvalver 89 GTi Grey mk2 16v
Yuppy Flu 91 GTi Flash Red Sportline


 Golf mk1 owner's club on Spotify

Mk1 golf owners club playlist: Golf mk1 owner's club playlist - YouTube

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Found my leak . . . . Bit embarrassing really

2019-05-27 17.28.53.jpg

Clip was rattling round the bottom of the pipe

Current rides:

2003 BMW 330d Manual Saloon Msport
1985 GTI cabriolet black edition (42k miles)
1999 Triumph Daytona 955i Post apocalyptic, rat, brat, scrambler, steam punk, cafe racer

IMG_20190803_123357.jpg

Post

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still at least found it...

On the drive
T25 Diesel…sameoldblueshi£ (currently under resto)
Rocco gt2….1990 secret 2…(currently under resto)
Mk4 99 1.8t indigo blue Gti with 43k miles
Caster 93 clipper JH Green cabby
Snowy 91 GTi White cabby( sat waiting for inspiration)
Myvalver 89 GTi Grey mk2 16v
Yuppy Flu 91 GTi Flash Red Sportline


 Golf mk1 owner's club on Spotify

Mk1 golf owners club playlist: Golf mk1 owner's club playlist - YouTube
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