Heater blows cold
#3
X2, this can be a serious condition, you either have a hose/clamp leak somewhere, or worse, a head gasket leak. Your year D1 has no heater on/off water valve, the coolant always circulates thru the heater core and dampers allow or mix air thru it based on you turning the ***** on the dash.
#4
Also important to note that if coolant is low enough, thermostat will be uncovered and just in a steam cloud. The gauge will show normal, but the engine will grossly overheat. The pix shows the stat hole, and the gauge sensor to the right. The heat hose comes off the intake as well. So if so low there is no flow to heater....
The "output" to heater core is at top left of photo. So it does not take a lot before water is so low it also is not keeping thermostat immersed and the coolant sensor that sticks down thru the roof of the intake mainfold is just hanging in steam. You can see from the red line in the photo that it is not far between "no heat" and "no thermsotat working correctly" and "no gauge to warn you".
EDIT - as noted, if the stat has been run hot without benefit of water around it, who knows if it has been "changed". These type of stats are very cheap, like under $10, two bolts. Available in 192-195 (stock) and 180, and 160 - my experience is the alternate 160 is too cold.
The "output" to heater core is at top left of photo. So it does not take a lot before water is so low it also is not keeping thermostat immersed and the coolant sensor that sticks down thru the roof of the intake mainfold is just hanging in steam. You can see from the red line in the photo that it is not far between "no heat" and "no thermsotat working correctly" and "no gauge to warn you".
EDIT - as noted, if the stat has been run hot without benefit of water around it, who knows if it has been "changed". These type of stats are very cheap, like under $10, two bolts. Available in 192-195 (stock) and 180, and 160 - my experience is the alternate 160 is too cold.
Last edited by Savannah Buzz; 01-13-2013 at 10:56 AM.
#8