I am unable to locate the thermostat coolant bleeder valve on a 20v ST. Does anyone have a picture of it by any chance?
Thanks,
20v thermostat coolant bleeder valve
Re: 20v thermostat coolant bleeder valve
tommy_t wrote:I am unable to locate the thermostat coolant bleeder valve on a 20v ST.
Can't say I have ever heard of that item
Nevertheless, it sounds as if it should be located in the water routing block attached
at the rear of the head. That seems to be where the thermostat and related items live.
Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
Re: 20v thermostat coolant bleeder valve
Is it possible that the 20v does not have a thermostat bleeder valve?
The 4age that is found in MR2s have this valve, but I can't find anything confirming that the 20v has this...
Maybe that the 4age in the MR2 has this valve due to the longer distance between the engine and radiator but it was not needed in the FWD 4ages?
The 4age that is found in MR2s have this valve, but I can't find anything confirming that the 20v has this...
Maybe that the 4age in the MR2 has this valve due to the longer distance between the engine and radiator but it was not needed in the FWD 4ages?
Re: 20v thermostat coolant bleeder valve
Ahhhh.... with you now 
I see that the MR2 does have a valve located on
the thermostat housing for bleeding air when re-filling the cooling system.
Since I only ever worked on an AE86, and they don't have any such valves,
I had never come across one before.
If the 20V is installed in a FR car such as an AE86, there won't be any bleeder
valves. Usual procedure for filling the cooling system is fill thru the radiator
cap and "burp" the system by squeezing on the radiator hoses. Turn the
heater onto maximum hot, then let the engine idle with the cap off. When
the thermostat opens you will see water start to circulate inside the radiator.
Gently raise the engine revs by around 1000-2000 rpm a few times until
bubbles no longer appear at the radiator neck.
Top up the radiator (if you blew water out by revving the engine too high).
replace the cap and done.
Cheers... jondee86
I see that the MR2 does have a valve located on the thermostat housing for bleeding air when re-filling the cooling system.
Since I only ever worked on an AE86, and they don't have any such valves,
I had never come across one before.
If the 20V is installed in a FR car such as an AE86, there won't be any bleeder
valves. Usual procedure for filling the cooling system is fill thru the radiator
cap and "burp" the system by squeezing on the radiator hoses. Turn the
heater onto maximum hot, then let the engine idle with the cap off. When
the thermostat opens you will see water start to circulate inside the radiator.
Gently raise the engine revs by around 1000-2000 rpm a few times until
bubbles no longer appear at the radiator neck.
Top up the radiator (if you blew water out by revving the engine too high).
replace the cap and done.
Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
Re: 20v thermostat coolant bleeder valve
Thanks Jondee. That is the procedure that I have always used since I could not find the valve. I assumed that this engine did not have it, but I wanted to make sure since I am about to do another flush.
Thanks!
Thanks!