Club 80-90 Forums

1.9 DG
I got out of the van earlier after a 30 minute drive and I swear I could hear it bubbling away. only had a quick look as its dark, pipes around the thermostat housing are very hot. But the coolant in the header tank is cool to touch. Temp gauge still reads the same ( just above the LED when warm)

Could I have a duff pump? Or an airlock?

Thanks

Thanks for your replies,

Yes I am paranoid Kev!

So went for a run in the van to get it up to temp. Parked on a slight hill and undone the radiator bleed nut. Nothing, no air or water. Radiator is stone cold.
After feeling about, the pipe going away from the thermostat housing to the radiator is cold but the thermostat is red hot. Have read somewhere that to test the thermostat you remove it and put it in boiling water, have just done that and I can't see any movement at all, should it be quite clearly moving in and out?
It's only about a year old and was a decent one from brickwerks.

reads like your stat is not working... however..

your temp guage is reading from the thermostat not the radiator.
you will feel a cool pipe to the thermostat ..it's coming from a cold radiator! (look at the diagram!)

I would suspect that this was a short journey.. try 10 miles... with gusto.. then feel the pipes

the thermostat opens at 87 deg so in boiling water the center of it should open 10 mm
If you suspect a duff stat I would change it.. get a GSF one, cheap enough.

I have a few good ones here would you like me to send you one?

Thanks for the offer and advice Kev, I will nip to GSF and get one tomorrow.

I will let you off for necking my last beer at camperjam now!

Red Westie wrote:Were the coolant hoses hard/under pressure? just thinking about the possibility of a failing pressure cap... because without the ability to pressurize the systems coolant will boil at 100C instead of 110-115C under pressure.

Martin

Is that the Dalek cap? That is brand new from Brickwerks. Pipes don't seem under pressure at all, don't even feel like they have water in them!

I will let you off for necking my last beer at camperjam now!

Now now... bearing grudges doesn't suit you at all

The hoses only really get hard and so under pressure, after a run.
Yup Darlek cap is the pressure cap.

Martin

Read this - it might be applicable - check out the bits I put in BOLD RED

ghost123uk wrote:From a recent thread I took part in =

ghost123uk wrote:

Epiphone wrote:So this probably stems from an air lock and subsequent over heating, as I did have a water pipe burst during the winter.

Possibly yes.

From that "long post" see this =

KarlT wrote:Also more thoughts...........
Cleaned out the bleed pipes from top of engine. This was in one............



While the other was blocked by plastic, the T' junction mold hadn't been cleaned out properly, Had to drill it out. I'm sure the pressure build-up is what eventually caused the seals to go.

Go & check your bleed pipes, Just disconnect from engine & check that coolant can run out. If it can't look further.

I too had exactly the same type of blockage in 2 places in the thin pipes that run around the lip of the engine bay, and also in the thin part of the rubber one that comes from the rear of the left hand head, and goes to the afore mentioned metal pipe. This causes the water to cease flowing around the l/h cylinder head, that in turn causes the water to boil, in my case the "dalek" cap was not releasing the excess pressure fast enough and that caused 2 x hoses to blow out. (I think this was what killed my original engine as it was that l/h rear cylinder that semi seized)

Check all those thinner water pipes in the engine bay for blockages[/b]

Take care as if it is this and that l/h head is not getting cooling water it could end up in a BIG bill (as it did for me = replacement engine )

similar problems here so i thought i'd add to to this thread rather than start another.

Rock hard pipes, very hot, loads of pressure in the top tank. Leave it for a while and it's ok. Next morning, water all over ground under where pipe comes out of head. It's happened before so i just filled with water. Mate says ah...more coolant needed, too much water. So emptied engine block of water, about 2-3 litres then pour in same amount of coolant. As long as I stick around the 20mile trip mark, she copes fine, still hot but no pressure. I haven't had any reason to do more than 50 miles so need piece of mind. Shall i drain the system and refill half and half? New daleck top on way aswell. Why does the water leak after shes slept?
Gonna be around most of day so will check back as day progresses.

Beautiful here on Anglesey, temp up to 20 and it's only 11am.
Have a nice day

Swapped my thermostat this morning and took it for a hard 25 mile blast. All seems normal again, gauge reads where it used to just above the LED, no more boiling!

Thanks for everyones help

just had a thought. The fan/alterternator belt has been sqealing like a trapped rat for about a month. It stops after a short distance and all seems well. JUst tried turning the water pump wheel manually and it turns easily. Should this be the case? If it's slipping(which it must be given that i can hand turn the wheel without the belt stopping it) then it goes without saying that the pump isn't working to full capacity. Does it not? I know the belt isn't the right one but it's worked upto now. The engine is a 19D 1Y caddy(dont know year). Any clue on which belt to buy?
Cheers

docklad wrote:just had a thought. The fan/alterternator belt has been sqealing like a trapped rat for about a month. It stops after a short distance and all seems well. JUst tried turning the water pump wheel manually and it turns easily. Should this be the case? If it's slipping(which it must be given that i can hand turn the wheel without the belt stopping it) then it goes without saying that the pump isn't working to full capacity. Does it not? I know the belt isn't the right one but it's worked upto now. The engine is a 19D 1Y caddy(dont know year). Any clue on which belt to buy?
Cheers

@ Docklad, surely this is just a case of setting the belt tension to the correct setting ?

HI, The adjuster is as far as it'll go and there is some slack still. Smaller belt maybe?

docklad wrote:HI, The adjuster is as far as it'll go and there is some slack still. Smaller belt maybe?

... Hey, perhaps the right belt might fix it.

you could be on to something there kev Don't suppose you got the part number in your wallet have ya?