Huge V8 temp spike, why ?

My temp spikes from nothing to about 3/4 even if I'm doing nothing.

I moved the 109 about 20 meters rather slowly just to get all the oil back round the system and moving in the diffs, the coolant mix is about 60/40 in favour of coolant.

Is this a case of water pump not working right ?

The top pipe was hot to the touch and the bottom cold so I guess the radiator is working so what can I do to cool this beast down further ?


Looking for a fast fix, either changing the pump or just a dodgy thermostat etc.


Thanks



Also the carb has had a pipe cut on the front of it in order to re-route fuel from the pump through one split pipe coming off the other carb rather than one split pipe coming off the fuel pump or two single pipes on a divider, whats the best way to change the fuel flow ?

Take off the old cut pipe and put it back to a double off the pump or completely seal off the old inlet ?

sounds like you got no flow.....did the rad warm up evenly?

you can take the stat out if you suspect it.

But if your engine is hot and the bottom hose is still cool then there is nothing going round........pump or blocked rad

Thanks BB

Bollocks, better get a new pump then and look for a bigger radiator.

Might as well upgrade it to a larger one to try and keep the temp as low as possible

How can you tell which ones blocked ?

I flushed the system out by taking off the bottom hose and letting the fluid drain out of the radiator that way so I guess the radiator might not be the problem ?

Dr_evil said:

Thanks BB

Bollocks, better get a new pump then and look for a bigger radiator.

Might as well upgrade it to a larger one to try and keep the temp as low as possible

How can you tell which ones blocked ?

I flushed the system out by taking off the bottom hose and letting the fluid drain out of the radiator that way so I guess the radiator might not be the problem ?

Click to expand...

Better to flush it through with a hose, the water pump is low pressure and wont shift anything much, also bottom hose can be sludged up. Flush it all through

Cheers, I'll do that tomorrow then

Drain the new fluid I put in into a clean container so I can reuse it then shove a high ish pressure hose into the bottom of the pump to see if it shifts any sludge, probs be something in there as when I took the old fluid out it was a bit grubby and contained some solid-ish gunge parts.

If not I'll call into Landrover spares to see if they have any second hand water pumps and rads off something big like a Thor or 4.6 HSE

Didn't work re-flushing with hose, still spiking.

Bit slower today but it was cooler out, put in a stronger mix of coolant too

Apparently it could be a spring in the thermostat being stuck closed an not allowing full flow through ?

Thats what someone told me, how do you go about checking of is it a case of entire front end off and just look

see your other clone thread