decoupe
(deceased)
With respect to a late b35 head cooling system, what is the orientation of the arrow imprinted on the face of the thermostat when viewed from the front? 3 o'clock or 12 oclock? Does it actually make a difference?
Thermostat orientation
- Thread starter decoupe
- Start date
Big difference they say.
The flow needs to go through the bands and not into them.
Try the arrow at the top and verify the flow goes through with minimum resistance.
The flow needs to go through the bands and not into them.
Try the arrow at the top and verify the flow goes through with minimum resistance.
decoupe
(deceased)
Here's what I'm running - "A" housing [11531710959 ] with the later t-stat
[11531713040] and the later cover [11531268650] along with a new triple core rad and 16" pusher fan (3000cfm). All new parts and I just tested the T-stat on the stove and it opened at 80c
In cool weather the fan is running constantly in relatively cool weather with the engine showing steady 92c. I ran the car without a T-stat in the same cool air and the fan never turned on and the engine wouldn't get above 79c unless parked idling when the temp climbed to 92c and the fan ran constantly. The bottom rad hose is cool to the touch all the time.
From this I conclude the water pump and rad are good so the T-stat is not opening but I know the T-stat is good so it has to be how it is installed or oriented. I had the "spring side" facing the rear of the engine and the arrow at 12 o'clock (drilled a 1/8" hole through the arrow). So it's not opening or is opening but insufficient to provide any cooling.
Rotate the T-stat and try again? Will an extra hole "below the water line" make any difference?
[11531713040] and the later cover [11531268650] along with a new triple core rad and 16" pusher fan (3000cfm). All new parts and I just tested the T-stat on the stove and it opened at 80c
In cool weather the fan is running constantly in relatively cool weather with the engine showing steady 92c. I ran the car without a T-stat in the same cool air and the fan never turned on and the engine wouldn't get above 79c unless parked idling when the temp climbed to 92c and the fan ran constantly. The bottom rad hose is cool to the touch all the time.
From this I conclude the water pump and rad are good so the T-stat is not opening but I know the T-stat is good so it has to be how it is installed or oriented. I had the "spring side" facing the rear of the engine and the arrow at 12 o'clock (drilled a 1/8" hole through the arrow). So it's not opening or is opening but insufficient to provide any cooling.
Rotate the T-stat and try again? Will an extra hole "below the water line" make any difference?
Last edited:
decoupe
(deceased)
So I put the T-stat back in with the bands in the vertical and the arrow pointed right (3 o'clock) in the direction of flow through the water neck and now the hose leaving the bottom of the rad warms up so I have flow.
I did drill an new (now extra) hole at the new 12 o'clock position but two holes don't seem to have a negative effect.
Thanks Don
I did drill an new (now extra) hole at the new 12 o'clock position but two holes don't seem to have a negative effect.
Thanks Don