Overheating issue - MG-Rover.org Forums
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post #1 of 4 (permalink) Old 02-02-2014, 10:38 Thread Starter
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Join Date: Feb 2014
Car: MG ZR
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Overheating issue


So I am having a wyrd problem with my MG ZR, its a 1.4 petrol model, 04 plate.

The car starts to overheat after being driven for a while.

It starts fine and runs fine, idles consistently without any wyrd sounding changes in noise. There is no 'mayonaise' on the oil cap, the dipstick just has clean oil on it and there is not oil that I can see in the coolant or on the coolant cap.

I thought it may just be an airlock or something so decided to check that. So I removed the coolant cap, and removed the metal bleed screw (literally fully removed the screw). At this point the expansion tank is full but nothing is coming out of the bleed screw hole and the level of water in the tank remains the same. What does this indicate?

If I squeeze the upper and lower radiator tubes then water goes in/out of the expansion tank but I have not seen any water at all coming out of the bleed screw hole.

Any advice would be much appreciated
jaythompson is offline  
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post #2 of 4 (permalink) Old 02-02-2014, 15:43
Join Date: Mar 2010
Location: Chester
Car: 1989 R0ver 213.
Posts: 335
poke a little screwdriver or something similar in the hole, I have known the hole to be blocked under the bleed screw.
jensden51 is offline  
post #3 of 4 (permalink) Old 02-02-2014, 16:45
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Location: Waiwhetu, NZ
Car: Year 2000 Rover 216 SLi "Bubble shape"
Posts: 165
Originally Posted by jensden51 View Post
poke a little screwdriver or something similar in the hole, I have known the hole to be blocked under the bleed screw.
I second the above - found it completely blocked twice now, once when we first got the car years ago (that was a confusing), then again a couple of months ago (no surprise the second time)...
paul_spencer is offline  
post #4 of 4 (permalink) Old 02-02-2014, 17:27
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Car: MG ZR
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Thanks guys, will give it a go.

Don't know why I did not think to try that myself!
JayT is offline  


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