P38A Overheating

Hello I've just bought a 4.6 hse autobiography 97 plate it is a petrol and automatic. It over heated after about 30 mins driving so the garage changed the thermostat and it boiled up again.
So they then changed the water pump and again it boiled up.
Any advice would be much appreciated.
Steve

Did garage bleed correctly?
Buy another? Or too late?

Viscous fan? Your garage should know ?? Get it hot and try to stop the fan with a rolled up newspaper. If you get confetti its fine, if it stops that your problem.

Take it back and get your money back

J

Any other symptoms?

Is it puking it's guts out every time you run it?

Rock hard hoses?

Take it back. How many miles on it?
Or,

• Get it pressure-tested for leaks.
• Change the expansion bottle cap.
• Check the expansion bottle for any cracks near the threaded lid portion.
• Get the water tested for the presence of combustion gases.

Make sure the small bleed hose from rad to expansion tank is clear and you have a small jet of water squirting in the tank.

Unless you plan on handing back the car....probably radiator is partially blocked - either someone mixed coolants (what colour do you have now?) or it got filled full of sealant which blocked up the galleries. Was it over-heating on the open road or while standing/ in urban traffic? Make sure the coolant level is properly topped up, and bled though

oakey said:

Did garage bleed correctly?
Buy another? Or too late?

Click to expand...

I dont think they did just poured it in and said that there wasn't any bleed points on it.

romanrob said:

Unless you plan on handing back the car....probably radiator is partially blocked - either someone mixed coolants (what colour do you have now?) or it got filled full of sealant which blocked up the galleries. Was it over-heating on the open road or while standing/ in urban traffic? Make sure the coolant level is properly topped up, and bled though

Click to expand...

Thanks for the reply its got red coolant at the moment, not sure if any sealant has been added sometime previous.
It ticks over just fine but over heats after about 30 mins driving.

Henry_b said:

Any other symptoms?

Is it puking it's guts out every time you run it?

Rock hard hoses?

Click to expand...

Thanks for the reply its over heating after about 30mins driving but the hoses are spongy.

oakey said:

Did garage bleed correctly?
Buy another? Or too late?

Click to expand...

Thanks for the not paid for yet waiting to see it running properly before i part with any money is there a set process for bleeding them.

remove the overflow pipe from the radiator then fill the header tank then squeeze the top hose and plug the overflow with a finger when releasing the hose so it sucks coolant in and blows air out when you squeeze the hose. Keep doing that until coolant comes out of the overflow (it'll take a while and you'll need to top the header up a few times). Then put the pipe back on and carry on only this time plug the hole in the top of the header where the jet of coolant comes back into the header. Eventually, you'll no longer be able to hear bubbles in the system and at that point you know you've got the air out.

Henry_b said:

remove the overflow pipe from the radiator then fill the header tank then squeeze the top hose and plug the overflow with a finger when releasing the hose so it sucks coolant in and blows air out when you squeeze the hose. Keep doing that until coolant comes out of the overflow (it'll take a while and you'll need to top the header up a few times). Then put the pipe back on and carry on only this time plug the hole in the top of the header where the jet of coolant comes back into the header. Eventually, you'll no longer be able to hear bubbles in the system and at that point you know you've got the air out.

Click to expand...

Thanks for the reply i will try that this evening and see how it goes .
Steve

First do the newspaper test, then feel the hoses are they hard, air in the system? these things cost nothing £0 try free first....

Better still, follow the LR procedure. Always works for me. (The red text is my addition !!)

RAVE says :-

Refill
8. Ensure sufficient coolant solution is available.
9. Inspect radiator drain plug ’O’ ring, renew if required.
10. Fit drain plug to radiator. Tighten to Max 6 Nm (4 lbf.ft)
11. Remove safety stands. Lower vehicle.
12. Disconnect radiator bleed hose at the radiator.
13. Blow through hose to clear any residual coolant. Then Reconnect hose.
14. Fill expansion tank until coolant is level with base of neck.
15. Start engine, continue filling at expansion tank until coolant level stabilises at the ’COLD LEVEL’ marking.
16. Run the engine until the thermostat opens (top hose becomes warm).
17. Stop engine, allow to cool.
18. Check coolant level, top-up as necessary.
19. Refit expansion tank filler cap.

I was expecting more profanity

RangeRoller dt said:

I was expecting more profanity

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I'm sure you were you fecking cant.

stevesky said:

Hello I've just bought a 4.6 hse autobiography 97 plate it is a petrol and automatic. It over heated after about 30 mins driving so the garage changed the thermostat and it boiled up again.
So they then changed the water pump and again it boiled up.
Any advice would be much appreciated.
Steve

Click to expand...

Viscous fan.

Datatek said:

Viscous fan.

Click to expand...

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