15 replies to this topic

[Stum3]

Hi Guys my 1977 1275 GT is overheating very quickly, i have recently changed the water pump

 

the top hose seems cold and i can see water/steam coming out of the thermostat housing at the bottom

 

when the temp get just above half way the expansion tank is being filled with hot water and spurting out.

 

i am hoping its just a stuck thermostat (and not head gasket) any ideas

 

Thanks

 

Stu

[CityEPete]

Have you got a compression tester?

[Swift_General]

Yep - pop the thermostat out and test it before you do anything else.

[cal844]

Remove the thermostat (fit a new gasket)

Edited by cal844, 12 May 2018 - 07:48 PM.

[mr3speed]

Are you matrix heater hoses higher than your radiator?

[Rorf]

First things first - was it overheating before you changed the water pump, what was wrong with the previous water pump? What condition was the water/coolant when you removed the pump. Did you flush the system especially the radiator.

[Stum3]

Have you got a compression tester?

No i dont unfortunately

[Stum3]

First things first - was it overheating before you changed the water pump, what was wrong with the previous water pump? What condition was the water/coolant when you removed the pump. Did you flush the system especially the radiator.

I Have never run it up to temp before due to the water pump (only just bought it as a project) the coolant was a rusty colour and no i just refilled it thanks

[area51]

I good idea is to remove the heater matrix and flush that out too.

[Stum3]

Are you matrix heater hoses higher than your radiator?

Yes one of the matrix heater hoses does loop above the rad level

[mr3speed]

This can cause over heating due to air locks, get them lover than the fill level and see if that helps

[Northernpower]

Hi Guys my 1977 1275 GT is overheating very quickly, i have recently changed the water pump
 
the top hose seems cold and i can see water/steam coming out of the thermostat housing at the bottom
 
when the temp get just above half way the expansion tank is being filled with hot water and spurting out.
 
i am hoping its just a stuck thermostat (and not head gasket) any ideas
 
Thanks
 
Stu

How can you see water/steam coming out of the thermostat housing?

[Stum3]

 

Hi Guys my 1977 1275 GT is overheating very quickly, i have recently changed the water pump
 
the top hose seems cold and i can see water/steam coming out of the thermostat housing at the bottom
 
when the temp get just above half way the expansion tank is being filled with hot water and spurting out.
 
i am hoping its just a stuck thermostat (and not head gasket) any ideas
 
Thanks
 
Stu

How can you see water/steam coming out of the thermostat housing?

 

Hi It was coming out of the joint of the housing and top of the head

[cal844]

 

Hi Guys my 1977 1275 GT is overheating very quickly, i have recently changed the water pump
 
the top hose seems cold and i can see water/steam coming out of the thermostat housing at the bottom
 
when the temp get just above half way the expansion tank is being filled with hot water and spurting out.
 
i am hoping its just a stuck thermostat (and not head gasket) any ideas
 
Thanks
 
Stu

How can you see water/steam coming out of the thermostat housing?
 

Hi It was coming out of the joint of the housing and top of the head

Take the housing off, make sure there's a gasket in place then refit

[Stum3]

There is a engine steady bracket over the thermostat seems solid wont budge

 

do i need to remove this at the bulkhead end there is a nut there but seems very hard to access?

 

Thanks