Reply With QuoteHave you done anything with the water pump yet? Might be worth checking what state it is in - have a look under the cast bracket that holds the aircon/power steering/water pump to see if there's any sign of a leak through the weep hole.
Fossicker
Hi there everybody!
Have had intermittent problems with the coolant on my D2a (TD5 auto).
Randomly overheats, always managed to pull over before to far gone, just enough to set the warning light off.
Have replaced the expansion tank cap - no change.
Thermostat - no change.
Found a small leak in the heater feed pipe, replaced - no change. Not sure if this was a result of playing under the bonnet and creating the leak by bad pipe positioning.
Replaced the radiator ( the old one was partially blocked and warped).
Now when running and the system bled, there is still air coming from the bleed nut on the top pipe. Haven't driven anywhere yet.
Have had the coolant system pressure tested and all was ok.
Have good return flow to the expansion tank.
Bought the car about a year ago and drove from Melbourne to home on the Gold Coast, and then no problems since until about a month ago.
No oil in the coolant, no coolant in the oil. No evidence on the block of any coolant leaks.
Does this mean there is a leak in the head gasket?
How do I test the head without taking it off?
Have I simply missed something in the bleeding process?
Master
Have you done anything with the water pump yet? Might be worth checking what state it is in - have a look under the cast bracket that holds the aircon/power steering/water pump to see if there's any sign of a leak through the weep hole.
Master
Ditto on the water pump. Before I did mine it got so hot under the hood, never had the warning light though. Check my Profile for a thread titled rapid coolant loss. It has pictures of the weep hole and a write upTo replace.
Fossicker
had similar problem with mine . only used a cup every few months around town . flog it on a long trip towing and it would start to get hot after 5 or so hours due to a slow leak. when i put the bright pink nulon coolant the leaks showed pretty soon after . a few small drips around some fittings but i was losing most from weeping head gaskets . . i still havent changrd them yet . ran water only for a month with silver seal in it . crossed my fingers and re filled with nulon . has not leaked anymore since . but i will not be confident till i get the new head gaskets on. maybe your gasket is leaking from water passage into cylinder and going out tail pipe as steam . wont really show up in oil if its only a tiny amount . pull all your plugs and see if one is nice and clean compared to others . good luck with it all the best mat
Master
SupporterHi Guys,
I am getting something like this but more extreme.
As soon as I start the engine (which is now suddenly very hard to start), I get massive amounts of air pressure coming back through the water reservoir tank and through the pressure cap!
Is this a blown head gasket thereby pushing the cylinder pressure out through the water jacket and back through the water lines back to the reservoir?
I hesitate to ask but what am I looking at to get a replacement head gasket done on my 2001 Series 2 TD5 (assuming it hasn't warped the head?)
Cheers, Pete'
did you have the heater on full and disconnected the coolant tank by lifting it up off it's clips and then holding it up higher than any coolant spot on the vehicle when you were filling and had the bleeder hole on the top hose openOriginally Posted by tcgooge
Master
So after I fixed my water pump it seems like my coolant just doesn't wanna stay in there. It now leaks from the breather hose and because my driveway has a small incline it leaks overnight. Can anyone tell me why this is happening? I can only stop it if I keep it at about 1/4 full in the reservoir away from the breather tube. Sometimes I've just wanted to cut and shorten the thing in the tank but thought better of it. I know there is a mark on the tank saying cold level but if I fill of to that lip/protrusion it just leaks out again. It seems like there is too much pressure building up in the system or something but I don't know, I though it needs to be a bit pressurized? Coolant issues have been my most recurrent problem with my d2
Fossicker
SubscriberDon't know if it helps or not, but a bit of blue cellophane on the end of a torch, at night, illuminates the red coolant llike the dogs 'proverbials'. Really handy for spotting coolant leaks.
Fossicker
I had the same problem it turned out to be a leak in the oil cooler. Mine was caused by previous owners only putting in water not coolant . Hope it helps. It drove me crazy for months.So after I fixed my water pump it seems like my coolant just doesn't wanna stay in there. It now leaks from the breather hose and because my driveway has a small incline it leaks overnight
Master
Have to ask... Where's the oil cooler.... is it at the front of the engine near the fan as I've had a coolant leak from there before as the connection got really brittle and just gave way. My ONLY leak is from the reservoir breather tube that sits in the coolant tank and then hangs about over where the vaccuum pump thing is (I think that's what it is, I had to remove 2 plugs when I removed the EGR and had to tap it with a small screw). I see red all around it and when Im working underneath red coolant drips down onto the front diff and axle and gets me so annoyed. I just don't think I'm the only one who's had this issue as it seems relatively simple (yet complicated), water is beig pushed out of the breather tube (but why). If I let it drain it all I get to a 1/4 of a tank and there is no way that can be right, right? Any suggestions? If the oil cooler is not what I think it is I will have a look again but seems like my only loss now is from the tank itself in a way. Quite annoyed to say the least.
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