1

1984

New Member
Hi all I am new to the forum, got myself a 1995 landy disco today but it has a problem.

It has a water leak from the pgasket? and it also pressurising. When you run it with the water cap off, there is no leak as the water is pushing out through the water tank. therostat all ok.

No signs of head gasket blown, drives fine and pulls well, starts fine, no mayo or anything.

The gameplan is to get a new waterpump and pgasket and go from there really, just looking for advice first incase it might be something else?

Thanks
 
do that and check rad is hot all over the core surface as this is biggest reason for overheating,buy the 3 long bolts that go through drivers side of water pump and through into block as well as water pump
 
Sounds like there might be an air lock somewhere - that would account for no hot water going through the heater rad and the pressurisation.
 
Mine was like that no hot air water pressure blowing out the resovoir bottle.
no oil in water or vice versa
my head gasket was knackered.
top end rebuild sorted it though :)
 
When my P gasket went I had similar problems . It would presurise the system every now and again . I changed it and have'nt had any probs since .

I always let the excess air from the cooling system out via that plastic plug on top of the engine (mine been replaced with a brass plug ) . Then you'll prob have a toastie heater .
 
One of the workshop books suggested unbolting the header tank from its bracket and hanging it from the raised bonnet as high as poss with some string or similar to get some extra pressure while bleeding the system through the 'stat top bung. It works too !

I lost my first 300tdi engine to a bad rad so be told ! Clean both sides of it gently with a soft brush and/or blow it clean with an air line,from a distance so as not to damage the vanes.And do the all over heat check thing,as per JM.

P gasket is annoying to do but a common annoyance.When pressurised the coolant will find the weakest point.Do some searches on here about the P gasket job,there are a few things to know. With any luck thats all it is.HOWEVER, I have had/worked on many 300 head gaskets and not once yet seen the classic oil/water emulsion. So dont take the that as an indication.
 
By all means repair the faults you have found . The only way to be sure of a head gasket failure is to get a garage to do a sniff test and a pressure leak test. Regards Jonathan
 
jonathanp said:
By all means repair the faults you have found . The only way to be sure of a head gasket failure is to get a garage to do a sniff test and a pressure leak test. Regards Jonathan
Click to expand...

So removing the head and finding a fooking great hole in the gasket and clear signs of blowing thru the bores. Isn't a definite case of blown HG then :confused:

If I'd known that I'd never of bothered changing the Gasket meself. But would have taken it straight to a garage and let them arse rape me with their over inflated ripoff prices.. :doh:
 
Thanks for all the replys, my mate is going to fit a new water pump and change the pgasket for me, so I'll see what happens. We hope this will solve it, if not I guess it would be nothing else than the headgasket..
 
Had one through that had a warped ally front section so the p gasket would never sit flush and seal,had been changed X nunber of times with the bolts progressively stripped each time.Got a new ally piece,problem solved.I would have got it faced like a cyl head but the owner wanted new..........

oh,and get a GOOD water pump.If you buy cheap then you will be doing the job again in 3 months.Often better quality ones have moulded impellors rather than bent steel....but not always.Read the book,get new bolts,put them in with the spec threadlok to torque.
 
I am surprised no one has mentioned the fact that he just bought this? Take it back, unless you bought it knowing it had these faults.

Looking at the vehicles history a bit, you just bought it, why was the person selling? Because of this, has it possibly been diagnosed as having HGF and they have shifted it to you? It has a P gasket leak and there is possible HG failure, does it look like the pump has been touched recently (disturbing the pump can often disturb the P gasket then it leaks - why they should be done together to be sure it won't leak) has someone tried to fix this issue already? I would be takeing it back and asking questions, at the very least try and get some truth about the vehicle.

Anyway, what makes you think the pump is knackered?

With the engine cold, header tank brimmed, disconnect the heater feed pipe (one that comes from the top back) at the heater and have someone start the engine, does water rather quickly exit the pipe? If yes the chances are the pump is fine.

I suspect the HG has failed into the water channel hole in the block which doesn't actually have a corresponding hole in the head (just cools by contact rather than a through passage) when this goes the gas will push the water down and force all the water out because the gas isn't just escaping into the water galleries and bubbling out.
 
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Hi thanks for the reply, I brought it knowing the problem to be honest. The water pump looks untouched, I've seen on here and other sites people having the exact same symtoms for head gasket, but also for air locks, and other things. So the game plan is, change the water pump and pgasket, the pgasket has to be done as it's leaking so might as well do the pump while it's off. Cross fingers and hope that sorts it, if not, as you said it will be the head gasket, and we will have to do that too i guess. I feel it will be worth it as the engine drives and pulls like a train and it's a nice landy :eek: so fingers crossed it will be sorted
 
1984 said:
Hi thanks for the reply, I brought it knowing the problem to be honest. The water pump looks untouched, I've seen on here and other sites people having the exact same symtoms for head gasket, but also for air locks, and other things. So the game plan is, change the water pump and pgasket, the pgasket has to be done as it's leaking so might as well do the pump while it's off. Cross fingers and hope that sorts it, if not, as you said it will be the head gasket, and we will have to do that too i guess. I feel it will be worth it as the engine drives and pulls like a train and it's a nice landy :eek: so fingers crossed it will be sorted
Click to expand...


Fingers crossed the HG is OK.

If not the good news is you can have the head off one of these in about 40minutes.

I would strongly suggest you take it to a machine shop and have them pressure test and skim the head by a thou or so (ask them what they recommend to clean it up) so that you have a perfect surface to work with. I've done this a couple of times and its been money well spent. Should not cost more than £40 really. Then all you need to do is clean the block up.

Also, I would STRONGLY suggest you buy Elring (OE) bolts and HG. Turner engineering sell them. There really is no point in cutting corners here.
 
**update**

My buddy got to work today and took the water pump off, the impeller was off it, so the pump was knackered.

Fitted new pump and p gasket, along with new bolts and thermostat.

It is no longer leaking water and doesn't seem to be overheating (I'll give it a proper run tonight)

Weird thing is the air still isn't hot after bleeding for ages, but when you drive it and put your foot down a bit, the air becomes hot like normal, but then cools back down again as you slow the driving down :confused: :confused: :confused: :confused:

Any ideas
 
Ah ok, any way to check? it's brand new from john carddock in cannock so I can get it replaced.. i think
 
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