Thread: Water pump? radiator? thermostat? resevoir cap?

do what Mike 90 RR said, failing that change expansion tank cap.
had same problem last jan, had to stop dad from ripping all apart to fix the thermostat went and got a new cap, fix problem

mike..on going overheating problems..changed rad, thermostat and now viscous..seems to be of for a few months after each operation but then stars to overheat in traffic...found bubbles in the radiator when bleading

Originally Posted by mike 90 RR

1 ... Get the nose of the car up on ramps
2 ... Cabin heater to HOT
3 ... Take the radiator fill bung off (this is to let the air bleed out only)
4 ... Take expansion tank cap off
5 ... Located on top of the drivers side rocker cover is a pair of metal coolant tubes heading off to the cabin heater ... It has a bung ... This is where you fill with coolant ... Take the bung off and fill it up

Don't fill up any where else (expansion tank or radiator) ...
If you do, then you will suffer air locks and blowbacks all the time ... Just as you are currently experiencing


So .... do the following method ...
Fill the car with coolant ... Put the top bung back in when full .. Start car and warm it up ... Watch level through radiator bung // Stop car to do a major fill through the top bung only // Start car and continue warming ...

Keep doing this till the level of coolant is stable, just needs a little topping up .. which you can do through the radiator bung or the expansion tank

Keep filling & checking,all the time, till the car is fully warmed ... Drive it around the block .. Put it back on the ramps // cool it down, and check the level again

Mike

Houston we have a problem!! ..... seems the heater has been by passed the metal outlets are there but everything else is not! whoops.

Originally Posted by Avrio

mike..on going overheating problems..changed rad, thermostat and now viscous..seems to be of for a few months after each operation but then stars to overheat in traffic...found bubbles in the radiator when bleading

Fair enough ..

Since you've gone to so much trouble ... You could try one more fix ... Disconnect the coolant hoses to the cabin heater

Above the Drivers side rocker cover is the metal coolant pipes with the "fill bung" ... Loop "one pipe to the other" to complete the coolant circuit

Fill up with the nose of the car up (ramps / hill / tree stump)

Mike

Originally Posted by Titan Tyres

Houston we have a problem!! ..... seems the heater has been by passed the metal outlets are there but everything else is not! whoops.

Well ... Those metal pipes is where you fill your motor up ... They don't have to make connection to the heater .... If they are just looped & connected at the back ... Then you can still fill up at that top Bung

Failing that .... You can try ....

Just get the nose of the car up in the air (Ramps)
Take off thermostat housing & remove thermostat // replace housing only
Fill up through the radiator

Run car // check for fill
When full /// take off housing & reinstall the thermostat (Drill a 1/8 hole in the side of thermostat for air bleeding)
Top up with coolant

By the way ... If you went to the trouble of replacing the water pump ... Why not get your radiator rodded???

Originally Posted by mike 90 RR

1 ... Get the nose of the car up on ramps
2 ... Cabin heater to HOT
3 ... Take the radiator fill bung off (this is to let the air bleed out only)
4 ... Take expansion tank cap off
5 ... Located on top of the drivers side rocker cover is a pair of metal coolant tubes heading off to the cabin heater ... It has a bung ... This is where you fill with coolant ... Take the bung off and fill it up

Don't fill up any where else (expansion tank or radiator) ...
If you do, then you will suffer air locks and blowbacks all the time ... Just as you are currently experiencing


So .... do the following method ...
Fill the car with coolant ... Put the top bung back in when full .. Start car and warm it up ... Watch level through radiator bung // Stop car to do a major fill through the top bung only // Start car and continue warming ...

Keep doing this till the level of coolant is stable, just needs a little topping up .. which you can do through the radiator bung or the expansion tank

Keep filling & checking,all the time, till the car is fully warmed ... Drive it around the block .. Put it back on the ramps // cool it down, and check the level again

Mike

Mike is this a RR thing , as my 96 Disco doesn't have this bung you mention on the metal pipes that the heater hoses attach to.

Originally Posted by It'sNotWorthComplaining!

Mike is this a RR thing , as my 96 Disco doesn't have this bung you mention on the metal pipes that the heater hoses attach to.

Your right about that ... I believe they had the fill tubes on the earlier models (up to 94) ...Il'd still go for the remove the heater hose and up on ramp's // Nothing to lose if it works out ....

Originally Posted by Titan Tyres

Houston we have a problem!! ..... seems the heater has been by passed the metal outlets are there but everything else is not! whoops.

I haven't had anything to do with the V8's later than mid 80's. But rovers use the heater circuit for the coolant bypass circuit.

So either the heater must be connected, or fit a bypass hose connected between the pipes on the engine in place of the heater. This circuit is needed, and should not be blocked off as it allows the water pump to circulate water through the engine when the thermostat is closed.

Once the thermostat opens, the water pump can circulate coolant through the radiator.