Thread: hot v8

Originally Posted by Road Stone

Have you tried checking the rad for hot/cold spots?


You do this on the car has warmed up and feel at the top, then bottom of the radiator fins. If there are cold areas it generally means there is a blockage somewhere.


Cheers, Jerry

rads only 6 months old - flushed it today ane its fine and flows well. culprit is def the viscous fan - spins freely even when hot. its just not pulling enough air through. highway speed ok, but when in traffic or idle it warms up real quick.

im very confident the whole cooling system is fine except for viscous fan.

Even did a heater core flush today and flowed through fine.

My method is to fully flush everything with tap water, then i use my low pressure electric pump to pump through distilled water in evey part of the colling system.

Finally i pump through coolant into everywhere to ensure all the plain water is out using a pump.

Then top off coolant via the header tank and bleed air out.

heres a few pics of how i flush and pump coolant into the heater core. Cheap pump - a cheap $19 camping shower from BCF. Used this for years on various cars to ensure i get a full flush and full of coolant and not water

OMG i solved it.

Just did test run - 88deg at speed, then driving slow in the burbs it hit 90 deg. Come home and sit in the driveway just idling - 90 deg - sat for 10 mins like this, then drove out my driveway and straightback down to 88deg.

Fan is working allbeit not as strong as i though it would.

But, here the thing that i know will spark others to say how dare I ....

THE RAVE DIAGRAM IS WRONG.

Dont follow it if you are installing a thermostat. This has probbably been pointed out on here before, but i couldnt find it in any posts.

Below is the rave diagram - clearly shows the angled y piece going to the upper hose and radiator.

BUT - the angled Y peice goes to the pump.

I bought a new thermostat and installed it exactly how the previous owner had the one in there (which was done by a landrover dealer in Melb according to the service book)

So i put my new thermostat in exatcly the same way - just like in RAVE

Now as i bought a generic 82 deg thermostat it didnt have any markings on it like the word PUMP

So anyways, after doing some reading on here i seemed to pick up that some say the angled Y peice goes to the pump.

Turned the thermostat around and hey presto - runs perfectly.

Previous owner had it around the wrong way too.

Damm it feels go to have solved this.

In any case, entire cooling system has been flushed, cleaned and renewed.
Probbably still throw a new viscous fan on it for peace of mind soon anyway.

That's strange, what kind of RAVE do you have there?, see attached the pic from mine and it's exactly like you say, the angled piece goes to the pump, also AFAIK there is a certain difference between the OD of the straight port and the angled one which means the previous owner should have noticed that IMO