changed thermostats
#1
08-14-2012, 10:24 PM
changed thermostats
I have a lot going on at once here guys so multiple posts are in order.
I decided to replace my tstats because the hoses at the thermostats felt like they were not opening and I was certain they had never been changed.
So the the install went well, but the hoses still feel overpresuured to me like the tstats are not opening. Any ideas? This is an 85 with 40k miles on it.
I decided to replace my tstats because the hoses at the thermostats felt like they were not opening and I was certain they had never been changed.
So the the install went well, but the hoses still feel overpresuured to me like the tstats are not opening. Any ideas? This is an 85 with 40k miles on it.
#2
08-14-2012, 10:52 PM
Veteran Member
The t-stats don't regulate the pressure in the hoses. If you think the pressure is too high, you need to change the radiator caps (both of them).
When you are warming up the engine, if you keep feeling the hoses for temp and they suddenly go from warm to hot, you know the T-stats are opening. Just an easy way of telling.
When you are warming up the engine, if you keep feeling the hoses for temp and they suddenly go from warm to hot, you know the T-stats are opening. Just an easy way of telling.
#3
08-15-2012, 04:00 AM
As Jamey said, also.
Locate the small hose travelling from the header tank in the LH engine bay area TO the atmospheric tank hidden in the LH guard aperture.
This hose transfers coolant to that tank as the pressure blows off from the cap, and allows its return to the system when cooling down. IT BLOCKS UP, so when the pressure cap (the one on that header tank) releases pressure at its set pressure, BUT, the blocked hose allows NO relief of that pressure into the atmospheric tank, so the system overpressurises quite significantly. Usually a hose explodes, or the heater tap lets go, or one I saw blew the heater core inside the car, YUK.
Locate the small hose travelling from the header tank in the LH engine bay area TO the atmospheric tank hidden in the LH guard aperture.
This hose transfers coolant to that tank as the pressure blows off from the cap, and allows its return to the system when cooling down. IT BLOCKS UP, so when the pressure cap (the one on that header tank) releases pressure at its set pressure, BUT, the blocked hose allows NO relief of that pressure into the atmospheric tank, so the system overpressurises quite significantly. Usually a hose explodes, or the heater tap lets go, or one I saw blew the heater core inside the car, YUK.
#4
08-15-2012, 11:10 AM
As Jamey said, also.
Locate the small hose travelling from the header tank in the LH engine bay area TO the atmospheric tank hidden in the LH guard aperture.
This hose transfers coolant to that tank as the pressure blows off from the cap, and allows its return to the system when cooling down. IT BLOCKS UP, so when the pressure cap (the one on that header tank) releases pressure at its set pressure, BUT, the blocked hose allows NO relief of that pressure into the atmospheric tank, so the system overpressurises quite significantly. Usually a hose explodes, or the heater tap lets go, or one I saw blew the heater core inside the car, YUK.
Locate the small hose travelling from the header tank in the LH engine bay area TO the atmospheric tank hidden in the LH guard aperture.
This hose transfers coolant to that tank as the pressure blows off from the cap, and allows its return to the system when cooling down. IT BLOCKS UP, so when the pressure cap (the one on that header tank) releases pressure at its set pressure, BUT, the blocked hose allows NO relief of that pressure into the atmospheric tank, so the system overpressurises quite significantly. Usually a hose explodes, or the heater tap lets go, or one I saw blew the heater core inside the car, YUK.
Ah, this may explain why my upper radiator hose burst on my way home after I purchased the the car.
I will have a look. This is the tank that is hidden behind the left wheel in the body correct? Haven't found it yet....
#5
08-15-2012, 08:00 PM
YEP.
That thing is may be FULL of MUD.
trace that hose to where it passes thru the bodywork, same grommet as the wiring loom. There was originally a "steel pipe" joiner in that area, and being British Tin, it rusted internally and plugged itself.
LHF wheel off, 6?? screws to remove that panel, fun indeed, NOT.
That thing is may be FULL of MUD.
trace that hose to where it passes thru the bodywork, same grommet as the wiring loom. There was originally a "steel pipe" joiner in that area, and being British Tin, it rusted internally and plugged itself.
LHF wheel off, 6?? screws to remove that panel, fun indeed, NOT.
The following users liked this post:
JimC64 (08-15-2012)
#6
08-16-2012, 06:47 PM
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