Boiling up!!

powell · 16th May 2018, 12:00

Hi all. New to the zt v8 scene.
Just bought my first mg zt 260..
But it's throwing coolant out the expansion cap.. Now I tried a new one(from my v6 zt) with the same rating and still does it..
Also heater seems to be constantly blowing hot.. Could this be related??
Many thanks in advance

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powell · 16th May 2018, 18:14

I drove it for 3hrs to home and seemed OK apart from smell of coolant and heater stuck on hot..
I've had my Bluetooth diagnostic tool in and it starts coming out from cap at around 76-78deg so not boiling..
I'm going to remove thermostat the weekend to see if this helps. Seems like a circulation issue..
Car has done around 154k miles.. Runs very smooth but could benefit from a service

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Tim · 16th May 2018, 19:32

Three places to check, thermostat, heater valve and water pump.

I'm betting water pump. All replaceable

Dominic22 · 16th May 2018, 21:59

is the fan working

powell · 17th May 2018, 04:11

Quote:

Originally Posted by Tim

Three places to check, thermostat, heater valve and water pump.

I'm betting water pump. All replaceable

Thank you.
I'm pulling thermostat out the weekend.. Water pump seems OK.. No leaks wobbles or noises from it but heater still constantly blowing hot air.... Apparently it's already had a heater valve change..

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powell · 17th May 2018, 04:12

Quote:

Originally Posted by Dominic22

is the fan working

Yes fan seems to be working

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planenut · 17th May 2018, 06:52

Be careful that you are not overfilling the expansion tank; the marker for the MAX is almost at the bottom of that tank and can be difficult to spot. Too much fluid will be expelled as the system does it's job.

powell · 17th May 2018, 07:34

Quote:

Originally Posted by planenut

Be careful that you are not overfilling the expansion tank; the marker for the MAX is almost at the bottom of that tank and can be difficult to spot. Too much fluid will be expelled as the system does it's job.

I did fill it higher than that.. I'll check it later.. Cheers

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powell · 17th May 2018, 13:28

Thermostat removed.. Still comes out from expansion cap but at 92 deg.. Checked thermostat and it opens but new one ordered anyway.
Water pump next.. Collect it Friday.
If that don't work then its got to be heater valve I guess... Where exactly is it? Is it that by pollen filter?

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kaiser · 17th May 2018, 15:39

If all is well with cap and thread and no cracks in the plastic, it sounds like a head gasket leaking combustion pressure into the coolant, forcing fluid out.
Do a test.

16th May 2018, 12:00	#1
powell Regular poster MG ZT 180 SE Sport..MG ZT TURBO. .MG ZTT 260 SE Join Date: Mar 2009 Location: Grays Posts: 31 Thanks: 12 Thanked 8 Times in 5 Posts	Boiling up!! Hi all. New to the zt v8 scene. Just bought my first mg zt 260.. But it's throwing coolant out the expansion cap.. Now I tried a new one(from my v6 zt) with the same rating and still does it.. Also heater seems to be constantly blowing hot.. Could this be related?? Many thanks in advance Sent from my G8141 using Tapatalk __________________ [SIGPIC][/SIGPIC]

16th May 2018, 18:14	#2
powell Regular poster MG ZT 180 SE Sport..MG ZT TURBO. .MG ZTT 260 SE Join Date: Mar 2009 Location: Grays Posts: 31 Thanks: 12 Thanked 8 Times in 5 Posts	I drove it for 3hrs to home and seemed OK apart from smell of coolant and heater stuck on hot.. I've had my Bluetooth diagnostic tool in and it starts coming out from cap at around 76-78deg so not boiling.. I'm going to remove thermostat the weekend to see if this helps. Seems like a circulation issue.. Car has done around 154k miles.. Runs very smooth but could benefit from a service Sent from my G8141 using Tapatalk __________________ [SIGPIC][/SIGPIC] Last edited by powell; 16th May 2018 at 18:16..

16th May 2018, 19:32	#3
Tim Feel the size of my Quads MG ZT 440SE, MG HS PHEV & MG3 Join Date: Nov 2006 Location: Addlestone Posts: 1,735 Thanks: 0 Thanked 128 Times in 85 Posts	Three places to check, thermostat, heater valve and water pump. I'm betting water pump. All replaceable __________________ Member 23 or 63 depending on what you look at. https://www.two-sixties.co.uk/mgoc26...0rum/forum.php http://two-sixties-blog.com/ http://www.youtube.com/user/TheTwoSi.../1/1wPt2rhd_Ps

17th May 2018, 13:28	#9
powell Regular poster MG ZT 180 SE Sport..MG ZT TURBO. .MG ZTT 260 SE Join Date: Mar 2009 Location: Grays Posts: 31 Thanks: 12 Thanked 8 Times in 5 Posts	Thermostat removed.. Still comes out from expansion cap but at 92 deg.. Checked thermostat and it opens but new one ordered anyway. Water pump next.. Collect it Friday. If that don't work then its got to be heater valve I guess... Where exactly is it? Is it that by pollen filter? Sent from my G8141 using Tapatalk __________________ [SIGPIC][/SIGPIC]

17th May 2018, 15:39	#10
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	If all is well with cap and thread and no cracks in the plastic, it sounds like a head gasket leaking combustion pressure into the coolant, forcing fluid out. Do a test. __________________ Worth his V8 in gold

16th May 2018, 21:59	#4
Dominic22 Posted a thing or two Rover 75 V8 Plus Others Join Date: Jul 2011 Location: Swadlincote Posts: 1,603 Thanks: 18 Thanked 163 Times in 81 Posts	is the fan working

17th May 2018, 06:52	#7
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,954 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	Be careful that you are not overfilling the expansion tank; the marker for the MAX is almost at the bottom of that tank and can be difficult to spot. Too much fluid will be expelled as the system does it's job.